Load Specifications
Load data in caliber .300 PRC with .308 | 140gr | Peregrine VLR-5 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, Alliant Reloder-16 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.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 56,579 psi | 87% | 3150 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 58,726 psi | 90% | 3225 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,460 psi | 81% | 3186 fps | 98.7% |
| Accurate 4064 | <<locked>> | 86% | 57,043 psi | 88% | 3209 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 58,682 psi | 90% | 3320 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 56,231 psi | 87% | 3241 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,740 psi | 89% | 3251 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,202 psi | 86% | 3304 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 58,523 psi | 90% | 3241 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 57,435 psi | 88% | 3383 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 58,508 psi | 90% | 3271 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 58,798 psi | 90% | 3297 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,680 psi | 86% | 3327 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 57,145 psi | 88% | 3353 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,288 psi | 85% | 3284 fps | 97.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,605 psi | 81% | 3278 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,516 psi | 76% | 3212 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,062 psi | 66% | 3104 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,609 psi | 89% | 3428 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,608 psi | 87% | 3258 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 55,608 psi | 86% | 3232 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,605 psi | 81% | 3278 fps | 96.7% |
| Bofors RP7 | <<locked>> | 90% | 55,158 psi | 85% | 3209 fps | 97.9% |
| Hodgdon BL-C2 | <<locked>> | 82% | 58,813 psi | 90% | 3271 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 56,159 psi | 86% | 3245 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 57,130 psi | 88% | 3314 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 90% | 56,913 psi | 88% | 3274 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 82% | 56,884 psi | 88% | 3251 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,869 psi | 86% | 3241 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,638 psi | 89% | 3294 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 58,117 psi | 89% | 3360 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,027 psi | 55% | 2060 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 58,160 psi | 89% | 3255 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,711 psi | 89% | 3235 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 57,087 psi | 88% | 3232 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,405 psi | 87% | 3209 fps | 98.5% |
| IMR 4350 | <<locked>> | 94% | 56,275 psi | 87% | 3238 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,000 psi | 88% | 3241 fps | 98.6% |
| IMR 4831 | <<locked>> | 94% | 55,085 psi | 85% | 3248 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 56,565 psi | 87% | 3271 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 58,523 psi | 90% | 3241 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,739 psi | 87% | 3212 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 58,711 psi | 90% | 3219 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,174 psi | 88% | 3222 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,826 psi | 87% | 3235 fps | 99.4% |
| Lovex S070 | <<locked>> | 94% | 58,334 psi | 90% | 3278 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,381 psi | 67% | 3012 fps | 96.8% |
| Norma 201 | <<locked>> | 84% | 58,494 psi | 90% | 3238 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,695 psi | 86% | 3179 fps | 100% |
| Norma 203B | <<locked>> | 86% | 58,015 psi | 89% | 3281 fps | 100% |
| Norma 204 | <<locked>> | 94% | 57,406 psi | 88% | 3297 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 56,115 psi | 86% | 3376 fps | 98.6% |
| Norma URP | <<locked>> | 94% | 57,188 psi | 88% | 3304 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 55,376 psi | 85% | 3248 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 56,101 psi | 86% | 3297 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,680 psi | 56% | 2110 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,289 psi | 87% | 3228 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,985 psi | 86% | 3310 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,550 psi | 87% | 3350 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 58,624 psi | 90% | 3343 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,537 psi | 89% | 3379 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 55,608 psi | 86% | 3182 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,680 psi | 86% | 3225 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,754 psi | 89% | 3271 fps | 96.3% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 58,334 psi | 90% | 3333 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 55,158 psi | 85% | 3209 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,826 psi | 87% | 3235 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,739 psi | 87% | 3212 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,174 psi | 88% | 3222 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 58,334 psi | 90% | 3278 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,696 psi | 89% | 3291 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,856 psi | 89% | 3245 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 58,581 psi | 90% | 3268 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,782 psi | 86% | 3114 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,927 psi | 88% | 3110 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,768 psi | 87% | 3182 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,827 psi | 89% | 3330 fps | 97.7% |
| Somchem S335 | <<locked>> | 82% | 55,434 psi | 85% | 3107 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,551 psi | 89% | 3228 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,753 psi | 86% | 3222 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 56,623 psi | 87% | 3307 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,042 psi | 85% | 3241 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 82% | 56,304 psi | 87% | 3094 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,811 psi | 86% | 3140 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,434 psi | 87% | 3156 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,261 psi | 88% | 3199 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,796 psi | 86% | 3241 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,821 psi | 78% | 3143 fps | 96.7% |
| Vihtavuori N540 | <<locked>> | 86% | 58,291 psi | 90% | 3202 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 58,523 psi | 90% | 3301 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,405 psi | 85% | 3301 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,767 psi | 86% | 3205 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,334 psi | 88% | 3320 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,759 psi | 69% | 3258 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,085 psi | 85% | 3215 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,593 psi | 86% | 3238 fps | 97% |
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% | 49,385 psi | 76% | 3038 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,921 psi | 74% | 3031 fps | 96.1% |
