
Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 145gr | SUS-TAC HPT bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-16 and Hodgdon H414.
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% | 56,449 psi | 88% | 3077 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,215 psi | 85% | 3077 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,706 psi | 81% | 3107 fps | 98.5% |
| Accurate 4064 | <<locked>> | 86% | 56,550 psi | 89% | 3130 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,638 psi | 90% | 3238 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 55,651 psi | 87% | 3159 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,913 psi | 89% | 3163 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,998 psi | 86% | 3209 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,217 psi | 88% | 3294 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,595 psi | 90% | 3189 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,288 psi | 85% | 3153 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,505 psi | 85% | 3238 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,840 psi | 88% | 3268 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,128 psi | 85% | 3196 fps | 96.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,271 psi | 80% | 3186 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,385 psi | 76% | 3130 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,250 psi | 66% | 3022 fps | 97.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,956 psi | 88% | 3337 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,767 psi | 87% | 3176 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 54,868 psi | 86% | 3146 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,271 psi | 80% | 3186 fps | 96.2% |
| Bofors RP7 | <<locked>> | 90% | 54,534 psi | 85% | 3120 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 86% | 55,463 psi | 87% | 3163 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 92% | 56,101 psi | 88% | 3228 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 90% | 55,898 psi | 88% | 3182 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 82% | 56,246 psi | 88% | 3169 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,897 psi | 86% | 3159 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,637 psi | 89% | 3205 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,623 psi | 89% | 3268 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 57% | 2001 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,363 psi | 90% | 3173 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,971 psi | 89% | 3153 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,318 psi | 88% | 3146 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,608 psi | 87% | 3120 fps | 98.3% |
| IMR 4350 | <<locked>> | 94% | 55,448 psi | 87% | 3156 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,072 psi | 88% | 3153 fps | 98.3% |
| IMR 4831 | <<locked>> | 94% | 54,273 psi | 85% | 3166 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 55,666 psi | 87% | 3186 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,028 psi | 88% | 3130 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,563 psi | 86% | 3081 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,565 psi | 89% | 3143 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,101 psi | 88% | 3150 fps | 99.3% |
| Lovex S070 | <<locked>> | 94% | 57,392 psi | 90% | 3192 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,685 psi | 67% | 2933 fps | 96.5% |
| Norma 201 | <<locked>> | 82% | 54,476 psi | 85% | 3100 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,042 psi | 86% | 3100 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,261 psi | 90% | 3199 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,318 psi | 88% | 3209 fps | 96.9% |
| Norma MRPᴾ | <<locked>> | 100% | 54,607 psi | 86% | 3284 fps | 98.3% |
| Norma URP | <<locked>> | 94% | 56,014 psi | 88% | 3215 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 84% | 54,404 psi | 85% | 3163 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 55,056 psi | 86% | 3215 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,680 psi | 57% | 2044 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,477 psi | 87% | 3143 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,216 psi | 87% | 3225 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,347 psi | 87% | 3264 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,392 psi | 90% | 3255 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,173 psi | 88% | 3287 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 55,100 psi | 86% | 3104 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,926 psi | 86% | 3143 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,695 psi | 89% | 3179 fps | 95.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,898 psi | 89% | 3241 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 90% | 54,534 psi | 85% | 3120 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,101 psi | 88% | 3150 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,028 psi | 88% | 3130 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,565 psi | 89% | 3143 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,392 psi | 90% | 3192 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,637 psi | 89% | 3205 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,145 psi | 90% | 3163 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,201 psi | 85% | 3123 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,303 psi | 87% | 3031 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,159 psi | 88% | 3031 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,072 psi | 88% | 3097 fps | 98.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 3235 fps | 97.3% |
| Somchem S335 | <<locked>> | 82% | 55,071 psi | 86% | 3028 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,753 psi | 89% | 3150 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,911 psi | 86% | 3140 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 55,259 psi | 87% | 3222 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,682 psi | 90% | 3215 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 82% | 55,753 psi | 87% | 3015 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,216 psi | 87% | 3061 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,724 psi | 87% | 3077 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,347 psi | 88% | 3114 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,810 psi | 86% | 3156 fps | 99.7% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,937 psi | 78% | 3064 fps | 96.3% |
| Vihtavuori N540 | <<locked>> | 86% | 57,537 psi | 90% | 3123 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,464 psi | 90% | 3215 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 3215 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,462 psi | 85% | 3120 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,318 psi | 88% | 3232 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,729 psi | 69% | 3169 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,201 psi | 85% | 3130 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,259 psi | 85% | 3146 fps | 96.6% |
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% | 49,516 psi | 78% | 2972 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,500 psi | 74% | 2953 fps | 95.9% |
