Published: December 2025 | Last updated: April 2026
The 6mm GT was developed jointly by George Gardner of GA Precision and Tom Jacobs of Vapor Trail Bullets and introduced in 2019. It is derived from the 6mm Dasher case geometry, modified with a 30-degree shoulder and a rebated rim that enables reliable magazine feeding in both bolt-action and semi-automatic platforms. Hornady commercialized it quickly, producing factory brass and Match ammunition with 108-grain ELD-M bullets. By 2021 the 6mm GT had become the dominant cartridge in PRS Production division competition, and it continues to set the standard for 6mm precision performance in 2026.
The GT’s design brief was to solve the 6mm Dasher’s primary practical limitation: the Dasher’s case geometry requires single-feeding or dedicated magazine modifications for reliable bolt-action feeding. The GT’s 30-degree shoulder and rebated rim feed reliably from standard short-action magazine boxes. The performance penalty for this feeding improvement is minimal – the GT produces within 20-30 FPS of the Dasher with equivalent bullets in equivalent barrel lengths. In exchange, competitors get a cartridge that works reliably in production-class rifles with standard magazines.
The GT’s other defining characteristic is extreme spread and standard deviation. Published data from competition shooters consistently shows ES of 5-8 FPS and SD of 2-3 FPS with optimized loads – figures that make single-digit ES look ordinary. At 1,000 yards a 10 FPS ES produces approximately 2-3 inches of vertical dispersion. The GT’s 5 FPS ES produces approximately 1.3-1.5 inches of vertical – the difference between a reliable first-round hit on a small steel plate and a marginal result.
For reloading data, see the 6mm GT complete guide. For comparisons, see 6mm Dasher ballistics and 6mm GT ballistics.
Core Ballistic Parameters
| Load | MV | BC (G7) | Muzzle Energy |
|---|---|---|---|
| 103 gr Hornady ELD-X | 3,020 FPS | 0.300 | 2,085 ft-lbs |
| 105 gr Berger Hybrid Target | 3,000 FPS | 0.336 | 2,097 ft-lbs |
| 108 gr Hornady ELD-M | 2,975 FPS | 0.345 | 2,125 ft-lbs |
| 109 gr Berger LRHT | 2,950 FPS | 0.368 | 2,104 ft-lbs |
All data below uses a 200-yard zero, 1.5-inch sight height, 59°F, sea level, 26-28 inch barrel – typical for 6mm GT competition builds. Velocity figures reflect optimized handloads from quality 26-inch barrels. Hornady factory Match 108-grain ELD-M runs approximately 2,920-2,950 FPS from 26 inches.
Bullet Drop (200-Yard Zero)
| Range (yards) | 103 gr ELD-X | 105 gr Berger | 108 gr ELD-M | 109 gr LRHT |
|---|---|---|---|---|
| Muzzle | -1.5 | -1.5 | -1.5 | -1.5 |
| 100 | +1.8 | +1.9 | +1.9 | +2.0 |
| 200 | 0.0 | 0.0 | 0.0 | 0.0 |
| 300 | -6.5 | -6.7 | -6.9 | -7.1 |
| 400 | -18.8 | -19.3 | -19.9 | -20.5 |
| 500 | -37.2 | -38.2 | -39.4 | -40.5 |
| 600 | -62.5 | -64.0 | -66.0 | -67.8 |
| 700 | -95.5 | -97.8 | -100.5 | -103.2 |
| 800 | -137.2 | -140.5 | -144.2 | -148.0 |
| 900 | -189.0 | -193.5 | -198.2 | -203.5 |
| 1,000 | -252.0 | -258.0 | -264.0 | -271.0 |
Drop in inches. Positive values = above line of sight.
The 6mm GT’s trajectory data demonstrates the same characteristic as the 6mm Dasher – with all four bullets starting within 70 FPS of each other, the drop table is governed primarily by BC differences. The 103-grain ELD-X at 3,020 FPS drops less than the 109-grain LRHT at 2,950 FPS at every distance through approximately 1,100-1,150 yards, where the LRHT’s superior BC finally overcomes the ELD-X’s 70 FPS velocity head start. Inside 1,000 yards, choosing loads for trajectory means favoring the faster lighter bullets; choosing for wind resistance means favoring the heavier higher-BC bullets.
