Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 130gr | Barnes TSX BT bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, ReloadSwiss RS 60 and Hodgdon Superformance.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 54,969 psi | 86% | 3248 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,334 psi | 90% | 3317 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,952 psi | 80% | 3268 fps | 98.1% |
| Accurate 4064 | <<locked>> | 86% | 55,347 psi | 87% | 3304 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,884 psi | 89% | 3409 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 82% | 55,042 psi | 86% | 3340 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 88% | 56,391 psi | 88% | 3343 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 54,708 psi | 86% | 3386 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,319 psi | 90% | 3343 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,782 psi | 87% | 3478 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,549 psi | 85% | 3376 fps | 96.3% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,549 psi | 85% | 3376 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,956 psi | 89% | 3369 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,276 psi | 90% | 3396 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,638 psi | 90% | 3478 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,579 psi | 87% | 3451 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3435 fps | 97% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,964 psi | 75% | 3294 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,742 psi | 65% | 3173 fps | 96.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,753 psi | 87% | 3514 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,216 psi | 87% | 3353 fps | 99.7% |
| Bofors RP3 | <<locked>> | 86% | 54,027 psi | 85% | 3320 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 57,406 psi | 90% | 3360 fps | 97.8% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,464 psi | 90% | 3369 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 54,824 psi | 86% | 3340 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 92% | 55,492 psi | 87% | 3402 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 90% | 55,419 psi | 87% | 3363 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 82% | 55,651 psi | 87% | 3353 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,288 psi | 85% | 3333 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,159 psi | 88% | 3389 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,434 psi | 88% | 3445 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,969 psi | 56% | 2152 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,884 psi | 89% | 3356 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,028 psi | 88% | 3337 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,782 psi | 87% | 3330 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,187 psi | 86% | 3304 fps | 97.9% |
| IMR 4350 | <<locked>> | 94% | 54,868 psi | 86% | 3327 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,724 psi | 87% | 3333 fps | 98% |
| IMR 4831 | <<locked>> | 96% | 57,348 psi | 90% | 3399 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 55,013 psi | 86% | 3366 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 57,319 psi | 90% | 3343 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,288 psi | 87% | 3310 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,421 psi | 90% | 3317 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,651 psi | 87% | 3317 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,405 psi | 87% | 3323 fps | 99% |
| Lovex S070 | <<locked>> | 94% | 56,898 psi | 89% | 3369 fps | 98.4% |
| Norma 201 | <<locked>> | 84% | 57,043 psi | 89% | 3337 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,375 psi | 85% | 3281 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,521 psi | 89% | 3379 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,898 psi | 88% | 3383 fps | 96.4% |
| Norma MRPᴾ | <<locked>> | 100% | 54,462 psi | 85% | 3458 fps | 97.9% |
| Norma URP | <<locked>> | 94% | 55,637 psi | 87% | 3396 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 84% | 53,882 psi | 84% | 3343 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 94% | 54,578 psi | 86% | 3383 fps | 98.6% |
| Ramshot TAC | <<locked>> | 82% | 57,580 psi | 90% | 3360 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 57,682 psi | 90% | 3383 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,390 psi | 57% | 2198 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,911 psi | 86% | 3317 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,418 psi | 85% | 3406 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,940 psi | 86% | 3445 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,101 psi | 89% | 3432 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,782 psi | 87% | 3465 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 57,421 psi | 90% | 3314 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 54,288 psi | 85% | 3281 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,056 psi | 85% | 3317 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,565 psi | 89% | 3415 fps | 97% |
| Rottweil R 907 | <<locked>> | 92% | 57,406 psi | 90% | 3360 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,405 psi | 87% | 3323 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,288 psi | 87% | 3310 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,651 psi | 87% | 3317 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,898 psi | 89% | 3369 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,130 psi | 88% | 3386 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,463 psi | 88% | 3340 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,305 psi | 90% | 3366 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,491 psi | 85% | 3212 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,535 psi | 87% | 3212 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,506 psi | 87% | 3271 fps | 98% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,072 psi | 88% | 3409 fps | 96.8% |
| Somchem S335 | <<locked>> | 84% | 57,667 psi | 90% | 3258 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,202 psi | 88% | 3327 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,273 psi | 85% | 3314 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,737 psi | 86% | 3396 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,464 psi | 90% | 3392 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 82% | 55,056 psi | 86% | 3196 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,447 psi | 85% | 3241 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,998 psi | 86% | 3255 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,854 psi | 88% | 3294 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,143 psi | 85% | 3327 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 86% | 57,014 psi | 89% | 3304 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,087 psi | 89% | 3396 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,606 psi | 84% | 3386 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,215 psi | 85% | 3294 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,753 psi | 87% | 3406 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,279 psi | 68% | 3330 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,580 psi | 90% | 3376 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,969 psi | 85% | 3317 fps | 96.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 47,921 psi | 75% | 3133 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,833 psi | 73% | 3117 fps | 95.3% |
