Published: January 2026 | Last updated: May 2026
Disclaimer: Ballistic data in this article is drawn from manufacturer publications and established reloading references. All shooting and hunting distances should be determined by the individual shooter based on their equipment, skill level, and field conditions. Always confirm zero at the range before hunting season. For reloading data and cartridge history, see the 270 Weatherby Magnum complete guide.
Roy Weatherby introduced the 270 Weatherby Magnum in 1943 as the first proprietary Weatherby cartridge, built on a blown-out, belted version of the 300 H&H Magnum case necked down to accept .277-inch bullets. Weatherby’s design philosophy centered on velocity – the belief that higher impact speed produced more decisive kills through increased hydrostatic shock – and the 270 Weatherby was the first expression of that philosophy. It pushed 130-grain bullets to 3,375 fps at a time when the 270 Winchester was considered a fast cartridge at 3,060 fps. That 300+ fps advantage remains today.
The cartridge fires .277-inch diameter bullets, the same bore as the 270 Winchester and 270 WSM. Bullet weights run from 130 to 150 grains in standard commercial loadings. At these velocities, cup-and-core and thin-jacketed bullets can fragment excessively at close range – a practical consideration that drives bullet selection toward bonded and monolithic designs for hunting inside 200 yards. For a direct comparison with its closest competitors, the 270 Winchester ballistics and 270 WSM ballistics articles show how the Weatherby’s velocity advantage translates into field performance differences.
Core External Ballistics
The three loads used throughout this article cover the practical weight range for the 270 Weatherby Magnum. Muzzle velocities reflect published Weatherby factory data from a 26-inch barrel; 24-inch barrels typical on many sporting rifles will yield approximately 40 to 60 fps less.
| Load | Bullet Weight | MV (fps) | BC (G7) | Muzzle Energy (ft-lbs) |
|---|---|---|---|---|
| Nosler Ballistic Tip | 130 gr | 3,375 | 0.230 | 3,289 |
| Nosler AccuBond | 140 gr | 3,200 | 0.261 | 3,186 |
| Nosler Partition | 150 gr | 3,100 | 0.261 | 3,200 |
All three loads exceed 3,180 ft-lbs at the muzzle – substantially above the elk energy threshold. The 150-grain Partition produces the most muzzle energy of the three despite its lower starting velocity, because the additional mass compensates for the velocity deficit. At close range all three are formidable; the divergence in performance develops past 400 yards, where the 140 and 150-grain loads’ higher BCs sustain energy and resist wind more efficiently than the 130-grain.
Important note on cup-and-core bullets at close range: At the 270 Weatherby’s muzzle velocities of 3,100 to 3,375 fps, standard cup-and-core and thin-jacketed bullets such as the Nosler Ballistic Tip can fragment aggressively on impact at close range – inside 150 yards – potentially limiting penetration depth. For shots inside that distance on large or tough game, bonded bullets like the Nosler AccuBond or monolithics like the Barnes TTSX are the safer choice. This applies to all extremely high-velocity cartridges, not just the 270 Weatherby.
Bullet Drop to 1,000 Yards (200-Yard Zero)
All data assumes a 200-yard zero, 59°F, sea level, and a 1.5-inch sight height. A 200-yard zero is standard for high-velocity magnum cartridges and extends the practical no-holdover window compared to a 100-yard zero.
| Range (Yards) | 130gr Ballistic Tip (in) | 140gr AccuBond (in) | 150gr Partition (in) |
|---|---|---|---|
| 100 | +1.5 | +1.6 | +1.7 |
| 200 | 0 | 0 | 0 |
| 300 | -6.9 | -7.3 | -7.8 |
| 400 | -19.8 | -21.0 | -22.5 |
| 500 | -39.8 | -42.2 | -45.3 |
| 600 | -67.5 | -71.9 | -77.4 |
| 700 | -104.8 | -111.8 | -120.5 |
| 800 | -152.8 | -163.4 | -176.3 |
| 900 | -213.5 | -228.2 | -246.7 |
| 1,000 | -289.0 | -309.6 | -334.9 |
With a 200-yard zero, the 270 Weatherby’s trajectory stays within 2 inches of point of aim from the muzzle to approximately 255 yards with the 130-grain load – a genuine extended no-holdover window. At 300 yards the correction is only 7 to 8 inches depending on load, which is achievable with a known holdover or a single dial of elevation. This is the practical advantage of the Weatherby’s high velocity over standard 270 Winchester loads, which need a more deliberate correction at 300 yards.
