Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 88gr | Inceptor SRR bullet and 72 powders. The key underlying parameters are shown in the table above.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 82% | 55,535 psi | 89% | 3629 fps | 100% |
| Accurate 2015 | <<locked>> | 94% | 55,303 psi | 89% | 3698 fps | 100% |
| Accurate 2460 | <<locked>> | 90% | 54,215 psi | 87% | 3701 fps | 99.1% |
| Accurate 2495ᴾ | <<locked>> | 100% | 55,288 psi | 89% | 3737 fps | 100% |
| Accurate 2520 | <<locked>> | 94% | 55,956 psi | 90% | 3766 fps | 99.1% |
| Accurate 4064ᴾ | <<locked>> | 100% | 51,082 psi | 82% | 3691 fps | 99.2% |
| Accurate LT-30 | <<locked>> | 88% | 56,434 psi | 90% | 3661 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 86% | 53,345 psi | 86% | 3615 fps | 98.7% |
| ADI AR 2206H | <<locked>> | 96% | 54,839 psi | 88% | 3753 fps | 96.2% |
| ADI AR 2207 | <<locked>> | 84% | 53,592 psi | 86% | 3658 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 52,939 psi | 85% | 3720 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 94% | 54,215 psi | 87% | 3714 fps | 97.4% |
| Alliant AR-Comp | <<locked>> | 96% | 56,376 psi | 90% | 3796 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 90% | 54,926 psi | 88% | 3848 fps | 96.8% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 51,024 psi | 82% | 3684 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 90% | 55,056 psi | 88% | 3730 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 55,782 psi | 89% | 3780 fps | 95.8% |
| Alliant Reloder-7 | <<locked>> | 84% | 54,897 psi | 88% | 3668 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 55,898 psi | 90% | 3632 fps | 100% |
| Bofors RP3ᴾ | <<locked>> | 100% | 51,242 psi | 82% | 3694 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 92% | 53,461 psi | 86% | 3658 fps | 97.8% |
| Hodgdon BL-C2 | <<locked>> | 94% | 53,055 psi | 85% | 3730 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 90% | 54,955 psi | 88% | 3760 fps | 99.7% |
| Hodgdon H335 | <<locked>> | 88% | 52,881 psi | 85% | 3707 fps | 99.1% |
| Hodgdon H4198 | <<locked>> | 84% | 54,795 psi | 88% | 3668 fps | 99.6% |
| Hodgdon H4895 | <<locked>> | 96% | 55,230 psi | 89% | 3770 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 53,882 psi | 86% | 3783 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,069 psi | 53% | 2398 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 53,693 psi | 86% | 3714 fps | 96.5% |
| IMR 3031 | <<locked>> | 96% | 53,287 psi | 85% | 3783 fps | 99.9% |
| IMR 4198 | <<locked>> | 90% | 55,883 psi | 90% | 3707 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 53,534 psi | 86% | 3760 fps | 96% |
| IMR 8208 XBR | <<locked>> | 94% | 54,215 psi | 87% | 3714 fps | 97.4% |
| Lovex D073.4 | <<locked>> | 84% | 54,186 psi | 87% | 3724 fps | 98.6% |
| Lovex D073.5 | <<locked>> | 90% | 54,447 psi | 87% | 3701 fps | 98.3% |
| Lovex D073.6 | <<locked>> | 96% | 53,301 psi | 85% | 3727 fps | 98.7% |
| Lovex S053 | <<locked>> | 82% | 56,173 psi | 90% | 3606 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 55,579 psi | 89% | 3684 fps | 96.4% |
| Lovex S062ᴾ | <<locked>> | 100% | 54,128 psi | 87% | 3717 fps | 97.5% |
| Norma 200 | <<locked>> | 86% | 55,013 psi | 88% | 3701 fps | 100% |
| Norma 201 | <<locked>> | 96% | 53,243 psi | 85% | 3694 fps | 97.3% |
| Norma 202 | <<locked>> | 96% | 53,664 psi | 86% | 3720 fps | 99.2% |
| Norma 203Bᴾ | <<locked>> | 100% | 54,766 psi | 88% | 3766 fps | 96.3% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 55,956 psi | 90% | 3789 fps | 96.3% |
| Ramshot Wild Boar | <<locked>> | 94% | 54,302 psi | 87% | 3734 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,112 psi | 53% | 2454 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 54,143 psi | 87% | 3717 fps | 98.5% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 49,052 psi | 79% | 3734 fps | 97.7% |
| Rottweil R 901 | <<locked>> | 94% | 53,693 psi | 86% | 3701 fps | 99% |
| Rottweil R 902 | <<locked>> | 98% | 53,447 psi | 86% | 3681 fps | 97.3% |
