Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 201gr | RWS Kegelspitz bullet and 94 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 31"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 48,167 psi | 87% | 2474 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 47,253 psi | 86% | 2480 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 41,684 psi | 76% | 2507 fps | 98.7% |
| Accurate 4064 | <<locked>> | 86% | 48,544 psi | 88% | 2526 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 47,355 psi | 86% | 2608 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 48,863 psi | 89% | 2552 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 49,603 psi | 90% | 2556 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 49,530 psi | 90% | 2644 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 47,819 psi | 87% | 2664 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 49,545 psi | 90% | 2572 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 47,065 psi | 85% | 2549 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 49,211 psi | 89% | 2664 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 49,617 psi | 90% | 2690 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 48,472 psi | 88% | 2638 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 42,351 psi | 77% | 2582 fps | 96.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,711 psi | 72% | 2536 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 35,215 psi | 64% | 2457 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,367 psi | 81% | 2694 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 47,993 psi | 87% | 2566 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 46,615 psi | 85% | 2543 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 42,351 psi | 77% | 2582 fps | 96.6% |
| Bofors RP7 | <<locked>> | 90% | 47,311 psi | 86% | 2523 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 86% | 47,529 psi | 86% | 2556 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 46,920 psi | 85% | 2608 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 90% | 48,124 psi | 87% | 2575 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 82% | 49,385 psi | 90% | 2562 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 48,776 psi | 89% | 2592 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 48,385 psi | 88% | 2592 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 46,847 psi | 85% | 2638 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,824 psi | 65% | 1568 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 47,166 psi | 86% | 2516 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 49,153 psi | 89% | 2536 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 49,182 psi | 89% | 2536 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 49,008 psi | 89% | 2520 fps | 98.8% |
| IMR 4350 | <<locked>> | 94% | 47,427 psi | 86% | 2552 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 49,008 psi | 89% | 2552 fps | 98.8% |
| IMR 4831 | <<locked>> | 96% | 48,399 psi | 88% | 2605 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 48,269 psi | 88% | 2575 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 49,487 psi | 90% | 2582 fps | 95.9% |
| Lovex D073.6 | <<locked>> | 82% | 48,269 psi | 88% | 2526 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 48,602 psi | 88% | 2484 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 49,110 psi | 89% | 2533 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 48,327 psi | 88% | 2546 fps | 99.5% |
| Lovex S070 | <<locked>> | 94% | 49,037 psi | 89% | 2582 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 34,548 psi | 63% | 2375 fps | 97.1% |
| Norma 201 | <<locked>> | 82% | 47,688 psi | 87% | 2500 fps | 100% |
| Norma 202 | <<locked>> | 82% | 48,254 psi | 88% | 2500 fps | 100% |
| Norma 203B | <<locked>> | 86% | 49,226 psi | 89% | 2582 fps | 100% |
| Norma 204 | <<locked>> | 94% | 47,195 psi | 86% | 2589 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 44,512 psi | 81% | 2657 fps | 98.4% |
| Norma URP | <<locked>> | 94% | 47,036 psi | 85% | 2602 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 49,501 psi | 90% | 2605 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 48,805 psi | 89% | 2648 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,230 psi | 66% | 1604 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 48,008 psi | 87% | 2543 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 47,036 psi | 85% | 2608 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 49,748 psi | 90% | 2687 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 47,065 psi | 85% | 2635 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 46,920 psi | 85% | 2661 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 48,225 psi | 88% | 2500 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 49,777 psi | 90% | 2579 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 48,037 psi | 87% | 2566 fps | 96.3% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 47,108 psi | 85% | 2618 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 47,311 psi | 86% | 2523 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 48,327 psi | 88% | 2546 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 48,269 psi | 88% | 2526 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 49,110 psi | 89% | 2533 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 49,037 psi | 89% | 2582 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 48,124 psi | 87% | 2595 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 49,356 psi | 90% | 2552 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 47,268 psi | 86% | 2530 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 49,081 psi | 89% | 2434 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 49,284 psi | 89% | 2441 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 48,240 psi | 88% | 2500 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 46,673 psi | 85% | 2612 fps | 97.5% |
| Somchem S335 | <<locked>> | 82% | 48,559 psi | 88% | 2438 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 48,878 psi | 89% | 2539 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 47,369 psi | 86% | 2536 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 48,196 psi | 87% | 2648 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 47,892 psi | 87% | 2602 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 82% | 49,385 psi | 90% | 2421 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 47,950 psi | 87% | 2461 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 48,486 psi | 88% | 2477 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 48,225 psi | 88% | 2513 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 49,081 psi | 89% | 2592 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 41,292 psi | 75% | 2474 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 86% | 49,763 psi | 90% | 2523 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 48,327 psi | 88% | 2605 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,830 psi | 80% | 2605 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 49,168 psi | 89% | 2572 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 47,210 psi | 86% | 2612 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,607 psi | 65% | 2569 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 46,789 psi | 85% | 2533 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 44,933 psi | 82% | 2539 fps | 96.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 31"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 42,467 psi | 77% | 2395 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,481 psi | 75% | 2382 fps | 96.7% |