At 400 yards, drops reach 20 to 22 inches – more than a foot and a half of correction required. This demands verified range and a dialed solution. A 50-yard ranging error at 400 yards produces approximately 8 to 9 inches of vertical error – enough to miss the vital zone of a deer entirely if the shot is called low. Precise ranging is non-negotiable past 350 yards with this cartridge.
The 130-grain Ballistic Tip drops the least at every distance to approximately 700 yards, where the 140-grain AccuBond’s higher BC begins closing the gap. By 1,000 yards the 140-grain has dropped 20.6 inches less than the 130-grain – a meaningful difference at that distance driven entirely by BC advantage. For shots inside 500 yards the 130-grain’s flat trajectory is its main selling point; beyond that, the heavier loads become increasingly competitive on trajectory and decisively superior on energy and wind resistance.
Wind Drift (10 mph Full-Value Crosswind)
The original version of this article showed the 140-grain and 150-grain loads with identical wind drift values at every distance – a copy-paste error. The two loads share the same G7 BC of 0.261, which explains similar but not identical drift values; the 150-grain starts slower, spending more time in the wind at every distance. The corrected figures are below.
| Range (Yards) | 130gr Ballistic Tip (in) | 140gr AccuBond (in) | 150gr Partition (in) |
|---|---|---|---|
| 100 | 0.5 | 0.5 | 0.5 |
| 200 | 2.2 | 2.0 | 2.1 |
| 300 | 5.1 | 4.8 | 5.0 |
| 400 | 9.2 | 8.6 | 9.0 |
| 500 | 14.8 | 13.8 | 14.4 |
| 600 | 21.8 | 20.3 | 21.2 |
| 700 | 30.3 | 28.1 | 29.4 |
| 800 | 40.6 | 37.6 | 39.4 |
| 900 | 52.6 | 48.7 | 51.1 |
| 1,000 | 66.6 | 61.5 | 64.5 |
The 140-grain AccuBond shows the least wind drift of the three loads at every distance, drifting 61.5 inches at 1,000 yards versus 66.6 inches for the 130-grain – a 5.1-inch advantage produced by its superior BC despite starting 175 fps slower. At 400 yards in a 10 mph crosswind, the AccuBond drifts 8.6 inches versus the Ballistic Tip’s 9.2 inches – close enough that either load requires the same wind call in practice.
At 500 yards in a 10 mph crosswind, all three loads drift between 13.8 and 14.8 inches – consuming the majority of an elk’s vital zone margin. A hunter who misestimates a 10 mph wind by 3 mph at 500 yards will be off by 4 to 4.5 inches, which is still within the vital zone but leaves very little room. At 600 yards and beyond, accurate wind estimation becomes as important as elevation correction for hitting vital zones reliably.
Inside 400 yards in moderate crosswinds, all three loads perform within manageable limits – under 9.2 inches of drift in a 10 mph crosswind, which is compensable with a known wind hold on any big game animal. This is the 270 Weatherby’s practical hunting sweet spot.
Velocity Retention
At these velocities, the expansion thresholds of interest are 1,800 fps for standard soft points, 1,600 fps for bonded designs like the AccuBond, and 1,500 fps for monolithics like the Barnes TTSX. The 270 Weatherby’s starting velocities are high enough that these floors are not reached until well past any practical hunting distance.
| Range (Yards) | 130gr Ballistic Tip (fps) | 140gr AccuBond (fps) | 150gr Partition (fps) |
|---|---|---|---|
| 0 | 3,375 | 3,200 | 3,100 |
| 200 | 3,007 | 2,880 | 2,790 |
| 400 | 2,661 | 2,573 | 2,494 |
| 600 | 2,336 | 2,279 | 2,213 |
| 800 | 2,032 | 2,000 | 1,945 |
| 1,000 | 1,751 | 1,735 | 1,689 |
| 1,200 | ~1,495 | ~1,484 | ~1,448 |
All three loads remain above 1,800 fps past 900 yards – well beyond any ethical hunting distance for this cartridge. The 130-grain Ballistic Tip drops below 1,800 fps at approximately 1,000 yards, while the bonded AccuBond and Partition hold above 1,600 fps to beyond 1,100 yards.
The velocity data confirms that bullet performance is not the limiting factor for the 270 Weatherby at any practical hunting distance. Energy and shooter capability set the ethical ceiling, not bullet expansion velocity. All loads remain firmly supersonic past 1,200 yards at sea level.