Comparing 6mm GT to 6mm Dasher trajectory: the GT 103-grain ELD-X at 3,020 FPS drops 252 inches at 1,000 yards versus the Dasher 103-grain ELD-X at 2,980 FPS dropping 262 inches. The GT shoots 10 inches flatter at 1,000 yards from the 40 FPS velocity advantage. This is the GT’s ballistic argument over the Dasher – modest but real, and it compounds through every yard past 500.
Against the 6mm Creedmoor with 108-grain ELD-M at approximately 3,050 FPS, the GT 108-grain ELD-M at 2,975 FPS drops approximately 8-10 more inches at 1,000 yards. The Creedmoor’s velocity advantage comes from its larger case capacity; the GT counters with substantially better barrel life (3,500-4,500 rounds vs approximately 1,500-2,500 rounds for the Creedmoor) and lower extreme spreads. For competitions where barrel availability between stages matters, the GT’s longer barrel life is a practical advantage.
Wind Drift – 10 MPH Full-Value Crosswind
| Range (yards) | 103 gr ELD-X | 105 gr Berger | 108 gr ELD-M | 109 gr LRHT |
|---|---|---|---|---|
| 100 | 0.7 | 0.7 | 0.7 | 0.6 |
| 200 | 2.8 | 2.7 | 2.6 | 2.5 |
| 300 | 6.4 | 6.1 | 5.9 | 5.6 |
| 400 | 11.6 | 11.0 | 10.6 | 10.1 |
| 500 | 18.5 | 17.5 | 16.9 | 16.0 |
| 600 | 27.0 | 25.5 | 24.5 | 23.2 |
| 700 | 37.2 | 35.0 | 33.6 | 31.8 |
| 800 | 49.5 | 46.5 | 44.5 | 42.0 |
| 900 | 64.0 | 60.0 | 57.2 | 54.0 |
| 1,000 | 81.0 | 75.8 | 72.2 | 68.0 |
Drift in inches. Half-value crosswind = divide by 2.
Wind performance is the 6mm GT’s competition-defining characteristic. The 109-grain LRHT at 68.0 inches of drift at 1,000 yards is among the lowest figures achievable from any standard precision cartridge. To put that in competition context: a 12-inch steel plate at 1,000 yards with a 10 MPH 90-degree crosswind requires a 68-inch hold correction. A 2 MPH wind reading error adds 13.6 inches of uncorrected drift – still inside the 6-inch radius of the plate with some margin. The LRHT gives the 6mm GT shooter the tightest wind correction tolerance of any 6mm production competition load.
The 6mm GT’s wind performance advantage over the 6.5 Creedmoor 140-grain ELD-M (approximately 65-70 inches at 1,000 yards) is essentially zero with the ELD-M and LRHT loads. The GT 108-grain ELD-M at 72.2 inches is within 2-7 inches of the 6.5 Creedmoor 140-grain ELD-M at 65-70 inches. The 6mm GT’s recoil advantage (approximately 4-5 ft-lbs less than the 6.5 Creedmoor) enables faster target-to-target transitions, which in multi-target PRS stages often matters more than the small wind drift difference.
At 800 yards the LRHT drifts 42.0 inches versus 49.5 for the ELD-X – 7.5 fewer inches. In a 10-inch target at 800 yards, that 7.5-inch advantage represents the LRHT staying inside the target where the ELD-X would be a borderline call in a 10 MPH wind with even a small estimation error. This practical difference explains the LRHT’s dominance in competition despite both loads being technically accurate.
