Load Specifications
Load data in caliber 7 mm B.R. Rem. with .284 | 145gr | Speer Grand Slam bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 1200-R, Hodgdon H335 and Somchem S321.
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>> | 84% | 50,053 psi | 85% | 2336 fps | 100% |
| Accurate 2015 | <<locked>> | 98% | 50,053 psi | 85% | 2411 fps | 100% |
| Accurate 2200 | <<locked>> | 90% | 52,736 psi | 90% | 2484 fps | 95.9% |
| Accurate 2230 | <<locked>> | 90% | 53,055 psi | 90% | 2493 fps | 96.4% |
| Accurate 2460 | <<locked>> | 96% | 52,460 psi | 89% | 2474 fps | 99.5% |
| Accurate 2495ᴾ | <<locked>> | 100% | 41,481 psi | 71% | 2362 fps | 99.9% |
| Accurate 2520ᴾ | <<locked>> | 100% | 52,533 psi | 89% | 2513 fps | 99.3% |
| Accurate 4064ᴾ | <<locked>> | 100% | 38,580 psi | 66% | 2336 fps | 98.3% |
| Accurate LT-30 | <<locked>> | 90% | 50,879 psi | 87% | 2349 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 90% | 51,343 psi | 87% | 2359 fps | 99.1% |
| ADI AR 2206Hᴾ | <<locked>> | 100% | 49,153 psi | 84% | 2457 fps | 96.2% |
| ADI AR 2207 | <<locked>> | 88% | 50,415 psi | 86% | 2375 fps | 100% |
| ADI AR 2219 | <<locked>> | 92% | 51,837 psi | 88% | 2484 fps | 99.9% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 52,388 psi | 89% | 2474 fps | 98% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 49,284 psi | 84% | 2477 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 96% | 52,910 psi | 90% | 2566 fps | 97.8% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 49,574 psi | 84% | 2470 fps | 97% |
| Alliant Reloder-10x | <<locked>> | 94% | 51,053 psi | 87% | 2438 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 88% | 52,156 psi | 89% | 2388 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 92% | 51,967 psi | 88% | 2385 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 98% | 52,852 psi | 90% | 2434 fps | 98.5% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 49,617 psi | 84% | 2497 fps | 98.2% |
| Hodgdon CFE223 | <<locked>> | 98% | 52,388 psi | 89% | 2569 fps | 96.1% |
| Hodgdon H322 | <<locked>> | 94% | 50,169 psi | 85% | 2461 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 94% | 51,329 psi | 87% | 2484 fps | 99.6% |
| Hodgdon H4198 | <<locked>> | 88% | 52,852 psi | 90% | 2388 fps | 99.8% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 49,371 psi | 84% | 2467 fps | 96.9% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 44,759 psi | 76% | 2434 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,735 psi | 56% | 1437 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 48,356 psi | 82% | 2428 fps | 96.5% |
| IMR 3031ᴾ | <<locked>> | 100% | 46,934 psi | 80% | 2474 fps | 100% |
| IMR 4198 | <<locked>> | 94% | 52,808 psi | 90% | 2408 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 52,968 psi | 90% | 2343 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 52,388 psi | 89% | 2474 fps | 98% |
| Lovex D073.4 | <<locked>> | 88% | 49,690 psi | 85% | 2441 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 96% | 52,170 psi | 89% | 2470 fps | 98.7% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 46,485 psi | 79% | 2444 fps | 98.7% |
| Lovex S053 | <<locked>> | 84% | 51,532 psi | 88% | 2293 fps | 100% |
| Lovex S060ᴾ | <<locked>> | 100% | 51,401 psi | 88% | 2408 fps | 96.5% |
| Lovex S062ᴾ | <<locked>> | 100% | 42,453 psi | 72% | 2346 fps | 96.2% |
| Norma 200 | <<locked>> | 90% | 51,285 psi | 87% | 2418 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 48,225 psi | 82% | 2418 fps | 97.4% |
| Norma 202ᴾ | <<locked>> | 100% | 47,703 psi | 81% | 2434 fps | 99.3% |
| Ramshot Wild Boarᴾ | <<locked>> | 100% | 51,605 psi | 88% | 2497 fps | 96.6% |
| Ramshot X-Terminator | <<locked>> | 96% | 51,779 psi | 88% | 2441 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,677 psi | 56% | 1473 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 52,939 psi | 90% | 2379 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 53,069 psi | 90% | 2484 fps | 99.2% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 52,199 psi | 89% | 2461 fps | 99.5% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 45,063 psi | 77% | 2362 fps | 96.7% |