The more relevant velocity consideration for the 270 Weatherby is close-range impact velocity. At 50 yards, the 130-grain Ballistic Tip is hitting at approximately 3,320 fps – high enough to cause explosive fragmentation with thin-jacketed bullets on large game. This reinforces the bullet selection guidance in the introduction: bonded or monolithic bullets are strongly preferred for shots inside 200 yards on large or tough game.
Energy Retention
The thresholds: 1,000 ft-lbs for deer, 1,500 ft-lbs for elk and moose.
| Range (Yards) | 130gr Ballistic Tip (ft-lbs) | 140gr AccuBond (ft-lbs) | 150gr Partition (ft-lbs) |
|---|---|---|---|
| 0 | 3,289 | 3,186 | 3,200 |
| 100 | 2,608 | 2,579 | 2,594 |
| 200 | 2,612 | 2,580 | 2,592 |
| 300 | 2,116 | 2,167 | 2,182 |
| 400 | 1,624 | 1,826 | 1,851 |
| 500 | 1,350 | 1,576 | 1,579 |
| 600 | 1,112 | 1,357 | 1,341 |
| 700 | 910 | 1,163 | 1,133 |
| 800 | 737 | 990 | 952 |
| 900 | 598 | 840 | 799 |
| 1,000 | 484 | 711 | 669 |
The energy data reveals a sharp performance divide between the 130-grain Ballistic Tip and the heavier loads at extended range. For elk, the 1,500 ft-lbs threshold is maintained as follows:
- 130gr Ballistic Tip: approximately 415 yards
- 140gr AccuBond: approximately 565 yards
- 150gr Partition: approximately 560 yards
The 140 and 150-grain loads extend the ethical elk hunting range by nearly 150 yards compared to the 130-grain – a direct consequence of their superior BCs and higher mass sustaining energy more efficiently downrange. For hunters who anticipate shots past 400 yards on elk, the AccuBond or Partition are the clear choice; for deer inside 400 yards, all three loads are more than adequate.
For deer, the 1,000 ft-lbs threshold is exceeded by the 140 and 150-grain loads well past 800 yards, and by the 130-grain to approximately 700 yards. The 270 Weatherby is more than capable for deer at any range a hunter can practically and ethically execute.
Terminal Performance Profiles
Hornady Interlock
The Hornady Interlock uses a mechanical ring between jacket and lead core to prevent separation during expansion. A correction from the original article, which stated the Interlock “disintegrates into dust on impact at close ranges.” That description applies to thin-jacketed varmint bullets, not the Interlock. At 270 Weatherby impact velocities inside 200 yards, the Interlock expands aggressively and can shed some front-core material at the highest velocities, but it does not disintegrate – the interlocking ring specifically prevents that outcome. In gel at 300-yard impact velocities it mushrooms to 1.4 to 1.6 times its original diameter and penetrates 14 to 18 inches with weight retention in the 70 to 80 percent range.
For the 270 Weatherby, the Interlock is a reliable deer load inside 350 yards where impact velocities are above 2,800 fps and expansion is controlled. At extreme close range inside 100 yards, the high impact velocity can drive aggressive front-core expansion that reduces penetration depth – a bonded bullet is more consistent in that scenario. Inside 200 to 350 yards, the Interlock delivers reliable performance on deer-sized game.
Best application: Deer at 100 to 350 yards. Not recommended for elk or heavy-boned game at close range.
Nosler AccuBond
The Nosler AccuBond is a polymer-tipped bonded bullet with a tapered copper jacket electrochemically bonded to the lead core, preventing separation at the 270 Weatherby’s extreme close-range velocities. In gel it expands to 1.5 to 1.8 times its original diameter and penetrates 16 to 20 inches with weight retention consistently above 65 percent even at 3,200 fps impact velocities. Its bonded construction ensures controlled, consistent expansion whether the bullet hits at muzzle-adjacent velocity or at 1,700 fps past 900 yards.
For the 270 Weatherby, the 140-grain AccuBond is the primary all-around hunting recommendation. It handles the cartridge’s extreme close-range velocities without jacket failure, expands reliably at extended-range impact velocities, maintains the elk energy standard to approximately 565 yards, and produces the least wind drift of the three loads. For deer, elk, and pronghorn across the full range of hunting distances this cartridge is used at, the AccuBond covers every scenario competently.
Best application: Deer, elk, and pronghorn at 75 to 600 yards. The top all-around recommendation for the 270 Weatherby Magnum.
Barnes TTSX
The Barnes TTSX is an all-copper monolithic bullet expanding via four petals at velocities as low as 1,500 fps, retaining virtually 100 percent of its original weight. In gel at 270 Weatherby impact velocities it drives 18 to 24 inches with a wide, consistent wound channel. At close-range velocities above 3,000 fps the four petals open dramatically, creating a wound channel substantially wider than the bullet’s original diameter.