| Accurate 3100 | <<locked>> | 92% | 39,595 psi | 61% | 2927 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 46,818 psi | 72% | 3041 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,447 psi | 55% | 2851 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 52,736 psi | 81% | 3179 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,788 psi | 69% | 3012 fps | 99% |
| ADI AR 2209 | <<locked>> | 94% | 48,936 psi | 75% | 3166 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,911 psi | 84% | 3182 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,545 psi | 76% | 3241 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,078 psi | 69% | 3035 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,240 psi | 74% | 3110 fps | 99.5% |
| Alliant Reloder-16 | 67.1 gr | 80% | 34,925 psi | 54% | 2867 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,755 psi | 61% | 3018 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,486 psi | 75% | 3153 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 48,950 psi | 75% | 3205 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 86% | 30,908 psi | 48% | 2762 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 96% | 37,739 psi | 58% | 2969 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 88% | 36,303 psi | 56% | 2972 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,910 psi | 81% | 3192 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 45,281 psi | 70% | 3045 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 48,950 psi | 75% | 3205 fps | 95.7% |
| Bofors RP7 | <<locked>> | 84% | 45,440 psi | 70% | 3018 fps | 95.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 54,955 psi | 85% | 3212 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,759 psi | 70% | 3051 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 43,526 psi | 67% | 3048 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 84% | 46,572 psi | 72% | 3074 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 53,345 psi | 82% | 3192 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,401 psi | 50% | 2753 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,183 psi | 77% | 3166 fps | 100% |
| Hodgdon Superformance | 80.2 gr | 84% | 42,801 psi | 66% | 3058 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,818 psi | 41% | 1844 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,126 psi | 79% | 3136 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,940 psi | 83% | 3179 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,094 psi | 72% | 3051 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,501 psi | 76% | 3081 fps | 97.3% |
| IMR 4350 | <<locked>> | 86% | 43,526 psi | 67% | 2992 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,466 psi | 64% | 2930 fps | 95% |
| IMR 4831 | <<locked>> | 80% | 34,316 psi | 53% | 2805 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 49,472 psi | 76% | 3146 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 54,911 psi | 84% | 3182 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,939 psi | 81% | 3153 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,735 psi | 80% | 3104 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 47,079 psi | 72% | 3048 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,754 psi | 60% | 2867 fps | 95.7% |
| Lovex S070 | <<locked>> | 84% | 42,264 psi | 65% | 2966 fps | 95.6% |
| Lovex S071 | <<locked>> | 96% | 37,826 psi | 58% | 2884 fps | 95% |
| Norma 201 | <<locked>> | 80% | 51,358 psi | 79% | 3120 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,185 psi | 80% | 3123 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,572 psi | 73% | 3097 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 49,995 psi | 77% | 3159 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 41,945 psi | 65% | 3084 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 35,607 psi | 55% | 2854 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 48,051 psi | 74% | 3117 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 39,726 psi | 61% | 2966 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,311 psi | 42% | 1890 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,963 psi | 71% | 3035 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,301 psi | 80% | 3245 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,322 psi | 65% | 3087 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,418 psi | 54% | 2871 fps | 95.5% |
| ReloadSwiss RS 70 | 75.2 gr | 82% | 37,188 psi | 57% | 2943 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 48,820 psi | 75% | 3064 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,511 psi | 65% | 2979 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 96% | 54,070 psi | 83% | 3205 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 94% | 47,529 psi | 73% | 3133 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 84% | 45,440 psi | 70% | 3018 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,754 psi | 60% | 2867 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,939 psi | 81% | 3153 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,079 psi | 72% | 3048 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 42,264 psi | 65% | 2966 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,932 psi | 68% | 3038 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,795 psi | 83% | 3179 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,459 psi | 79% | 3150 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,402 psi | 81% | 3061 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,164 psi | 68% | 2904 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,683 psi | 63% | 2867 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 47,094 psi | 72% | 3127 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 52,040 psi | 80% | 3051 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,766 psi | 83% | 3169 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,902 psi | 66% | 2979 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 31,908 psi | 49% | 2795 fps | 98% |
| Somchem S385 | <<locked>> | 92% | 44,933 psi | 69% | 3045 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 52,982 psi | 82% | 3045 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,153 psi | 76% | 3038 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,559 psi | 76% | 3048 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,060 psi | 63% | 2907 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 36,941 psi | 57% | 2858 fps | 96.4% |
| Vihtavuori N165 | <<locked>> | 98% | 47,485 psi | 73% | 3081 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 47,848 psi | 74% | 3035 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,463 psi | 56% | 2854 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 84% | 31,778 psi | 49% | 2785 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,477 psi | 56% | 2828 fps | 98.5% |
| Winchester 760 | <<locked>> | 84% | 43,526 psi | 67% | 3048 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 29,298 psi | 45% | 2792 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,488 psi | 79% | 3153 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 48,109 psi | 74% | 3100 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 111 powders for .300 PRC loaded with the .308 | 140gr | Peregrine VLR-5. Alliant Reloder-26 delivers the highest muzzle velocity at 3,428 fps; across all powders the maximum-charge window runs from 2,060 fps to 3,428 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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, Alliant Reloder-16, Hodgdon Superformance rank at the top here: for .300 PRC with the .308 | 140gr | Peregrine VLR-5 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, Hodgdon H1000, Hodgdon Retumbo 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.