Velocity Retention
| Range (yards) | 103 gr ELD-X | 105 gr Berger | 108 gr ELD-M | 109 gr LRHT |
|---|---|---|---|---|
| Muzzle | 3,020 | 3,000 | 2,975 | 2,950 |
| 200 | 2,742 | 2,753 | 2,740 | 2,740 |
| 400 | 2,480 | 2,516 | 2,514 | 2,538 |
| 600 | 2,231 | 2,289 | 2,297 | 2,344 |
| 800 | 1,994 | 2,071 | 2,089 | 2,158 |
| 1,000 | 1,770 | 1,861 | 1,890 | 1,979 |
| 1,100 | 1,662 | 1,759 | 1,791 | 1,886 |
| 1,200 | 1,559 | 1,659 | 1,695 | 1,796 |
| 1,300 | 1,461 | 1,563 | 1,603 | 1,709 |
Velocity in FPS. Supersonic threshold approximately 1,340 FPS at sea level.
The velocity crossover in the 6mm GT occurs earlier than many shooters expect. The ELD-X starts 70 FPS faster than the LRHT, yet by 400 yards the LRHT at 2,538 FPS is already 58 FPS faster than the ELD-X at 2,480 FPS. By 1,000 yards the LRHT leads by 209 FPS (1,979 vs 1,770 FPS). The G7 BC gap (0.368 vs 0.300, a 22.7% difference) produces this progressive velocity advantage that compounds through every yard past 300.
All four loads remain comfortably supersonic past 1,300 yards. The LRHT at 1,709 FPS at 1,300 yards has 369 FPS of supersonic margin remaining. The ELD-X at 1,461 FPS has only 121 FPS of margin at 1,300 yards – approaching the transonic zone that would be reached around 1,350-1,375 yards. For ELR competition genuinely past 1,300 yards, the LRHT is the only appropriate GT load.
For hunting: the 1,800 FPS expansion threshold for the ELD-X is crossed at approximately 825-850 yards in the GT. The ELD-M remains above 1,800 FPS past 875-900 yards; the LRHT past 925-950 yards – though neither is a designed hunting bullet. The GT’s velocity advantage over the Dasher gives the ELD-X approximately 25-30 yards more reliable expansion range.
Energy Retention
| Range (yards) | 103 gr ELD-X | 105 gr Berger | 108 gr ELD-M | 109 gr LRHT |
|---|---|---|---|---|
| Muzzle | 2,085 | 2,097 | 2,125 | 2,104 |
| 200 | 1,720 | 1,768 | 1,802 | 1,814 |
| 400 | 1,408 | 1,477 | 1,512 | 1,558 |
| 500 | 1,268 | 1,345 | 1,381 | 1,432 |
| 600 | 1,137 | 1,222 | 1,263 | 1,319 |
| 800 | 909 | 998 | 1,046 | 1,126 |
| 1,000 | 716 | 808 | 856 | 947 |
| 1,200 | 555 | 641 | 688 | 781 |
Energy in ft-lbs.
The original article’s energy table showed nearly identical values across all loads at every distance (e.g., 1,555/1,550/1,605/1,590 at 400 yards), which is inconsistent with the significant BC differences between loads. The corrected figures show the LRHT producing 150 more ft-lbs than the ELD-X at 400 yards (1,558 vs 1,408 ft-lbs), with the gap widening to 231 ft-lbs at 1,000 yards (947 vs 716 ft-lbs). These differences reflect accurate kinetic energy calculations using the actual velocity retention data.
For deer hunting (1,000 ft-lbs threshold), the ELD-X holds above that mark to approximately 620-635 yards; the Berger Hybrid to approximately 660-675 yards; the ELD-M to approximately 685-700 yards; the LRHT past 800 yards. The 6mm GT with the LRHT delivers deer-adequate energy past 800 yards – competitive with premium 6.5mm hunting loads for deer energy range.
For elk (1,500 ft-lbs threshold), the ELD-X drops below at approximately 355-365 yards; the LRHT at approximately 430-440 yards. The 6mm GT is marginal for elk at any range – muzzle energy of 2,085-2,125 ft-lbs provides modest elk margin only at very close range with the heaviest loads. Use a dedicated elk cartridge.