| Shooters World AR Plus | <<locked>> | 84% | 54,186 psi | 87% | 3724 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 96% | 53,301 psi | 85% | 3727 fps | 98.7% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 54,128 psi | 87% | 3717 fps | 97.5% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 54,810 psi | 88% | 3675 fps | 97.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 56,159 psi | 90% | 3412 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 53,403 psi | 86% | 3717 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 56,333 psi | 90% | 3757 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 53,577 psi | 86% | 3707 fps | 95.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 55,999 psi | 90% | 3671 fps | 99.4% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 52,112 psi | 84% | 3589 fps | 99.6% |
| Somchem S321 | <<locked>> | 92% | 56,173 psi | 90% | 3763 fps | 98.1% |
| Somchem S335 | <<locked>> | 96% | 54,766 psi | 88% | 3658 fps | 99.7% |
| Vihtavuori N120 | <<locked>> | 84% | 53,505 psi | 86% | 3596 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 55,666 psi | 89% | 3665 fps | 100% |
| Vihtavuori N133 | <<locked>> | 96% | 55,535 psi | 89% | 3668 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 55,463 psi | 89% | 3743 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 54,360 psi | 87% | 3691 fps | 99.5% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 46,818 psi | 75% | 3540 fps | 96.4% |
| Vihtavuori N530 | <<locked>> | 94% | 55,158 psi | 88% | 3720 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 98% | 52,837 psi | 85% | 3671 fps | 99.1% |
| Winchester 748 | <<locked>> | 94% | 53,766 psi | 86% | 3763 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 96% | 53,127 psi | 85% | 3714 fps | 96.5% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 51,895 psi | 83% | 3566 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 34,621 psi | 56% | 3238 fps | 97.4% |
| Accurate 2460 | <<locked>> | 80% | 37,869 psi | 61% | 3333 fps | 95.4% |
| Accurate 2495 | <<locked>> | 82% | 28,906 psi | 46% | 3107 fps | 95.4% |
| Accurate 2520 | <<locked>> | 84% | 38,653 psi | 62% | 3386 fps | 95.2% |
| Accurate 4064 | <<locked>> | 90% | 36,201 psi | 58% | 3343 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 43,714 psi | 70% | 3409 fps | 98.5% |
| Accurate LT-32 | <<locked>> | 80% | 44,048 psi | 71% | 3419 fps | 96.8% |
| ADI AR 2206H | <<locked>> | 94% | 51,198 psi | 82% | 3678 fps | 95.3% |
| ADI AR 2207 | <<locked>> | 80% | 47,123 psi | 76% | 3537 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 42,656 psi | 68% | 3501 fps | 98% |
| ADI Benchmark 8208 | <<locked>> | 88% | 44,599 psi | 72% | 3507 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 32,068 psi | 51% | 3261 fps | 98.9% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 47,834 psi | 77% | 3694 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 47,747 psi | 77% | 3615 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 39,856 psi | 64% | 3412 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 98% | 52,257 psi | 84% | 3711 fps | 95% |
| Alliant Reloder-7 | <<locked>> | 80% | 48,254 psi | 77% | 3543 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 42,786 psi | 69% | 3373 fps | 98.6% |
| Bofors RP3 | <<locked>> | 98% | 47,572 psi | 76% | 3615 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 86% | 44,193 psi | 71% | 3455 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 88% | 42,728 psi | 69% | 3507 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 80% | 38,696 psi | 62% | 3402 fps | 97% |
| Hodgdon H335 | <<locked>> | 80% | 39,494 psi | 63% | 3406 fps | 96.2% |
| Hodgdon H4198 | <<locked>> | 80% | 48,153 psi | 77% | 3533 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 92% | 48,385 psi | 78% | 3629 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 46,934 psi | 75% | 3635 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,294 psi | 39% | 2156 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 50,111 psi | 80% | 3642 fps | 95.6% |
