Load Specifications
Load data in caliber .300 CR with .308 | 145gr | Frontier RSBT bullet and 61 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>> | 86% | 53,374 psi | 86% | 2638 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 53,577 psi | 86% | 2720 fps | 100% |
| Accurate 2460 | <<locked>> | 98% | 56,144 psi | 90% | 2782 fps | 99.5% |
| Accurate 2495ᴾ | <<locked>> | 100% | 41,655 psi | 67% | 2612 fps | 99.7% |
| Accurate 2520ᴾ | <<locked>> | 100% | 52,591 psi | 84% | 2776 fps | 98.9% |
| Accurate 4064ᴾ | <<locked>> | 100% | 38,725 psi | 62% | 2579 fps | 97.7% |
| Accurate LT-30 | <<locked>> | 92% | 53,766 psi | 86% | 2644 fps | 99.8% |
| Accurate LT-32 | <<locked>> | 92% | 54,273 psi | 87% | 2657 fps | 99% |
| ADI AR 2207 | <<locked>> | 90% | 53,592 psi | 86% | 2684 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 55,811 psi | 89% | 2802 fps | 99.9% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 52,518 psi | 84% | 2736 fps | 97.4% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 49,617 psi | 80% | 2746 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 96% | 52,997 psi | 85% | 2835 fps | 97.1% |
| Alliant Reloder-10x | <<locked>> | 96% | 54,056 psi | 87% | 2743 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 90% | 55,405 psi | 89% | 2697 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 55,651 psi | 89% | 2687 fps | 100% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 55,970 psi | 90% | 2740 fps | 98.4% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 50,067 psi | 80% | 2759 fps | 97.7% |
| Hodgdon H322 | <<locked>> | 96% | 53,650 psi | 86% | 2772 fps | 99.8% |
| Hodgdon H335 | <<locked>> | 96% | 54,998 psi | 88% | 2795 fps | 99.5% |
| Hodgdon H4198 | <<locked>> | 90% | 56,246 psi | 90% | 2697 fps | 99.8% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 49,559 psi | 79% | 2726 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,372 psi | 52% | 1611 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 48,704 psi | 78% | 2687 fps | 95.8% |
| IMR 3031ᴾ | <<locked>> | 100% | 47,195 psi | 76% | 2740 fps | 99.8% |
| IMR 4198 | <<locked>> | 96% | 55,535 psi | 89% | 2713 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 55,956 psi | 90% | 2644 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 52,518 psi | 84% | 2736 fps | 97.4% |
| Lovex D073.4 | <<locked>> | 90% | 53,374 psi | 86% | 2753 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 98% | 56,405 psi | 90% | 2789 fps | 98.7% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 46,644 psi | 75% | 2697 fps | 98.1% |
| Lovex S053 | <<locked>> | 86% | 54,607 psi | 88% | 2595 fps | 100% |
| Lovex S060ᴾ | <<locked>> | 100% | 51,416 psi | 82% | 2661 fps | 95.8% |
| Norma 200 | <<locked>> | 92% | 54,549 psi | 87% | 2726 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 48,370 psi | 78% | 2674 fps | 96.7% |
| Norma 202ᴾ | <<locked>> | 100% | 48,109 psi | 77% | 2694 fps | 98.9% |
| Ramshot Wild Boarᴾ | <<locked>> | 100% | 51,895 psi | 83% | 2759 fps | 95.8% |
| Ramshot X-Terminator | <<locked>> | 98% | 55,376 psi | 89% | 2746 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,401 psi | 52% | 1654 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 55,912 psi | 90% | 2680 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 53,214 psi | 85% | 2746 fps | 98.7% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 52,330 psi | 84% | 2723 fps | 99.2% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 45,426 psi | 73% | 2615 fps | 96% |
| Shooters World AR Plus | <<locked>> | 90% | 53,374 psi | 86% | 2753 fps | 98.8% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 46,644 psi | 75% | 2697 fps | 98.1% |
| Shooters World Tactical Rifle | <<locked>> | 94% | 54,331 psi | 87% | 2713 fps | 97.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 55,187 psi | 88% | 2448 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 55,985 psi | 90% | 2802 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 55,303 psi | 89% | 2753 fps | 100% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 51,677 psi | 83% | 2651 fps | 99.1% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 41,321 psi | 66% | 2503 fps | 98.4% |
| Somchem S321 | <<locked>> | 98% | 54,273 psi | 87% | 2785 fps | 98% |
| Somchem S335ᴾ | <<locked>> | 100% | 50,140 psi | 80% | 2651 fps | 99.5% |
| Vihtavuori N120 | <<locked>> | 90% | 53,664 psi | 86% | 2635 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 54,984 psi | 88% | 2694 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 50,720 psi | 81% | 2648 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 42,598 psi | 68% | 2612 fps | 99.8% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 45,440 psi | 73% | 2625 fps | 98.7% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 53,621 psi | 86% | 2743 fps | 97.6% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 43,758 psi | 70% | 2615 fps | 98% |
| Winchester 748ᴾ | <<locked>> | 100% | 51,053 psi | 82% | 2776 fps | 98.1% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 43,961 psi | 70% | 2500 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 28,631 psi | 46% | 2260 fps | 96.6% |
