Load Specifications
Load data in caliber .303 British with .312 | 160gr | Atomic 29 HP bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 1200-R, Hodgdon BL-C2 and Hodgdon LEVERevolution.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 92% | 46,441 psi | 88% | 2572 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 47,892 psi | 90% | 2638 fps | 95.9% |
| Accurate 2230 | <<locked>> | 84% | 47,718 psi | 90% | 2641 fps | 96.3% |
| Accurate 2460 | <<locked>> | 88% | 44,556 psi | 84% | 2575 fps | 99.2% |
| Accurate 2495ᴾ | <<locked>> | 100% | 47,195 psi | 89% | 2651 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 45,281 psi | 86% | 2625 fps | 99.1% |
| Accurate 4064ᴾ | <<locked>> | 100% | 43,830 psi | 83% | 2628 fps | 99.6% |
| Accurate LT-30 | <<locked>> | 84% | 46,209 psi | 87% | 2497 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 84% | 46,615 psi | 88% | 2507 fps | 99.1% |
| ADI AR 2206H | <<locked>> | 94% | 45,513 psi | 86% | 2618 fps | 96.4% |
| ADI AR 2207 | <<locked>> | 82% | 46,311 psi | 87% | 2526 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 46,746 psi | 88% | 2612 fps | 95.8% |
| ADI AR 2219 | <<locked>> | 86% | 47,210 psi | 89% | 2635 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 92% | 45,716 psi | 86% | 2595 fps | 97.7% |
| Alliant AR-Comp | <<locked>> | 94% | 46,195 psi | 87% | 2644 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 45,919 psi | 87% | 2680 fps | 97.3% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 44,469 psi | 84% | 2628 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 88% | 46,963 psi | 89% | 2592 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 45,687 psi | 86% | 2644 fps | 95.9% |
| Alliant Reloder-7 | <<locked>> | 82% | 47,572 psi | 90% | 2539 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 47,456 psi | 90% | 2533 fps | 100% |
| Bofors RP3ᴾ | <<locked>> | 100% | 43,918 psi | 83% | 2631 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 90% | 45,643 psi | 86% | 2549 fps | 98.2% |
| Hodgdon BL-C2 | <<locked>> | 94% | 45,847 psi | 87% | 2657 fps | 98.4% |
| Hodgdon H322 | <<locked>> | 88% | 45,774 psi | 86% | 2612 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 88% | 46,659 psi | 88% | 2631 fps | 99.6% |
| Hodgdon H4198 | <<locked>> | 82% | 47,805 psi | 90% | 2536 fps | 99.8% |
| Hodgdon H4895 | <<locked>> | 94% | 45,730 psi | 86% | 2631 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 46,876 psi | 89% | 2697 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,127 psi | 63% | 1601 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 47,732 psi | 90% | 2641 fps | 97.4% |
| IMR 3031 | <<locked>> | 96% | 46,818 psi | 88% | 2687 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 45,977 psi | 87% | 2595 fps | 95.9% |
| IMR 4198 | <<locked>> | 86% | 45,716 psi | 86% | 2523 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 46,746 psi | 88% | 2677 fps | 96.9% |
| IMR 8208 XBR | <<locked>> | 92% | 45,716 psi | 86% | 2595 fps | 97.7% |
| Lovex D073.4 | <<locked>> | 82% | 44,759 psi | 85% | 2582 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 90% | 47,906 psi | 90% | 2631 fps | 98.8% |
| Lovex D073.6 | <<locked>> | 96% | 46,035 psi | 87% | 2651 fps | 99.2% |
| Lovex S060 | <<locked>> | 94% | 47,239 psi | 89% | 2569 fps | 96.7% |
| Lovex S062ᴾ | <<locked>> | 100% | 47,732 psi | 90% | 2644 fps | 98.2% |
| Norma 200 | <<locked>> | 84% | 46,717 psi | 88% | 2566 fps | 100% |
| Norma 201 | <<locked>> | 96% | 47,210 psi | 89% | 2621 fps | 98.1% |
| Norma 202 | <<locked>> | 96% | 47,268 psi | 89% | 2641 fps | 99.6% |
| Norma 203Bᴾ | <<locked>> | 100% | 47,790 psi | 90% | 2684 fps | 97% |
| Ramshot Big Game | <<locked>> | 98% | 45,295 psi | 86% | 2648 fps | 95.9% |
| Ramshot Wild Boar | <<locked>> | 94% | 47,688 psi | 90% | 2661 fps | 96.8% |
| Ramshot X-Terminator | <<locked>> | 90% | 47,079 psi | 89% | 2592 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,822 psi | 62% | 1634 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 45,672 psi | 86% | 2592 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 98% | 47,906 psi | 90% | 2746 fps | 96.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 42,525 psi | 80% | 2661 fps | 98.2% |
| Rottweil R 901 | <<locked>> | 92% | 45,353 psi | 86% | 2575 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 98% | 47,572 psi | 90% | 2618 fps | 98.1% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 40,524 psi | 77% | 2562 fps | 96% |