| IMR 3031 | <<locked>> | 82% | 32,706 psi | 52% | 3284 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 41,031 psi | 66% | 3412 fps | 99.9% |
| IMR 4895 | <<locked>> | 96% | 49,951 psi | 80% | 3688 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 88% | 44,599 psi | 72% | 3507 fps | 95% |
| Lovex D073.4 | <<locked>> | 80% | 46,456 psi | 74% | 3566 fps | 97.1% |
| Lovex D073.5 | <<locked>> | 84% | 43,627 psi | 70% | 3474 fps | 95.9% |
| Lovex D073.6 | <<locked>> | 88% | 39,856 psi | 64% | 3428 fps | 95.6% |
| Lovex S053 | <<locked>> | 80% | 52,924 psi | 85% | 3553 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 52,243 psi | 84% | 3619 fps | 95.7% |
| Lovex S062 | <<locked>> | 94% | 44,512 psi | 71% | 3514 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 45,020 psi | 72% | 3510 fps | 100% |
| Norma 201 | <<locked>> | 92% | 46,528 psi | 75% | 3553 fps | 95.7% |
| Norma 202 | <<locked>> | 86% | 38,276 psi | 61% | 3369 fps | 95.8% |
| Norma 203B | <<locked>> | 98% | 51,314 psi | 82% | 3698 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 98% | 52,185 psi | 84% | 3714 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 92% | 50,691 psi | 81% | 3658 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,279 psi | 39% | 2205 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 41,263 psi | 66% | 3432 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 42,540 psi | 68% | 3566 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 84% | 39,117 psi | 63% | 3366 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 94% | 46,934 psi | 75% | 3547 fps | 95.8% |
| Shooters World AR Plus | <<locked>> | 80% | 46,456 psi | 74% | 3566 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 39,856 psi | 64% | 3428 fps | 95.6% |
| Shooters World Precision | <<locked>> | 94% | 44,512 psi | 71% | 3514 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 47,456 psi | 76% | 3524 fps | 95.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 47,703 psi | 76% | 3281 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 43,149 psi | 69% | 3494 fps | 97.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 40,451 psi | 65% | 3425 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 50,038 psi | 80% | 3635 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 37,971 psi | 61% | 3281 fps | 95.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 32,706 psi | 52% | 3136 fps | 95% |
| Somchem S321 | <<locked>> | 86% | 45,295 psi | 73% | 3537 fps | 95.6% |
| Somchem S335 | <<locked>> | 82% | 34,780 psi | 56% | 3205 fps | 95.6% |
| Vihtavuori N120 | <<locked>> | 80% | 47,123 psi | 76% | 3481 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 37,869 psi | 61% | 3294 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 80% | 33,069 psi | 53% | 3166 fps | 96.8% |
| Vihtavuori N135 | <<locked>> | 82% | 30,008 psi | 48% | 3146 fps | 95.8% |
| Vihtavuori N140 | <<locked>> | 86% | 36,114 psi | 58% | 3284 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 98% | 43,714 psi | 70% | 3468 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 88% | 44,788 psi | 72% | 3501 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 88% | 37,521 psi | 60% | 3323 fps | 95.5% |
| Winchester 748 | <<locked>> | 88% | 43,468 psi | 70% | 3540 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 94% | 49,501 psi | 79% | 3642 fps | 95.7% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 91 powders for .300 H&H Mag. loaded with the .308 | 88gr | Inceptor SRR. ReloadSwiss RS 52 delivers the highest muzzle velocity at 3,858 fps; across all powders the maximum-charge window runs from 2,398 fps to 3,858 fps. Accurate 2495 gives the best case fill at 100 %, and 91 of the 91 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 88.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, ADI AR 2208 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. As outliers, ADI AR 2208, Alliant Power Pro 2000-MR, Alliant Reloder-17 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.