| Accurate 2460 | <<locked>> | 84% | 35,099 psi | 56% | 2431 fps | 95.7% |
| Accurate 2495 | <<locked>> | 84% | 24,323 psi | 39% | 2224 fps | 95.3% |
| Accurate 2520 | <<locked>> | 88% | 34,679 psi | 56% | 2464 fps | 95% |
| Accurate 4064 | <<locked>> | 94% | 31,865 psi | 51% | 2431 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 37,637 psi | 60% | 2379 fps | 97.8% |
| Accurate LT-32 | <<locked>> | 80% | 38,029 psi | 61% | 2382 fps | 95.9% |
| ADI AR 2207 | <<locked>> | 80% | 39,421 psi | 63% | 2470 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 34,809 psi | 56% | 2441 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 94% | 43,714 psi | 70% | 2592 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 26,382 psi | 42% | 2277 fps | 98.2% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 46,644 psi | 75% | 2730 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 33,112 psi | 53% | 2382 fps | 98.9% |
| Alliant Reloder-7 | <<locked>> | 80% | 40,915 psi | 66% | 2477 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 35,636 psi | 57% | 2362 fps | 97.6% |
| Hodgdon Benchmark | <<locked>> | 90% | 41,466 psi | 66% | 2503 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 94% | 40,727 psi | 65% | 2602 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 80% | 31,865 psi | 51% | 2369 fps | 95.8% |
| Hodgdon H335 | <<locked>> | 82% | 34,214 psi | 55% | 2431 fps | 95.5% |
| Hodgdon H4198 | <<locked>> | 80% | 41,524 psi | 67% | 2464 fps | 98.1% |
| Hodgdon H4895 | <<locked>> | 98% | 46,543 psi | 75% | 2677 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,931 psi | 38% | 1440 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 45,745 psi | 73% | 2638 fps | 95% |
| IMR 3031 | <<locked>> | 84% | 28,514 psi | 46% | 2339 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 34,969 psi | 56% | 2375 fps | 99.7% |
| IMR 4227 | <<locked>> | 80% | 46,847 psi | 75% | 2520 fps | 100% |
| IMR 8208 XBR | <<locked>> | 94% | 43,714 psi | 70% | 2592 fps | 95.5% |
| Lovex D073.4 | <<locked>> | 80% | 37,652 psi | 60% | 2484 fps | 95.7% |
| Lovex D073.5 | <<locked>> | 88% | 39,943 psi | 64% | 2526 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 92% | 35,259 psi | 57% | 2487 fps | 95.2% |
| Lovex S053 | <<locked>> | 80% | 45,919 psi | 74% | 2477 fps | 100% |
| Lovex S060 | <<locked>> | 98% | 48,762 psi | 78% | 2621 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 37,724 psi | 60% | 2461 fps | 99.9% |
| Norma 201 | <<locked>> | 96% | 42,670 psi | 68% | 2575 fps | 95.4% |
| Norma 202 | <<locked>> | 88% | 32,851 psi | 53% | 2402 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 98% | 48,820 psi | 78% | 2710 fps | 95.1% |
| Ramshot X-Terminator | <<locked>> | 96% | 51,764 psi | 83% | 2694 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,815 psi | 38% | 1473 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 46,760 psi | 75% | 2556 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 38,667 psi | 62% | 2497 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 86% | 34,621 psi | 56% | 2402 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 98% | 42,699 psi | 68% | 2569 fps | 95.3% |
| Shooters World AR Plus | <<locked>> | 80% | 37,652 psi | 60% | 2484 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 92% | 35,259 psi | 57% | 2487 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 44,251 psi | 71% | 2556 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 42,627 psi | 68% | 2283 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 35,302 psi | 57% | 2444 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 33,765 psi | 54% | 2385 fps | 97.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 33,736 psi | 54% | 2333 fps | 95.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 30,618 psi | 49% | 2280 fps | 95.3% |
| Somchem S321 | <<locked>> | 90% | 41,336 psi | 66% | 2575 fps | 95.3% |
| Somchem S335 | <<locked>> | 84% | 30,719 psi | 49% | 2287 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 39,581 psi | 63% | 2431 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 31,923 psi | 51% | 2300 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 80% | 27,760 psi | 45% | 2208 fps | 96% |
| Vihtavuori N135 | <<locked>> | 84% | 25,976 psi | 42% | 2241 fps | 95.6% |
| Vihtavuori N140 | <<locked>> | 90% | 33,286 psi | 53% | 2388 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 94% | 43,903 psi | 70% | 2589 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 92% | 33,968 psi | 54% | 2418 fps | 95.3% |
| Winchester 748 | <<locked>> | 92% | 39,305 psi | 63% | 2566 fps | 95.3% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 61 powders for .300 CR loaded with the .308 | 145gr | Frontier RSBT. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 2,835 fps; across all powders the maximum-charge window runs from 1,611 fps to 2,835 fps. Accurate 2015 gives the best case fill at 100 %, and 61 of the 61 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 145.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2495, Accurate 2520 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.