| Shooters World AR Plus | <<locked>> | 88% | 49,690 psi | 85% | 2441 fps | 98.9% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 46,485 psi | 79% | 2444 fps | 98.7% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 42,453 psi | 72% | 2346 fps | 96.2% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 50,430 psi | 86% | 2405 fps | 97.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 52,620 psi | 90% | 2165 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 92% | 52,228 psi | 89% | 2487 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 52,344 psi | 89% | 2448 fps | 100% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 47,630 psi | 81% | 2431 fps | 95.8% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 51,880 psi | 88% | 2395 fps | 99.5% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 41,481 psi | 71% | 2267 fps | 99% |
| Somchem S321 | <<locked>> | 96% | 50,067 psi | 85% | 2467 fps | 98% |
| Somchem S335ᴾ | <<locked>> | 100% | 49,995 psi | 85% | 2395 fps | 99.8% |
| Somchem S341ᴾ | <<locked>> | 100% | 50,430 psi | 86% | 2454 fps | 96.1% |
| Vihtavuori N120 | <<locked>> | 88% | 50,502 psi | 86% | 2333 fps | 100% |
| Vihtavuori N130 | <<locked>> | 96% | 51,474 psi | 88% | 2388 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 50,894 psi | 87% | 2395 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 42,772 psi | 73% | 2365 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 45,295 psi | 77% | 2375 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 98% | 50,270 psi | 86% | 2438 fps | 97.7% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 43,671 psi | 74% | 2369 fps | 98.5% |
| Winchester 748ᴾ | <<locked>> | 100% | 51,213 psi | 87% | 2516 fps | 98.7% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 46,934 psi | 80% | 2438 fps | 96.3% |
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>> | 80% | 43,801 psi | 75% | 2251 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 28,834 psi | 49% | 2051 fps | 97.6% |
| Accurate 2200 | <<locked>> | 88% | 49,559 psi | 84% | 2438 fps | 95.2% |
| Accurate 2230 | <<locked>> | 88% | 49,197 psi | 84% | 2441 fps | 95.6% |
| Accurate 2460 | <<locked>> | 80% | 30,763 psi | 52% | 2110 fps | 95% |
| Accurate 2495 | <<locked>> | 82% | 22,800 psi | 39% | 1975 fps | 95.6% |
| Accurate 2520 | <<locked>> | 86% | 32,401 psi | 55% | 2188 fps | 95.2% |
| Accurate 4064 | <<locked>> | 90% | 28,036 psi | 48% | 2119 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 37,391 psi | 64% | 2139 fps | 98.4% |
| Accurate LT-32 | <<locked>> | 80% | 37,782 psi | 64% | 2146 fps | 96.7% |
| ADI AR 2206H | <<locked>> | 98% | 46,267 psi | 79% | 2411 fps | 95.6% |
| ADI AR 2207 | <<locked>> | 80% | 39,813 psi | 68% | 2228 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 34,737 psi | 59% | 2205 fps | 97.7% |
| ADI Benchmark 8208 | <<locked>> | 90% | 38,682 psi | 66% | 2257 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 26,600 psi | 45% | 2067 fps | 99% |
| Alliant Power Pro 1200-R | 26.8 gr | 88% | 40,988 psi | 70% | 2375 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 41,249 psi | 70% | 2336 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 80% | 33,402 psi | 57% | 2156 fps | 99.5% |
| Alliant Reloder-7 | <<locked>> | 80% | 41,162 psi | 70% | 2234 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 35,679 psi | 61% | 2136 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 37,014 psi | 63% | 2185 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 92% | 37,884 psi | 64% | 2306 fps | 95.6% |
| Hodgdon CFE223 | <<locked>> | 96% | 49,226 psi | 84% | 2520 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 80% | 31,937 psi | 54% | 2146 fps | 96.8% |
| Hodgdon H335 | 26 gr | 80% | 32,068 psi | 55% | 2156 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 41,263 psi | 70% | 2218 fps | 98.7% |
| Hodgdon H4895 | <<locked>> | 96% | 43,642 psi | 74% | 2379 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 42,163 psi | 72% | 2392 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,989 psi | 41% | 1280 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 42,830 psi | 73% | 2343 fps | 95.1% |