Terminal Performance Profiles
Hornady ELD-X 103 gr
Construction: Polymer tip with Heat Shield, bonded copper jacket to lead core. The only designed hunting bullet among the four standard GT loads. At the GT’s 3,020 FPS muzzle velocity, the bonded construction is directly relevant – standard cup-and-core bullets can fail through premature core-jacket separation at this velocity on close-range impacts through bone.
Terminal behavior: Expands to 0.44-0.54 inches with 90-95% weight retention. At 3,020 FPS close-range impact, the bonded core maintains integrity through the rapid expansion. Penetration in deer-sized tissue: 14-20 inches. At 500 yards where velocity drops to approximately 2,200 FPS, expansion is more controlled and consistent. The ELD-X expands reliably to approximately 1,600 FPS – past 850 yards in the GT from a 26-inch barrel.
Hunting application: The only hunting-appropriate load among the four standard GT bullets. Deer, antelope, and pronghorn inside 625-635 yards where energy remains above 1,000 ft-lbs. Coyotes and predators to 700 yards where energy and velocity both support reliable expansion and effective terminal performance. The ELD-X is Hornady’s Precision Hunter factory load for the 6mm GT, providing verified trajectory and terminal data. For hunters who want to use a GT for dual competition and hunting duty, the ELD-X covers all deer-class hunting applications inside the cartridge’s energy envelope.
More details: Hornady ELD-X bullet profile
Hornady ELD-M 108 gr
Construction: Match bullet with Heat Shield tip. The factory competition reference load for the 6mm GT – Hornady Match 108-grain ELD-M is the production-class competition standard. Not designed for controlled hunting expansion.
Terminal behavior: At 2,975 FPS the ELD-M produces violent fragmentation at close range through jacket failure at high-velocity impact. At 600 yards (approximately 2,297 FPS), fragmentation is reliable on coyotes and varmints from direct body shots. At 800 yards (approximately 2,089 FPS) the ELD-M still produces significant tissue disruption on predators. Terminal consistency is variable by design – the ELD-M is engineered for steel and paper, not game.
Competition application: The production-class competition benchmark. Hornady Match 6mm GT 108-grain ELD-M is the standard factory load for PRS and NRL competition, providing consistent performance from a commercially available source. In quality GT barrels with 1:7.5 twist, sub-0.3 MOA groups at 100 yards are achievable with Hornady Match factory ammunition. At 1,000 yards in a 10 MPH crosswind, 72.2 inches of drift is competitive with the best 6.5mm production loads. The ELD-M is the correct load for competitors who want verified factory ammunition performance without handloading.
More details: Hornady ELD-M bullet profile
Berger Hybrid Target 105 gr
Construction: Hybrid ogive combining secant and tangent sections. G7 BC of 0.336. The tangent section of the hybrid ogive provides forgiving seating depth tolerance – an important practical advantage in bolt-action rifles where ogive-to-lands distance varies between actions and chamber cuts.
Terminal behavior: Fragments at GT velocities through the thin precision-formed jacket. At close range in the GT’s 3,000 FPS range, the Berger Hybrid produces violent fragmentation on varmints and predators. At 700 yards where velocity drops to approximately 1,960 FPS, fragmentation is still adequate for coyote-sized targets from broadside body shots. Some competitors use the Hybrid on deer and predators for dual competition/hunting duty, accepting the non-bonded terminal behavior.
Competition application: The competition alternative to the ELD-M for competitors whose GT chambers produce better accuracy with Berger’s hybrid ogive geometry. In some rifle-chamber combinations the tangent section of the Berger ogive produces tighter groups than the ELD-M’s Heat Shield tip. The 105-grain Berger Hybrid also provides slightly higher starting velocity than the 108-grain ELD-M, which contributes approximately 3-4 fewer inches of drop at 1,000 yards. For competitors in the 800-1,000 yard range where velocity contributes to trajectory alongside BC, the Berger Hybrid is a legitimate ELD-M alternative.
More details: Berger Hybrid Target bullet profile
Berger LRHT 109 gr
Construction: Long Range Hybrid Target – the highest G7 BC available in a standard 6mm bullet at 109 grains (G7: 0.368). Combines the secant ogive section for maximum aerodynamic efficiency with a tangent section for seating depth tolerance. The LRHT’s BC represents the current practical ceiling for 6mm competition bullets in standard production.
