Load Specifications
Load data in caliber .300 CR with .308 | 85gr | Lehigh Defense Xtreme Penetrator bullet and 25 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Shooters World Buffalo Rifle, Lovex D060 and ReloadSwiss RS 36.
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>> | 96% | 54,853 psi | 88% | 3425 fps | 98.6% |
| Accurate 5744 | <<locked>> | 82% | 53,751 psi | 86% | 3474 fps | 99.1% |
| Accurate No. 11 FS | <<locked>> | 84% | 53,229 psi | 85% | 3402 fps | 100% |
| ADI APS 450 | <<locked>> | 82% | 54,621 psi | 88% | 2654 fps | 100% |
| ADI AR 2205 | <<locked>> | 88% | 54,041 psi | 87% | 3320 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 51,271 psi | 82% | 3484 fps | 100% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 42,047 psi | 67% | 3317 fps | 96.5% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 54,418 psi | 87% | 3488 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,196 psi | 47% | 2119 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 45,382 psi | 73% | 3333 fps | 98% |
| IMR 4227 | <<locked>> | 94% | 53,403 psi | 86% | 3425 fps | 99.8% |
| Lovex D060 | <<locked>> | 88% | 54,128 psi | 87% | 3481 fps | 99.1% |
| Lovex D063 | <<locked>> | 88% | 55,898 psi | 90% | 3445 fps | 99.6% |
| Lovex S040 | <<locked>> | 82% | 55,506 psi | 89% | 3340 fps | 100% |
| Lovex S053 | <<locked>> | 96% | 53,838 psi | 86% | 3419 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 47,718 psi | 77% | 3422 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 28,645 psi | 46% | 2165 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 55,941 psi | 90% | 3507 fps | 99.9% |
| Shooters World Blackout | <<locked>> | 84% | 54,302 psi | 87% | 3451 fps | 99.2% |
| Shooters World Buffalo Rifle | <<locked>> | 88% | 54,128 psi | 87% | 3481 fps | 99.1% |
| Shooters World SOCOM | <<locked>> | 88% | 55,898 psi | 90% | 3445 fps | 99.6% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 54,360 psi | 87% | 3255 fps | 100% |
| Vihtavuori N110 | <<locked>> | 92% | 56,318 psi | 90% | 3383 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 51,430 psi | 82% | 3435 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 41,089 psi | 66% | 3212 fps | 95.9% |
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 1680 | <<locked>> | 86% | 38,812 psi | 62% | 3110 fps | 95.3% |
| Accurate 5744 | <<locked>> | 80% | 50,415 psi | 81% | 3409 fps | 98.7% |
| Accurate No. 11 FS | <<locked>> | 80% | 46,325 psi | 74% | 3278 fps | 99.8% |
| ADI APS 450 | <<locked>> | 80% | 52,939 psi | 85% | 2628 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 42,148 psi | 68% | 3107 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 26,745 psi | 43% | 2890 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 98% | 39,262 psi | 63% | 3255 fps | 95.7% |
| Alliant Reloder-7 | <<locked>> | 88% | 37,115 psi | 60% | 3130 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,205 psi | 34% | 1900 fps | 100% |
| IMR 4198 | <<locked>> | 92% | 35,969 psi | 58% | 3104 fps | 95.4% |
| IMR 4227 | <<locked>> | 80% | 34,316 psi | 55% | 3015 fps | 96.6% |
| Lovex D060 | 33.4 gr | 80% | 42,351 psi | 68% | 3235 fps | 97.1% |
| Lovex D063 | <<locked>> | 80% | 42,308 psi | 68% | 3189 fps | 97.9% |
| Lovex S040 | <<locked>> | 80% | 52,214 psi | 84% | 3291 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 33,475 psi | 54% | 2999 fps | 99.1% |
| Norma 200 | <<locked>> | 90% | 34,432 psi | 55% | 3120 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,668 psi | 33% | 1939 fps | 100% |
| ReloadSwiss RS 36 | 34.8 gr | 80% | 33,330 psi | 53% | 3028 fps | 96.1% |
| Shooters World Blackout | <<locked>> | 80% | 47,239 psi | 76% | 3320 fps | 98.3% |
| Shooters World Buffalo Rifle | 33.4 gr | 80% | 42,351 psi | 68% | 3235 fps | 97.1% |
| Shooters World SOCOM | <<locked>> | 80% | 42,308 psi | 68% | 3189 fps | 97.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 31,560 psi | 51% | 2835 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 39,262 psi | 63% | 3091 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 27,093 psi | 43% | 2867 fps | 96.7% |
| Vihtavuori N130 | <<locked>> | 98% | 38,377 psi | 62% | 3146 fps | 95% |
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 40 powders for .300 CR loaded with the .308 | 85gr | Lehigh Defense Xtreme Penetrator. ReloadSwiss RS 36 delivers the highest muzzle velocity at 3,507 fps; across all powders the maximum-charge window runs from 2,119 fps to 3,507 fps. Accurate 2015 gives the best case fill at 100 %, and 40 of the 40 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 46–90 %, leaving at least 10 % headroom. Accurate 2015, Accurate LT-30, Accurate LT-32 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. Shooters World Buffalo Rifle, Lovex D060, ReloadSwiss RS 36 rank at the top here: for .300 CR with the .308 | 85gr | Lehigh Defense Xtreme Penetrator they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2015, Accurate LT-32, ADI AR 2219 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.