| Accurate 3100 | <<locked>> | 90% | 29,588 psi | 54% | 2264 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 40,190 psi | 73% | 2398 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 29,399 psi | 53% | 2267 fps | 97.1% |
| ADI AR 2206H | <<locked>> | 80% | 45,788 psi | 83% | 2507 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 39,015 psi | 71% | 2379 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 94% | 41,046 psi | 74% | 2497 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,568 psi | 75% | 2556 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,638 psi | 70% | 2398 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,466 psi | 75% | 2457 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,081 psi | 55% | 2280 fps | 97.3% |
| Alliant Reloder-17 | 44 gr | 80% | 33,431 psi | 61% | 2395 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 94% | 40,118 psi | 73% | 2487 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 39,682 psi | 72% | 2530 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 82% | 23,119 psi | 42% | 2113 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 94% | 29,443 psi | 53% | 2306 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 86% | 27,543 psi | 50% | 2310 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,962 psi | 82% | 2520 fps | 99.9% |
| Bofors RP3 | <<locked>> | 80% | 38,479 psi | 70% | 2408 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 39,682 psi | 72% | 2530 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 34,621 psi | 63% | 2287 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 39,088 psi | 71% | 2411 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 82% | 33,968 psi | 62% | 2362 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 82% | 37,202 psi | 68% | 2379 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 46,195 psi | 84% | 2513 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,499 psi | 50% | 2188 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,293 psi | 77% | 2500 fps | 100% |
| Hodgdon Superformance | 48.8 gr | 84% | 35,607 psi | 65% | 2421 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,542 psi | 48% | 1398 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,396 psi | 81% | 2474 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 46,108 psi | 84% | 2493 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,988 psi | 74% | 2405 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,308 psi | 79% | 2425 fps | 97.9% |
| IMR 4350 | <<locked>> | 84% | 34,824 psi | 63% | 2320 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 36,100 psi | 66% | 2320 fps | 96% |
| IMR 4831 | <<locked>> | 80% | 28,689 psi | 52% | 2231 fps | 96.9% |
| IMR 4895 | <<locked>> | 80% | 42,467 psi | 77% | 2484 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 46,615 psi | 85% | 2536 fps | 95.3% |
| Lovex D073.6 | <<locked>> | 80% | 45,107 psi | 82% | 2480 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,774 psi | 83% | 2441 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 40,973 psi | 74% | 2405 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 33,605 psi | 61% | 2274 fps | 96.8% |
| Lovex S070 | <<locked>> | 80% | 31,923 psi | 58% | 2257 fps | 95% |
| Lovex S071 | <<locked>> | 96% | 30,589 psi | 56% | 2287 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 44,889 psi | 81% | 2457 fps | 100% |
| Norma 202 | <<locked>> | 80% | 45,165 psi | 82% | 2457 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,828 psi | 74% | 2448 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 38,856 psi | 71% | 2438 fps | 95% |
| Norma MRP | <<locked>> | 92% | 34,200 psi | 62% | 2444 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 30,081 psi | 55% | 2274 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 80% | 40,306 psi | 73% | 2461 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 31,328 psi | 57% | 2306 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,992 psi | 49% | 1434 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,537 psi | 72% | 2395 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,859 psi | 80% | 2556 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,607 psi | 65% | 2448 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 29,225 psi | 53% | 2283 fps | 96.6% |
| ReloadSwiss RS 70 | 44.6 gr | 80% | 29,341 psi | 53% | 2283 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 42,743 psi | 78% | 2415 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 36,260 psi | 66% | 2359 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 96% | 45,223 psi | 82% | 2523 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 94% | 38,870 psi | 71% | 2470 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 34,621 psi | 63% | 2287 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,605 psi | 61% | 2274 fps | 96.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,107 psi | 82% | 2480 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,973 psi | 74% | 2405 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 31,923 psi | 58% | 2257 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,072 psi | 67% | 2408 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,166 psi | 84% | 2503 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,309 psi | 80% | 2484 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,108 psi | 84% | 2395 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,450 psi | 70% | 2283 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 32,634 psi | 59% | 2221 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 38,537 psi | 70% | 2467 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 45,818 psi | 83% | 2398 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,788 psi | 83% | 2493 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 36,941 psi | 67% | 2362 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 26,890 psi | 49% | 2234 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 34,592 psi | 63% | 2362 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 46,470 psi | 84% | 2382 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,293 psi | 77% | 2382 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,931 psi | 78% | 2398 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,201 psi | 64% | 2300 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 31,270 psi | 57% | 2267 fps | 97.4% |
| Vihtavuori N165 | <<locked>> | 96% | 36,390 psi | 66% | 2379 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 41,147 psi | 75% | 2395 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 30,690 psi | 56% | 2274 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 24,511 psi | 44% | 2178 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,038 psi | 56% | 2247 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 33,968 psi | 62% | 2362 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 86% | 22,960 psi | 42% | 2178 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,801 psi | 79% | 2487 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 39,146 psi | 71% | 2434 fps | 95.2% |
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 108 powders for 7.5 x 55 Swiss loaded with the .308 | 201gr | RWS Kegelspitz. Alliant Reloder-26 delivers the highest muzzle velocity at 2,694 fps; across all powders the maximum-charge window runs from 1,568 fps to 2,694 fps. Accurate 3100 gives the best case fill at 100 %, and 108 of the 108 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 201.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for 7.5 x 55 Swiss with the .308 | 201gr | RWS Kegelspitz they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Hodgdon H1000 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.