Load Specifications
Load data in caliber .303 Sporting with .312 | 160gr | Peregrine Plainsmaster (VLR-4) bullet and 51 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate 2520, Alliant AR-Comp and Lovex D073.6.
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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Max Load - Barrel Length: 25"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 92% | 40,901 psi | 85% | 2431 fps | 99.8% |
| Accurate 2460 | <<locked>> | 90% | 42,061 psi | 88% | 2474 fps | 98.2% |
| Accurate 2495ᴾ | <<locked>> | 100% | 40,422 psi | 84% | 2497 fps | 99.9% |
| Accurate 2520 | <<locked>> | 96% | 43,033 psi | 90% | 2543 fps | 98.1% |
| Accurate 2520 | <<locked>> | 96% | 43,033 psi | 90% | 2543 fps | 98.1% |
| Accurate 4064ᴾ | <<locked>> | 100% | 37,637 psi | 79% | 2467 fps | 98.1% |
| Accurate LT-30 | <<locked>> | 84% | 41,785 psi | 87% | 2359 fps | 99.1% |
| Accurate LT-32 | <<locked>> | 84% | 42,206 psi | 88% | 2369 fps | 97.7% |
| ADI AR 2207 | <<locked>> | 82% | 41,510 psi | 87% | 2405 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 41,829 psi | 87% | 2487 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 94% | 43,294 psi | 90% | 2487 fps | 96.2% |
| Alliant AR-Comp | <<locked>> | 96% | 42,975 psi | 90% | 2543 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 88% | 41,901 psi | 88% | 2457 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 82% | 42,699 psi | 89% | 2408 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 42,699 psi | 89% | 2398 fps | 99.4% |
| Hodgdon Benchmark | <<locked>> | 90% | 41,118 psi | 86% | 2405 fps | 96.3% |
| Hodgdon BL-C2 | <<locked>> | 96% | 42,888 psi | 90% | 2546 fps | 96.9% |
| Hodgdon H322 | <<locked>> | 92% | 42,525 psi | 89% | 2500 fps | 99.2% |
| Hodgdon H335 | <<locked>> | 86% | 41,046 psi | 86% | 2477 fps | 98.2% |
| Hodgdon H4198 | <<locked>> | 84% | 43,265 psi | 90% | 2398 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,300 psi | 67% | 1535 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 42,018 psi | 88% | 2549 fps | 99.6% |
| IMR 4198 | <<locked>> | 86% | 41,394 psi | 86% | 2402 fps | 100% |
| IMR 8208 XBR | <<locked>> | 94% | 43,294 psi | 90% | 2487 fps | 96.2% |
| Lovex D073.4 | <<locked>> | 84% | 42,438 psi | 89% | 2480 fps | 97.7% |
| Lovex D073.5 | <<locked>> | 90% | 41,974 psi | 88% | 2474 fps | 97% |
| Lovex D073.6 | <<locked>> | 98% | 42,627 psi | 89% | 2536 fps | 98% |
| Lovex S062ᴾ | <<locked>> | 100% | 41,640 psi | 87% | 2480 fps | 96% |
| Norma 200 | <<locked>> | 84% | 41,452 psi | 87% | 2431 fps | 100% |
| Norma 201 | <<locked>> | 96% | 41,597 psi | 87% | 2464 fps | 95.9% |
| Norma 202 | <<locked>> | 96% | 41,524 psi | 87% | 2487 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,966 psi | 67% | 1568 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 43,236 psi | 90% | 2490 fps | 97.7% |
| Rottweil R 901 | <<locked>> | 94% | 42,786 psi | 89% | 2474 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 98% | 41,698 psi | 87% | 2457 fps | 95.9% |
| Shooters World AR Plus | <<locked>> | 84% | 42,438 psi | 89% | 2480 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 98% | 42,627 psi | 89% | 2536 fps | 98% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 41,640 psi | 87% | 2480 fps | 96% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 42,264 psi | 88% | 2490 fps | 98.3% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 42,598 psi | 89% | 2461 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 42,540 psi | 89% | 2411 fps | 98.3% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 40,915 psi | 85% | 2402 fps | 98.9% |
| Somchem S321 | <<locked>> | 90% | 40,596 psi | 85% | 2467 fps | 95.9% |
| Somchem S335 | <<locked>> | 94% | 41,075 psi | 86% | 2411 fps | 98.8% |
| Vihtavuori N120 | <<locked>> | 82% | 41,713 psi | 87% | 2365 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 42,612 psi | 89% | 2415 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 42,018 psi | 88% | 2418 fps | 99.8% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 42,105 psi | 88% | 2507 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 98% | 41,974 psi | 88% | 2470 fps | 98.7% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 43,308 psi | 90% | 2510 fps | 98.5% |
| Winchester 748 | <<locked>> | 92% | 42,192 psi | 88% | 2526 fps | 96.9% |
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% | 27,818 psi | 58% | 2162 fps | 97.1% |
| Accurate 2460 | <<locked>> | 82% | 31,865 psi | 67% | 2277 fps | 95.4% |
| Accurate 2495 | <<locked>> | 84% | 23,090 psi | 48% | 2116 fps | 95.7% |