Terminal behavior: Fragments at GT velocities through its thin precision-matched jacket. At close range the fragmentation is dramatic and immediately effective on varmints. At 800 yards where velocity exceeds 2,158 FPS, fragmentation is reliable on coyotes and predators from direct body shots. At 1,000 yards (approximately 1,979 FPS) terminal performance is variable. The LRHT is used by hunters on predators at extended range where maximum BC is prioritized over terminal consistency.
Competition application: The wind-performance and supersonic range ceiling for the 6mm GT. At 1,000 yards in a 10 MPH crosswind, 68.0 inches of drift is the lowest figure achievable from any standard 6mm production load. The LRHT stays supersonic past 1,300 yards with 1,709 FPS remaining, enabling ELR competition stages that the lighter loads cannot reliably reach. In PRS national-level competition where the LRHT has won multiple championships, the combination of the 6mm GT’s low recoil and the LRHT’s superior BC is the standard that competitors must match. For any shooter whose skill level demands the absolute minimum wind correction tolerance from a 6mm production cartridge, the LRHT is the selection.
More details: Berger LRHT bullet profile
Sierra Tipped MatchKing 110 gr
Construction: Acetyl polymer tip over a hollow point boat-tail match bullet. Sierra’s highest-BC 6mm option, providing dimensional consistency from Sierra’s rigorous quality control. The polymer tip maintains BC consistency across temperature ranges – relevant in outdoor competition where morning and afternoon conditions vary significantly.
Terminal behavior: The polymer tip initiates more consistent expansion than the open-tip MatchKing design. At GT velocities the TMK produces reliable fragmentation on varmints and predators inside 700 yards. At 800 yards where velocity drops to approximately 2,000-2,050 FPS, fragmentation is adequate for coyote-sized game from clean shots. Sierra’s TMK is used by benchrest competitors who prefer Sierra’s manufacturing standards and by hunters who want the polymer-tip consistency advantage over Berger’s hollow point design.
Competition application: The Sierra alternative for GT competitors who find better accuracy with Sierra’s bullet geometry in their specific barrels. Sierra sorts components to tighter tolerances than many manufacturers, and lot-to-lot consistency is among the best in the industry. For competitors who test multiple projectiles and find the TMK groups best in their barrel, it competes directly with the ELD-M and Berger Hybrid at 800-1,000 yards. BC at approximately G7 0.355-0.360 for the 110-grain TMK is slightly below the LRHT but competitive with the ELD-M.
More details: Sierra Tipped MatchKing bullet profile
Practical Range Recommendations
Benchrest and precision competition – 108-grain ELD-M for all factory-ammunition competition and most handloading competition inside 1,000 yards; 109-grain LRHT for maximum wind performance at all distances and the definitive choice past 1,000 yards. The ELD-M provides competitive trajectory advantage at shorter stages where starting velocity matters; the LRHT provides wind advantage at all distances that grows with range. In PRS and NRL competition, most professional-level competitors run the LRHT for its wind margin.
Varmints – any load to 600 yards with reliable fragmentation at GT velocities. At 500 yards all loads retain sufficient velocity for effective tissue disruption on prairie dogs and ground squirrels. The ELD-M and Berger loads produce the most dramatic close-range varmint results from their thin competition jackets.
Coyotes and predators – ELD-M or LRHT inside 700-800 yards from broadside body shots where velocity remains above 1,800-2,000 FPS for reliable fragmentation. ELD-X inside 700 yards for the most consistent terminal performance. A 600-yard self-imposed limit for coyote body shots with the ELD-X provides energy above 1,137 ft-lbs.
Deer – ELD-X 103-grain exclusively, inside 600-625 yards. No other standard GT load is appropriate for deer – match bullets are not designed for controlled expansion on game and may fail to produce reliable incapacitation. For deer hunting, the 6mm ARC in AR-15 or bolt-action format provides better factory hunting load support.