| Shooters World AR Plus | <<locked>> | 82% | 44,759 psi | 85% | 2582 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 96% | 46,035 psi | 87% | 2651 fps | 99.2% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 47,732 psi | 90% | 2644 fps | 98.2% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 45,774 psi | 86% | 2556 fps | 97.3% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 47,747 psi | 90% | 2641 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 44,947 psi | 85% | 2556 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 47,094 psi | 89% | 2641 fps | 96.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 47,514 psi | 90% | 2552 fps | 99.5% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 46,238 psi | 87% | 2546 fps | 99.9% |
| Somchem S321 | <<locked>> | 90% | 46,079 psi | 87% | 2625 fps | 98.1% |
| Somchem S335 | <<locked>> | 94% | 45,890 psi | 87% | 2549 fps | 99.8% |
| Somchem S341 | <<locked>> | 94% | 45,992 psi | 87% | 2608 fps | 96.3% |
| Somchem S355ᴾ | <<locked>> | 100% | 42,105 psi | 80% | 2572 fps | 96.2% |
| Vihtavuori N120 | <<locked>> | 82% | 46,412 psi | 88% | 2480 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 47,456 psi | 90% | 2543 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 47,065 psi | 89% | 2552 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 45,600 psi | 86% | 2612 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 47,674 psi | 90% | 2621 fps | 99.8% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 40,596 psi | 77% | 2520 fps | 97.2% |
| Vihtavuori N530 | <<locked>> | 92% | 45,803 psi | 87% | 2592 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 98% | 45,963 psi | 87% | 2612 fps | 99.4% |
| Winchester 748 | <<locked>> | 94% | 47,123 psi | 89% | 2680 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 96% | 46,079 psi | 87% | 2644 fps | 97.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 31,531 psi | 60% | 2297 fps | 98.9% |
| Accurate 2200 | <<locked>> | 82% | 44,788 psi | 85% | 2582 fps | 95.1% |
| Accurate 2230 | <<locked>> | 82% | 44,208 psi | 84% | 2582 fps | 95.5% |
| Accurate 2460 | <<locked>> | 80% | 33,808 psi | 64% | 2369 fps | 97% |
| Accurate 2495 | <<locked>> | 80% | 23,757 psi | 45% | 2172 fps | 96.8% |
| Accurate 2520 | <<locked>> | 80% | 29,515 psi | 56% | 2310 fps | 95% |
| Accurate 4064 | <<locked>> | 86% | 27,630 psi | 52% | 2290 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 40,799 psi | 77% | 2405 fps | 99.5% |
| Accurate LT-32 | <<locked>> | 80% | 41,162 psi | 78% | 2415 fps | 98.3% |
| ADI AR 2206H | <<locked>> | 90% | 40,234 psi | 76% | 2520 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 43,555 psi | 82% | 2484 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 43,787 psi | 83% | 2562 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 38,450 psi | 73% | 2480 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 86% | 37,608 psi | 71% | 2444 fps | 95.7% |
| Alliant AR-Comp | <<locked>> | 80% | 28,993 psi | 55% | 2316 fps | 99.9% |
| Alliant Power Pro 1200-R | 36.1 gr | 82% | 37,376 psi | 71% | 2513 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 36,709 psi | 69% | 2480 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 36,579 psi | 69% | 2411 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 42,801 psi | 81% | 2592 fps | 95.1% |
| Alliant Reloder-7 | <<locked>> | 80% | 44,512 psi | 84% | 2490 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 38,885 psi | 73% | 2392 fps | 99.4% |
| Bofors RP3 | <<locked>> | 96% | 38,174 psi | 72% | 2526 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 35,621 psi | 67% | 2356 fps | 95.7% |
| Hodgdon BL-C2 | 40.4 gr | 86% | 34,809 psi | 66% | 2448 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 80% | 35,099 psi | 66% | 2415 fps | 98.5% |
| Hodgdon H335 | <<locked>> | 80% | 35,549 psi | 67% | 2428 fps | 97.7% |
| Hodgdon H4198 | <<locked>> | 80% | 45,049 psi | 85% | 2490 fps | 99.6% |
| Hodgdon H4895 | <<locked>> | 88% | 37,855 psi | 72% | 2484 fps | 95% |
| Hodgdon LEVERevolution | 42.4 gr | 92% | 38,696 psi | 73% | 2543 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,308 psi | 46% | 1427 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 39,262 psi | 74% | 2490 fps | 95.2% |
| IMR 3031 | <<locked>> | 80% | 27,775 psi | 52% | 2293 fps | 97% |