| Accurate 2520 | 36.3 gr | 88% | 32,300 psi | 67% | 2339 fps | 95.1% |
| Accurate 2520 | 36.3 gr | 88% | 32,300 psi | 67% | 2339 fps | 95.1% |
| Accurate 4064 | <<locked>> | 92% | 28,776 psi | 60% | 2277 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 36,912 psi | 77% | 2274 fps | 98.2% |
| Accurate LT-32 | <<locked>> | 80% | 37,289 psi | 78% | 2277 fps | 96.5% |
| ADI AR 2207 | <<locked>> | 80% | 38,769 psi | 81% | 2359 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 34,214 psi | 71% | 2339 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 92% | 40,567 psi | 85% | 2441 fps | 95.5% |
| Alliant AR-Comp | 30.3 gr | 80% | 25,773 psi | 54% | 2178 fps | 98.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 32,387 psi | 68% | 2277 fps | 99.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 40,292 psi | 84% | 2369 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 35,201 psi | 74% | 2264 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 88% | 38,580 psi | 81% | 2356 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 92% | 37,246 psi | 78% | 2441 fps | 95.3% |
| Hodgdon H322 | <<locked>> | 80% | 29,124 psi | 61% | 2218 fps | 95.6% |
| Hodgdon H335 | <<locked>> | 80% | 33,199 psi | 69% | 2320 fps | 96.1% |
| Hodgdon H4198 | <<locked>> | 80% | 38,464 psi | 80% | 2313 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,525 psi | 49% | 1365 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 27,108 psi | 57% | 2221 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 34,621 psi | 72% | 2277 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 92% | 40,567 psi | 85% | 2441 fps | 95.5% |
| Lovex D073.4 | <<locked>> | 80% | 36,651 psi | 77% | 2375 fps | 96.2% |
| Lovex D073.5 | <<locked>> | 86% | 36,419 psi | 76% | 2372 fps | 95.5% |
| Lovex D073.6 | 36.3 gr | 90% | 32,300 psi | 67% | 2339 fps | 95.1% |
| Lovex S062 | <<locked>> | 98% | 39,320 psi | 82% | 2438 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 36,506 psi | 76% | 2346 fps | 99.9% |
| Norma 201 | <<locked>> | 94% | 39,276 psi | 82% | 2421 fps | 95.3% |
| Norma 202 | <<locked>> | 86% | 30,197 psi | 63% | 2257 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,380 psi | 49% | 1398 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 35,505 psi | 74% | 2343 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 84% | 31,618 psi | 66% | 2251 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 96% | 39,334 psi | 82% | 2415 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 80% | 36,651 psi | 77% | 2375 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 90% | 32,300 psi | 67% | 2339 fps | 95.1% |
| Shooters World Precision | <<locked>> | 98% | 39,320 psi | 82% | 2438 fps | 95.3% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 34,432 psi | 72% | 2339 fps | 96.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 33,185 psi | 69% | 2283 fps | 98% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 31,067 psi | 65% | 2188 fps | 95.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 28,123 psi | 59% | 2139 fps | 95.2% |
| Somchem S321 | <<locked>> | 88% | 37,753 psi | 79% | 2415 fps | 95.1% |
| Somchem S335 | <<locked>> | 82% | 28,253 psi | 59% | 2146 fps | 95.2% |
| Vihtavuori N120 | <<locked>> | 80% | 38,943 psi | 81% | 2320 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 31,270 psi | 65% | 2201 fps | 98.8% |
| Vihtavuori N133 | <<locked>> | 80% | 27,137 psi | 57% | 2113 fps | 96.6% |
| Vihtavuori N135 | <<locked>> | 82% | 23,685 psi | 49% | 2096 fps | 95.4% |
| Vihtavuori N140 | <<locked>> | 88% | 30,501 psi | 64% | 2241 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 90% | 31,314 psi | 65% | 2277 fps | 95.2% |
| Winchester 748 | <<locked>> | 88% | 36,767 psi | 77% | 2421 fps | 95.3% |
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 51 powders for .303 Sporting loaded with the .312 | 160gr | Peregrine Plainsmaster (VLR-4). IMR 3031 delivers the highest muzzle velocity at 2,549 fps; across all powders the maximum-charge window runs from 1,535 fps to 2,549 fps. Accurate 2495 gives the best case fill at 100 %, and 51 of the 51 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 67–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.312" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, Hodgdon TrailBoss 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. Accurate 2520, Alliant AR-Comp, Lovex D073.6 rank at the top here: for .303 Sporting with the .312 | 160gr | Peregrine Plainsmaster (VLR-4) 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.