| Accurate 3100 | <<locked>> | 92% | 39,189 psi | 61% | 2858 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 46,847 psi | 73% | 2972 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,375 psi | 55% | 2789 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 52,286 psi | 82% | 3100 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 44,396 psi | 70% | 2933 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 94% | 48,240 psi | 76% | 3081 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,646 psi | 76% | 3156 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,657 psi | 70% | 2959 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,834 psi | 75% | 3035 fps | 99.4% |
| Alliant Reloder-16 | 63.4 gr | 80% | 34,737 psi | 54% | 2799 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,276 psi | 62% | 2943 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 94% | 47,601 psi | 75% | 3068 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 98% | 47,979 psi | 75% | 3120 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 86% | 30,690 psi | 48% | 2700 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 96% | 37,246 psi | 58% | 2890 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 88% | 35,853 psi | 56% | 2904 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,011 psi | 82% | 3107 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 44,933 psi | 70% | 2969 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 47,979 psi | 75% | 3120 fps | 95.3% |
| Bofors RP7 | <<locked>> | 84% | 45,121 psi | 71% | 2943 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 45,411 psi | 71% | 2976 fps | 98.2% |
| Hodgdon H414 | 70.1 gr | 84% | 42,815 psi | 67% | 2966 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 86% | 49,081 psi | 77% | 3058 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 52,866 psi | 83% | 3114 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,242 psi | 51% | 2690 fps | 96.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,458 psi | 78% | 3084 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 45,411 psi | 71% | 3051 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,919 psi | 42% | 1788 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,560 psi | 79% | 3058 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,287 psi | 84% | 3097 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,673 psi | 73% | 2972 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,950 psi | 77% | 2999 fps | 97.1% |
| IMR 4350 | <<locked>> | 88% | 45,818 psi | 72% | 2972 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 43,787 psi | 69% | 2913 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 34,156 psi | 54% | 2740 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 49,052 psi | 77% | 3068 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 52,533 psi | 82% | 3077 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,285 psi | 80% | 3025 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 46,818 psi | 73% | 2972 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,682 psi | 61% | 2802 fps | 95.6% |
| Lovex S070 | <<locked>> | 84% | 41,916 psi | 66% | 2894 fps | 95.4% |
| Lovex S071 | <<locked>> | 98% | 40,059 psi | 63% | 2874 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 51,140 psi | 80% | 3045 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,634 psi | 81% | 3045 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,195 psi | 74% | 3022 fps | 99.6% |
| Norma 204 | <<locked>> | 90% | 49,008 psi | 77% | 3074 fps | 95.1% |
| Norma MRP | <<locked>> | 94% | 44,237 psi | 69% | 3074 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 35,317 psi | 55% | 2785 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 47,326 psi | 74% | 3038 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 39,320 psi | 62% | 2894 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,485 psi | 43% | 1834 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,498 psi | 71% | 2956 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,459 psi | 81% | 3159 fps | 99.7% |
| ReloadSwiss RS 60 | 68.3 gr | 80% | 41,771 psi | 65% | 3012 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,099 psi | 55% | 2802 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 36,912 psi | 58% | 2871 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 48,733 psi | 76% | 2992 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,293 psi | 66% | 2910 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 96% | 53,142 psi | 83% | 3120 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 96% | 49,792 psi | 78% | 3114 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 84% | 45,121 psi | 71% | 2943 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,682 psi | 61% | 2802 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,533 psi | 82% | 3077 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,818 psi | 73% | 2972 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 41,916 psi | 66% | 2894 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,337 psi | 68% | 2963 fps | 99.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,200 psi | 83% | 3097 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,763 psi | 80% | 3064 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,040 psi | 82% | 2982 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,874 psi | 69% | 2835 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 43,178 psi | 68% | 2858 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 49,342 psi | 77% | 3107 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 51,764 psi | 81% | 2979 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,881 psi | 83% | 3087 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 42,728 psi | 67% | 2913 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 31,720 psi | 50% | 2733 fps | 97.9% |
| Somchem S385 | <<locked>> | 92% | 44,396 psi | 70% | 2969 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 52,533 psi | 82% | 2966 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,791 psi | 76% | 2963 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,081 psi | 77% | 2972 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,770 psi | 64% | 2838 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 36,695 psi | 57% | 2789 fps | 96.2% |
| Vihtavuori N165 | <<locked>> | 98% | 46,557 psi | 73% | 2999 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 47,427 psi | 74% | 2959 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,230 psi | 57% | 2789 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 84% | 31,676 psi | 50% | 2726 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,042 psi | 56% | 2759 fps | 98.3% |
| Winchester 760 | <<locked>> | 84% | 43,004 psi | 67% | 2972 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 29,095 psi | 46% | 2730 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,720 psi | 79% | 3071 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 50,691 psi | 79% | 3081 fps | 95.8% |
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 107 powders for .300 Weath. Mag. loaded with the .308 | 145gr | SUS-TAC HPT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,337 fps; across all powders the maximum-charge window runs from 2,001 fps to 3,337 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 145.0 gr projectile in 0.308" calls for a 1:12.0 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 60, Alliant Reloder-16, Hodgdon H414 rank at the top here: for .300 Weath. Mag. with the .308 | 145gr | SUS-TAC HPT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.