For the 270 Weatherby, the TTSX is the best choice for close-range large game – particularly hogs and black bear inside 200 yards – because its monolithic construction guarantees no jacket-core separation regardless of impact angle or bone encountered. It is also the required choice for lead-free hunting zones in California and parts of Canada. The slightly lower BC of all-copper bullets compared to lead-core designs of equivalent weight means the TTSX is best suited to shots inside 400 yards, where its velocity advantage over heavier loads offsets the BC difference.
Best application: Bear, hogs, elk, and deer at 50 to 400 yards. Required for lead-free zones.
Nosler Ballistic Tip
The Nosler Ballistic Tip uses a polymer tip and thin copper jacket designed for rapid, violent expansion. In gel at standard hunting velocities it expands to 1.6 to 2.0 times its original diameter and creates a large wound channel, though at the 270 Weatherby’s extreme velocities the expansion can be more aggressive than intended – particularly inside 200 yards where impact velocities approach or exceed 3,200 fps. At those speeds, the front core can fragment nearly completely, limiting penetration depth to 10 to 14 inches. On deer this typically produces a decisive, rapid kill; on elk or heavy-muscled game it can fail to reach vitals on angled shots.
Beyond 200 yards, as impact velocity drops below 2,800 fps, the Ballistic Tip’s expansion becomes more controlled and its terminal performance improves for medium game. For deer at 200 to 450 yards it is an effective, flat-shooting choice. For elk and any large game, a bonded or monolithic bullet is strongly preferred regardless of distance.
Best application: Deer and pronghorn at 200 to 450 yards. Not recommended for elk or large game inside 200 yards.
Nosler Partition
The Nosler Partition in 150-grain is the most capable bullet for large, tough game in the 270 Weatherby lineup. Its dual-core design – expanding front section separated from the solid rear by a copper partition – means the rear section retains mass and continues driving deep regardless of what the front half encounters. In gel it penetrates 16 to 22 inches with consistent mushrooming and near-complete rear-core weight retention.
At the 270 Weatherby’s close-range velocities, the Partition’s front core expands aggressively but does not separate from the rear, which continues forward. At longer-range impact velocities the front expands more moderately, with the rear section fully intact throughout. For elk hunting inside 500 yards with this cartridge, the 150-grain Partition is the most reliable choice for angled shots through shoulder bone. The 270 Weatherby’s velocity gives it a meaningful advantage in penetration depth compared to the same bullet from a standard 270 Winchester.
Best application: Elk, moose, and large deer at 50 to 500 yards. Best choice for tough angles on large game.
Practical Range Recommendations
The 270 Weatherby is a legitimate 550-yard elk cartridge with the right bullets – one of the few non-.30 magnums that meets the 1,500 ft-lbs elk standard at that distance. Its velocity advantage over the 270 Winchester is most meaningful in open-country hunting where the flat trajectory reduces holdover at 300 to 400 yards, and where the extended energy envelope adds meaningful range on large game.
Whitetail and mule deer: All three loads meet the 1,000 ft-lbs deer minimum past 700 yards. The practical limit is the shooter’s skill and wind-reading capability. For most hunters, 500 yards is a responsible maximum in typical field conditions. The 130-grain Ballistic Tip is the flattest-shooting choice for open-country mule deer; the 140-grain AccuBond provides better all-range performance.
Elk: The 140-grain AccuBond maintains the 1,500 ft-lbs elk standard to approximately 565 yards – among the longest ethical elk ranges achievable from a .270 caliber cartridge. In realistic mountain hunting with wind and ranging variables, 500 yards is a responsible practical maximum for most hunters. Inside 300 yards the 270 Weatherby is a thoroughly dominant elk cartridge, delivering more than 2,100 ft-lbs with the AccuBond or Partition.
Pronghorn: The 130-grain Ballistic Tip at 3,375 fps is one of the flattest-shooting pronghorn loads available. At 500 yards, it has dropped only 39.8 inches below a 200-yard zero and retains 1,350 ft-lbs – more than adequate for pronghorn at that distance. The extreme close-range fragmentation concern does not apply for pronghorn, where shots under 100 yards are uncommon in open sagebrush terrain.
Black bear and hogs: Inside 300 yards with the Nosler Partition or Barnes TTSX. Both animals require reliable deep penetration, and the bonded or monolithic construction handles the 270 Weatherby’s high impact velocities without destructive fragmentation.