| IMR 4064 | <<locked>> | 96% | 43,323 psi | 82% | 2549 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 38,101 psi | 72% | 2398 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 40,930 psi | 77% | 2572 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 86% | 37,608 psi | 71% | 2444 fps | 95.7% |
| Lovex D073.4 | <<locked>> | 80% | 41,800 psi | 79% | 2530 fps | 98.3% |
| Lovex D073.5 | <<locked>> | 80% | 33,518 psi | 63% | 2362 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 84% | 30,385 psi | 57% | 2343 fps | 95.3% |
| Lovex S060 | <<locked>> | 90% | 41,887 psi | 79% | 2477 fps | 95.4% |
| Lovex S062 | <<locked>> | 92% | 37,173 psi | 70% | 2454 fps | 95.7% |
| Norma 200 | <<locked>> | 80% | 41,133 psi | 78% | 2477 fps | 100% |
| Norma 201 | <<locked>> | 88% | 36,521 psi | 69% | 2425 fps | 95.5% |
| Norma 202 | <<locked>> | 80% | 28,195 psi | 53% | 2254 fps | 95.2% |
| Norma 203B | <<locked>> | 96% | 41,887 psi | 79% | 2579 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 96% | 42,482 psi | 80% | 2595 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 90% | 41,611 psi | 79% | 2556 fps | 95.3% |
| Ramshot X-Terminator | <<locked>> | 86% | 41,510 psi | 78% | 2493 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,192 psi | 46% | 1460 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 35,056 psi | 66% | 2388 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 44,831 psi | 85% | 2690 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 35,128 psi | 66% | 2493 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 31,488 psi | 59% | 2297 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 90% | 37,086 psi | 70% | 2428 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 98% | 37,811 psi | 71% | 2510 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 80% | 41,800 psi | 79% | 2530 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 30,385 psi | 57% | 2343 fps | 95.3% |
| Shooters World Precision | <<locked>> | 92% | 37,173 psi | 70% | 2454 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 37,188 psi | 70% | 2398 fps | 95% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 39,030 psi | 74% | 2487 fps | 98.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 37,086 psi | 70% | 2418 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 41,394 psi | 78% | 2543 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 30,414 psi | 57% | 2228 fps | 95.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 26,266 psi | 50% | 2142 fps | 95.4% |
| Somchem S321 | <<locked>> | 82% | 34,969 psi | 66% | 2415 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 29,762 psi | 56% | 2234 fps | 96.7% |
| Somchem S341 | <<locked>> | 92% | 42,786 psi | 81% | 2552 fps | 95.5% |
| Somchem S355 | <<locked>> | 98% | 39,653 psi | 75% | 2526 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 43,700 psi | 83% | 2441 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 34,737 psi | 66% | 2326 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 80% | 30,255 psi | 57% | 2241 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 80% | 25,193 psi | 48% | 2192 fps | 97.1% |
| Vihtavuori N140 | <<locked>> | 82% | 28,587 psi | 54% | 2247 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 96% | 35,752 psi | 68% | 2425 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 86% | 37,434 psi | 71% | 2438 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 84% | 29,037 psi | 55% | 2274 fps | 95.3% |
| Winchester 748 | <<locked>> | 84% | 33,707 psi | 64% | 2418 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 92% | 40,437 psi | 76% | 2543 fps | 95.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 78 powders for .303 British loaded with the .312 | 160gr | Atomic 29 HP. ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,746 fps; across all powders the maximum-charge window runs from 1,601 fps to 2,746 fps. Accurate 2495 gives the best case fill at 100 %, and 78 of the 78 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (365 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.312" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, ADI AR 2208 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Power Pro 1200-R, Hodgdon BL-C2, Hodgdon LEVERevolution rank at the top here: for .303 British with the .312 | 160gr | Atomic 29 HP they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.