| Accurate 3100 | <<locked>> | 94% | 41,060 psi | 64% | 3061 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 45,397 psi | 71% | 3130 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 36,927 psi | 58% | 2995 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 51,532 psi | 81% | 3278 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 43,642 psi | 68% | 3097 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 96% | 51,053 psi | 80% | 3314 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,693 psi | 84% | 3284 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,109 psi | 75% | 3327 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 51,126 psi | 80% | 3314 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 51,126 psi | 80% | 3314 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,801 psi | 69% | 3120 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,992 psi | 74% | 3199 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 82% | 36,347 psi | 57% | 3012 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,580 psi | 60% | 3094 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 96% | 50,415 psi | 79% | 3301 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 88% | 32,010 psi | 50% | 2897 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 39,160 psi | 61% | 3104 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 90% | 37,811 psi | 59% | 3117 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,532 psi | 81% | 3284 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 44,005 psi | 69% | 3130 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 47,340 psi | 74% | 3166 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,548 psi | 84% | 3307 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,498 psi | 70% | 3133 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 45,237 psi | 71% | 3196 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 86% | 48,501 psi | 76% | 3225 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 52,083 psi | 82% | 3291 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,372 psi | 49% | 2825 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,675 psi | 76% | 3255 fps | 99.9% |
| Hodgdon Superformance | 84.5 gr | 86% | 44,860 psi | 70% | 3212 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,716 psi | 42% | 1929 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,951 psi | 78% | 3232 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 52,446 psi | 82% | 3278 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,876 psi | 72% | 3140 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,399 psi | 76% | 3166 fps | 96.5% |
| IMR 4350 | <<locked>> | 88% | 45,281 psi | 71% | 3136 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,948 psi | 72% | 3140 fps | 95.8% |
| IMR 4831 | <<locked>> | 82% | 35,578 psi | 56% | 2943 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 48,225 psi | 76% | 3238 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 53,693 psi | 84% | 3284 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,430 psi | 81% | 3245 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,734 psi | 80% | 3199 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 46,006 psi | 72% | 3140 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 40,321 psi | 63% | 3012 fps | 95.7% |
| Lovex S070 | <<locked>> | 86% | 43,918 psi | 69% | 3110 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 50,067 psi | 78% | 3212 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,807 psi | 80% | 3219 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,369 psi | 73% | 3186 fps | 99.3% |
| Norma 204 | <<locked>> | 92% | 52,112 psi | 82% | 3314 fps | 95.5% |
| Norma MRP | <<locked>> | 94% | 43,671 psi | 68% | 3228 fps | 95% |
| Norma URP | <<locked>> | 82% | 36,970 psi | 58% | 2995 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 46,717 psi | 73% | 3205 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 41,365 psi | 65% | 3110 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 53,809 psi | 84% | 3294 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,838 psi | 84% | 3317 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,021 psi | 42% | 1972 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,701 psi | 70% | 3114 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,749 psi | 80% | 3333 fps | 99.5% |
| ReloadSwiss RS 60 | 74.4 gr | 80% | 41,075 psi | 64% | 3169 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 36,796 psi | 58% | 3009 fps | 95.4% |
| ReloadSwiss RS 70 | 79.3 gr | 84% | 38,914 psi | 61% | 3091 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 53,954 psi | 85% | 3258 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,601 psi | 75% | 3156 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 41,205 psi | 65% | 3061 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 96% | 49,298 psi | 77% | 3278 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 86% | 47,340 psi | 74% | 3166 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 40,321 psi | 63% | 3012 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,430 psi | 81% | 3245 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,006 psi | 72% | 3140 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 43,918 psi | 69% | 3110 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,641 psi | 67% | 3123 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,605 psi | 82% | 3271 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,096 psi | 79% | 3238 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,097 psi | 80% | 3156 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,975 psi | 67% | 2992 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 45,382 psi | 71% | 3074 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 48,834 psi | 77% | 3271 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 50,807 psi | 80% | 3150 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,402 psi | 82% | 3261 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 41,698 psi | 65% | 3064 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 30,864 psi | 48% | 2864 fps | 97% |
| Somchem S385 | <<locked>> | 94% | 46,731 psi | 73% | 3189 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 51,619 psi | 81% | 3143 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,732 psi | 75% | 3130 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,240 psi | 76% | 3143 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,856 psi | 62% | 2989 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 35,882 psi | 56% | 2933 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 46,630 psi | 73% | 3127 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 37,869 psi | 59% | 2995 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 88% | 35,418 psi | 56% | 2986 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,447 psi | 56% | 2904 fps | 97.7% |
| Winchester 760 | <<locked>> | 86% | 45,411 psi | 71% | 3199 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 90% | 30,429 psi | 48% | 2927 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,995 psi | 78% | 3241 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 98% | 50,183 psi | 79% | 3245 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 96 powders for .300 Norma Mag. loaded with the .308 | 130gr | Barnes TSX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,514 fps; across all powders the maximum-charge window runs from 2,152 fps to 3,514 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-19, Alliant Reloder-23 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, ReloadSwiss RS 60, Hodgdon Superformance rank at the top here: for .300 Norma Mag. with the .308 | 130gr | Barnes TSX BT 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.