Elk – not appropriate. All loads drop below 1,500 ft-lbs inside 350-440 yards. The GT is a precision cartridge, not a large-game energy cartridge.
Platform – the 6mm GT feeds reliably from standard short-action magazine boxes – the GT’s key advantage over the Dasher. Factory rifles from Ruger, Tikka, and others are chambered for it. Factory Hornady Match ammunition makes it accessible without handloading. For competitors who want a production-division cartridge that wins at the highest levels without custom equipment or handloading, the 6mm GT with Hornady Match 108-grain ELD-M is the most complete package available.
Frequently Asked Questions
How does the 6mm GT compare to the 6mm Dasher? Performance within the two cartridges is nearly identical – the GT typically produces 20-40 FPS more velocity than the Dasher with equivalent bullets in equivalent barrel lengths, reflecting the GT’s slightly more optimized case geometry. The practical trajectory difference is 8-12 inches at 1,000 yards. The GT’s meaningful advantages are reliable magazine feeding (no single-feed or magazine modification required), Hornady factory ammunition availability, and compatibility with standard production-class rifles. The Dasher’s advantages are slightly larger case capacity in the longest barrels and a larger library of published competition load data. For new builds in 2026, the GT is the correct choice for most shooters. See 6mm Dasher ballistics for direct comparison.
Is factory ammunition adequate for competition? Hornady Match 108-grain ELD-M is fully competitive at the national PRS level. Multiple championship-level competitors have won matches with factory ammunition. The primary handloading advantage is tuning charge weight and seating depth to a specific barrel’s accuracy node, which can reduce group size and ES below factory levels. For competitors at regional and local level, factory ammunition is completely adequate. For national championship competition, handloading provides marginal but real advantages.
What barrel length is optimal? 26-28 inches for competition. The GT’s case capacity is optimized for this range. A 24-inch barrel loses approximately 50-75 FPS; a 30-inch barrel gains approximately 25-40 FPS. For PRS stages where handling through barricades and props matters, 26 inches is the dominant choice. For benchrest and F-Class where maximum velocity and consistency are prioritized, 28-30 inches is common.
What twist rate is required? 1:7.5 or 1:8 twist for reliable stabilization of 103-109 grain 6mm bullets at GT velocities. The standard GT barrel specification is 1:7.5 twist. At these bullet weights and 2,950-3,020 FPS, a 1:8 twist may work marginally for lighter bullets but is not ideal for the 108-109 grain competition loads. 1:9 or slower will not reliably stabilize these weights.
What powders work best in the 6mm GT? Hodgdon H4350 is the most commonly used competition powder, producing excellent velocity and consistent ES with all GT bullet weights. Alliant Reloder 16 is a strong alternative with slightly different temperature sensitivity. Hodgdon Varget works well with lighter 95-103 grain bullets. Hodgdon H4895 provides low ES with excellent case fill. IMR 4451 Enduron offers temperature-insensitive performance valued for outdoor competition across seasons. See the 6mm GT complete guide for specific charge weights and start loads.
How does barrel life compare to the 6mm Creedmoor? The GT provides approximately 3,500-4,500 rounds of accurate barrel life versus the 6mm Creedmoor’s approximately 1,500-2,500 rounds. For a PRS competitor firing 800-1,000 rounds per season, the GT provides 3.5-5 seasons of barrel life versus 1.5-2.5 seasons for the Creedmoor. The cost difference of one barrel replacement per season is meaningful in a sport where quality custom barrels run $400-600.
Editorial note: This article was originally published in December 2025 and revised in April 2026. The revision corrected the energy table (the original showed nearly identical values across all loads at every distance – e.g., 1,555/1,550/1,605/1,590 at 400 yards – inconsistent with the significant BC differences between the ELD-X G7 0.300 and LRHT G7 0.368; corrected figures show the LRHT producing 150 more ft-lbs than the ELD-X at 400 yards), added velocity retention table extended to 1,300 yards, explained the velocity crossover where the LRHT overtakes the ELD-X in retained velocity by 400 yards, added specific deer and elk energy range ceilings, added the elk limitation note, and added FAQ with powder recommendations.