For broader context on the .270 caliber family, the 270 Winchester vs 30-06 Springfield comparison and the 270 WSM ballistics article show where the Weatherby fits in practical performance terms.
FAQ
How does the 270 Weatherby Magnum compare to the 270 Winchester?
The 270 Weatherby pushes 130-grain bullets at 3,375 fps versus approximately 3,060 fps for the 270 Winchester – a 315 fps advantage that translates to roughly 400 ft-lbs more muzzle energy and a noticeably flatter trajectory. The 270 Weatherby maintains the 1,500 ft-lbs elk threshold to approximately 565 yards with the 140-grain AccuBond, compared to roughly 400 yards for the 270 Winchester with equivalent loads. The trade-offs are more recoil, higher ammunition cost, and proprietary Weatherby brass. For hunters who primarily shoot inside 400 yards on deer, the 270 Winchester is more than adequate. For open-country elk hunting where shots regularly extend to 500 yards, the Weatherby’s additional capability is meaningful.
What is the maximum ethical range for the 270 Weatherby on elk?
With the 140-grain AccuBond or 150-grain Partition, the 1,500 ft-lbs elk threshold is maintained to approximately 560 to 565 yards. In realistic field conditions with wind and ranging variables, 500 yards is a responsible practical maximum for most experienced hunters. Inside 400 yards with either load, the 270 Weatherby delivers more than 1,800 ft-lbs on elk – a comfortable margin above the minimum.
Why should I use bonded bullets at close range with the 270 Weatherby?
The 270 Weatherby’s muzzle velocities of 3,100 to 3,375 fps produce impact velocities inside 100 yards that can cause thin-jacketed cup-and-core bullets to fragment excessively, reducing penetration depth on large or tough game. The Nosler Ballistic Tip and similar varmint-grade or standard cup-and-core designs are at greatest risk. Bonded bullets like the AccuBond and Partition, and monolithics like the Barnes TTSX, maintain structural integrity at those impact velocities and produce consistent, deep penetration regardless of range.
Is the 270 Weatherby suitable for moose?
Yes, inside 400 yards with the Nosler Partition 150-grain or Barnes TTSX. Moose require deep, reliable penetration from any angle, and the Partition’s dual-core and the TTSX’s monolithic construction deliver that at 270 Weatherby velocities. At 400 yards the 150-grain Partition retains approximately 1,851 ft-lbs – above the 1,500 ft-lbs moose threshold. Shot placement remains critical; the 270 Weatherby is a capable moose cartridge with the right bullets inside that distance.
What powders work best for handloading the 270 Weatherby?
The 270 Weatherby’s large case capacity requires slow-burning powders to reach maximum velocity safely. Hodgdon H4831 and Hodgdon H4831SC are the most widely cited choices and are referenced extensively in Weatherby and Hodgdon published data. Alliant Reloder 22 and Alliant Reloder 25 produce excellent velocities with 130 to 150-grain bullets. IMR 7828 and IMR 7828 SSC are established alternatives. Hodgdon Retumbo works well with the heavier 150-grain loads where maximum velocity is the goal. Always start 10 percent below the published maximum charge and work up carefully – Weatherby brass is proprietary and pressure signs can appear quickly as loads approach maximum.
What primers does the 270 Weatherby use?
Large rifle magnum primers are standard. The Federal 215 and CCI 250 are the most commonly specified in published load data. The Federal GM215M match magnum primer is popular for handloaders seeking maximum consistency at long range. The slow-burning powders required by the Weatherby’s large case need the hotter, sustained ignition of a magnum primer for complete, consistent combustion.
Disclaimer: Ballistic data in this article is provided for reference purposes only. Actual performance will vary based on rifle barrel length, atmospheric conditions, altitude, and individual load parameters. Always verify your zero at the range before any hunt. Do not apply published handload data without consulting current reloading manuals from Hodgdon, Hornady, Nosler, or Weatherby. Never exceed maximum published charges. The author and myreloading.com assume no responsibility for misuse of this information.
Editorial note: Originally published January 2026, revised May 2026. This revision converted all ballistic tables to a 200-yard zero appropriate for a high-velocity magnum cartridge, added muzzle energy figures absent from the original energy table, corrected wind drift values for the 140 and 150-grain loads (the original showed identical values for both at every distance due to a copy-paste error), corrected the Hornady Interlock description (the original incorrectly stated it “disintegrates into dust” – this describes varmint bullets, not the Interlock), added a cup-and-core close-range fragmentation warning appropriate for Weatherby velocities, and added a velocity retention table.
