Load Specifications
Load data in caliber 7 x 50 R with .284 | 130gr | Sierra HPBT MatchKing bullet and 29 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma 200, ADI AR 2207 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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 90% | 47,152 psi | 89% | 2313 fps | 99.4% |
| Accurate 2015ᴾ | <<locked>> | 100% | 38,435 psi | 73% | 2267 fps | 97.3% |
| Accurate LT-30 | <<locked>> | 96% | 47,471 psi | 90% | 2303 fps | 97.5% |
| ADI AR 2205 | <<locked>> | 82% | 47,732 psi | 90% | 2215 fps | 100% |
| ADI AR 2207 | <<locked>> | 94% | 45,658 psi | 86% | 2362 fps | 100% |
| ADI AR 2219 | <<locked>> | 98% | 46,818 psi | 88% | 2415 fps | 97.2% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 36,056 psi | 68% | 2283 fps | 98.8% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 45,005 psi | 85% | 2385 fps | 99.4% |
| Alliant Reloder-7 | <<locked>> | 94% | 47,587 psi | 90% | 2359 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 96% | 44,875 psi | 85% | 2293 fps | 97.3% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 45,150 psi | 85% | 2392 fps | 96.9% |
| Hodgdon H335ᴾ | <<locked>> | 100% | 45,687 psi | 86% | 2402 fps | 95.8% |
| Hodgdon H4198 | <<locked>> | 92% | 46,427 psi | 88% | 2300 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 30,429 psi | 57% | 1407 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 47,906 psi | 90% | 2372 fps | 99.9% |
| IMR 4227 | <<locked>> | 88% | 47,079 psi | 89% | 2297 fps | 100% |
| Lovex D060 | <<locked>> | 82% | 47,587 psi | 90% | 2326 fps | 99.8% |
| Lovex S053 | <<locked>> | 90% | 47,892 psi | 90% | 2293 fps | 100% |
| Norma 200 | <<locked>> | 96% | 45,295 psi | 86% | 2375 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,240 psi | 57% | 1444 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 88% | 46,195 psi | 87% | 2326 fps | 100% |
| Shooters World Buffalo Rifle | <<locked>> | 82% | 47,587 psi | 90% | 2326 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 92% | 46,644 psi | 88% | 2142 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 98% | 46,746 psi | 88% | 2418 fps | 96.1% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 46,282 psi | 87% | 2382 fps | 98.1% |
| Vihtavuori N110 | <<locked>> | 84% | 47,630 psi | 90% | 2215 fps | 100% |
| Vihtavuori N120 | <<locked>> | 94% | 45,832 psi | 87% | 2323 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 43,439 psi | 82% | 2300 fps | 98.9% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 37,681 psi | 71% | 2211 fps | 96.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 33,794 psi | 64% | 2093 fps | 97% |
| Accurate 2015 | <<locked>> | 94% | 32,126 psi | 61% | 2146 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 88% | 37,579 psi | 71% | 2146 fps | 95.2% |
| ADI AR 2205 | <<locked>> | 80% | 44,846 psi | 85% | 2178 fps | 100% |
| ADI AR 2207 | 18.9 gr | 80% | 29,718 psi | 56% | 2087 fps | 99.2% |
| ADI AR 2219 | <<locked>> | 92% | 38,841 psi | 73% | 2283 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 90% | 26,905 psi | 51% | 2070 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 84% | 27,673 psi | 52% | 2057 fps | 95.1% |
| Alliant Reloder-7 | <<locked>> | 80% | 31,227 psi | 59% | 2073 fps | 96.9% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 37,246 psi | 70% | 2169 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 96% | 39,827 psi | 75% | 2303 fps | 95.5% |
| Hodgdon H335 | <<locked>> | 98% | 42,975 psi | 81% | 2359 fps | 95.1% |
| Hodgdon H4198 | <<locked>> | 88% | 41,626 psi | 79% | 2224 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,307 psi | 42% | 1257 fps | 100% |
| IMR 4198 | <<locked>> | 80% | 27,470 psi | 52% | 1985 fps | 95.6% |
| IMR 4227 | <<locked>> | 80% | 37,304 psi | 70% | 2146 fps | 99.6% |
| Lovex D060 | <<locked>> | 80% | 45,266 psi | 86% | 2290 fps | 99.6% |
| Lovex S053 | <<locked>> | 80% | 36,303 psi | 69% | 2119 fps | 100% |
| Norma 200 | 19.7 gr | 80% | 27,398 psi | 52% | 2041 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 21,901 psi | 41% | 1283 fps | 100% |
| ReloadSwiss RS 36 | 19.6 gr | 80% | 35,984 psi | 68% | 2162 fps | 99.3% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 45,266 psi | 86% | 2290 fps | 99.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 34,345 psi | 65% | 1972 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 96% | 44,034 psi | 83% | 2379 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 34,708 psi | 66% | 2182 fps | 95.1% |
| Vihtavuori N110 | <<locked>> | 80% | 42,844 psi | 81% | 2152 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 29,979 psi | 57% | 2064 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 86% | 28,747 psi | 54% | 2028 fps | 95% |
| Vihtavuori N133 | <<locked>> | 96% | 33,779 psi | 64% | 2136 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 29 powders for 7 x 50 R loaded with the .284 | 130gr | Sierra HPBT MatchKing. SNPE Vectan SP 10 delivers the highest muzzle velocity at 2,418 fps; across all powders the maximum-charge window runs from 1,407 fps to 2,418 fps. Accurate 2015 gives the best case fill at 100 %, and 29 of the 29 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (365 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 2015, Alliant AR-Comp, Alliant Reloder-10x 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. Norma 200, ADI AR 2207, ReloadSwiss RS 36 rank at the top here: for 7 x 50 R with the .284 | 130gr | Sierra HPBT MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.