| IMR 3031 | <<locked>> | 82% | 26,876 psi | 46% | 2077 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 34,969 psi | 60% | 2142 fps | 99.9% |
| IMR 4227 | <<locked>> | 80% | 47,065 psi | 80% | 2267 fps | 100% |
| IMR 8208 XBR | <<locked>> | 90% | 38,682 psi | 66% | 2257 fps | 95% |
| Lovex D073.4 | <<locked>> | 80% | 37,652 psi | 64% | 2247 fps | 96.6% |
| Lovex D073.5 | <<locked>> | 86% | 37,304 psi | 64% | 2244 fps | 95.8% |
| Lovex D073.6 | <<locked>> | 90% | 32,880 psi | 56% | 2211 fps | 95.4% |
| Lovex S053 | <<locked>> | 80% | 45,905 psi | 78% | 2221 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 45,585 psi | 78% | 2323 fps | 95.2% |
| Lovex S062 | <<locked>> | 98% | 39,900 psi | 68% | 2303 fps | 95.6% |
| Norma 200 | <<locked>> | 80% | 37,536 psi | 64% | 2215 fps | 100% |
| Norma 201 | <<locked>> | 94% | 40,030 psi | 68% | 2287 fps | 95.5% |
| Norma 202 | <<locked>> | 86% | 30,748 psi | 52% | 2129 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 96% | 45,252 psi | 77% | 2405 fps | 95.1% |
| Ramshot X-Terminator | <<locked>> | 92% | 45,556 psi | 78% | 2349 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,091 psi | 41% | 1316 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 46,804 psi | 80% | 2300 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 33,721 psi | 57% | 2165 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 82% | 30,879 psi | 53% | 2090 fps | 95% |
| Rottweil R 902 | <<locked>> | 96% | 40,292 psi | 69% | 2283 fps | 95.6% |
| Shooters World AR Plus | <<locked>> | 80% | 37,652 psi | 64% | 2247 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 90% | 32,880 psi | 56% | 2211 fps | 95.4% |
| Shooters World Precision | <<locked>> | 98% | 39,900 psi | 68% | 2303 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 41,379 psi | 70% | 2267 fps | 95.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 42,685 psi | 73% | 2047 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 35,157 psi | 60% | 2211 fps | 96.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 33,721 psi | 57% | 2152 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 98% | 44,802 psi | 76% | 2385 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 31,836 psi | 54% | 2067 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 28,848 psi | 49% | 2024 fps | 95.6% |
| Somchem S321 | 28.8 gr | 88% | 38,406 psi | 65% | 2283 fps | 95.3% |
| Somchem S335 | <<locked>> | 82% | 28,964 psi | 49% | 2031 fps | 95.6% |
| Somchem S341 | <<locked>> | 98% | 46,934 psi | 80% | 2402 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 39,972 psi | 68% | 2192 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 31,923 psi | 54% | 2077 fps | 99% |
| Vihtavuori N133 | <<locked>> | 80% | 27,760 psi | 47% | 1998 fps | 96.9% |
| Vihtavuori N135 | <<locked>> | 80% | 23,061 psi | 39% | 1949 fps | 95.1% |
| Vihtavuori N140 | <<locked>> | 86% | 29,486 psi | 50% | 2080 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 90% | 38,537 psi | 66% | 2254 fps | 95% |
| Vihtavuori N540 | <<locked>> | 90% | 31,937 psi | 54% | 2152 fps | 95.5% |
| Winchester 748 | <<locked>> | 90% | 36,985 psi | 63% | 2280 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 98% | 43,729 psi | 74% | 2385 fps | 95.5% |
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 91 powders for 7 mm B.R. Rem. loaded with the .284 | 145gr | Speer Grand Slam. Hodgdon CFE223 delivers the highest muzzle velocity at 2,569 fps; across all powders the maximum-charge window runs from 1,437 fps to 2,569 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 (405 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 145.0 gr projectile in 0.284" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 2520, Accurate 4064 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. Alliant Power Pro 1200-R, Hodgdon H335, Somchem S321 rank at the top here: for 7 mm B.R. Rem. with the .284 | 145gr | Speer Grand Slam they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2208, Alliant Power Pro 2000-MR, Alliant Reloder- TS 15.5 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.