Load Specifications
Load data in caliber 8.5 x 55 Blaser with .338 | 210gr | Barnes TTSX BT bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and Hodgdon LEVERevolution.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 92% | 55,666 psi | 89% | 2575 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 56,434 psi | 90% | 2671 fps | 99% |
| Accurate 2230 | <<locked>> | 82% | 53,432 psi | 86% | 2628 fps | 98.9% |
| Accurate 2460 | <<locked>> | 88% | 54,186 psi | 87% | 2602 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 55,201 psi | 89% | 2625 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 55,521 psi | 89% | 2657 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 54,679 psi | 88% | 2661 fps | 100% |
| Accurate LT-30 | <<locked>> | 86% | 56,391 psi | 90% | 2533 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 53,461 psi | 86% | 2510 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 54,694 psi | 88% | 2657 fps | 99.3% |
| ADI AR 2207 | <<locked>> | 82% | 54,244 psi | 87% | 2507 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 55,550 psi | 89% | 2651 fps | 99% |
| ADI AR 2219 | <<locked>> | 84% | 52,837 psi | 85% | 2598 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 54,085 psi | 87% | 2618 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 92% | 53,229 psi | 85% | 2602 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 55,666 psi | 89% | 2720 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 54,259 psi | 87% | 2759 fps | 98.8% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 54,462 psi | 87% | 2671 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 88% | 55,608 psi | 89% | 2585 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 55,274 psi | 89% | 2687 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 41,959 psi | 67% | 2520 fps | 95.9% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,225 psi | 77% | 2667 fps | 99% |
| Alliant Reloder-7 | <<locked>> | 82% | 55,100 psi | 88% | 2523 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 55,259 psi | 89% | 2530 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 54,259 psi | 87% | 2671 fps | 98.6% |
| Bofors RP3ᴾ | <<locked>> | 100% | 54,505 psi | 87% | 2680 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 90% | 53,243 psi | 85% | 2562 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 94% | 56,362 psi | 90% | 2697 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 54,418 psi | 87% | 2733 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 88% | 54,998 psi | 88% | 2625 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 56,217 psi | 90% | 2651 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 53,026 psi | 85% | 2644 fps | 97.8% |
| Hodgdon H4198 | <<locked>> | 82% | 54,984 psi | 88% | 2533 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 55,187 psi | 88% | 2671 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 37,985 psi | 61% | 2415 fps | 96.6% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 53,287 psi | 85% | 2694 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,171 psi | 55% | 1558 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 53,359 psi | 86% | 2625 fps | 99.4% |
| IMR 3031 | <<locked>> | 94% | 54,027 psi | 87% | 2657 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 55,042 psi | 88% | 2635 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 96% | 56,231 psi | 90% | 2615 fps | 96% |
| IMR 4198 | <<locked>> | 86% | 53,403 psi | 86% | 2510 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 53,243 psi | 85% | 2671 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 92% | 54,085 psi | 87% | 2618 fps | 99.8% |
| Lovex D073.4 | <<locked>> | 82% | 54,085 psi | 87% | 2608 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 54,012 psi | 87% | 2608 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 53,200 psi | 85% | 2638 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 55,259 psi | 89% | 2595 fps | 99.3% |
| Lovex S062 | <<locked>> | 98% | 53,998 psi | 87% | 2631 fps | 99.8% |
| Norma 200 | <<locked>> | 84% | 55,332 psi | 89% | 2556 fps | 100% |
| Norma 201 | <<locked>> | 94% | 53,113 psi | 85% | 2608 fps | 99.8% |
| Norma 202 | <<locked>> | 94% | 53,563 psi | 86% | 2618 fps | 100% |
| Norma 203B | <<locked>> | 98% | 54,288 psi | 87% | 2677 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 98% | 55,100 psi | 88% | 2703 fps | 99.3% |
| Ramshot TAC | <<locked>> | 92% | 54,839 psi | 88% | 2631 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 92% | 53,664 psi | 86% | 2651 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 90% | 55,637 psi | 89% | 2621 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,185 psi | 55% | 1591 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 53,954 psi | 87% | 2608 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 53,925 psi | 86% | 2625 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 55,259 psi | 89% | 2753 fps | 99.1% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 51,619 psi | 83% | 2733 fps | 100% |
| Rottweil R 901 | <<locked>> | 92% | 54,012 psi | 87% | 2595 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 53,577 psi | 86% | 2605 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 50,633 psi | 81% | 2621 fps | 99.3% |
| Shooters World AR Plus | <<locked>> | 82% | 54,085 psi | 87% | 2608 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 94% | 53,200 psi | 85% | 2638 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 53,998 psi | 87% | 2631 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 54,172 psi | 87% | 2582 fps | 99.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 54,041 psi | 87% | 2267 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 53,374 psi | 86% | 2608 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 52,779 psi | 85% | 2677 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 53,650 psi | 86% | 2562 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 52,373 psi | 84% | 2602 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 53,011 psi | 85% | 2631 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 56,057 psi | 90% | 2566 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 55,216 psi | 89% | 2556 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 55,448 psi | 89% | 2657 fps | 99.9% |
| Somchem S335 | <<locked>> | 94% | 54,505 psi | 87% | 2559 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 55,622 psi | 89% | 2651 fps | 99.3% |
| Somchem S355ᴾ | <<locked>> | 100% | 51,387 psi | 82% | 2618 fps | 99.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,840 psi | 59% | 2457 fps | 97.8% |
| Vihtavuori N120 | <<locked>> | 82% | 54,186 psi | 87% | 2457 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 55,724 psi | 89% | 2536 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 55,811 psi | 89% | 2552 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 55,637 psi | 89% | 2618 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 54,070 psi | 87% | 2595 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 49,922 psi | 80% | 2562 fps | 99.7% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 43,990 psi | 71% | 2516 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 92% | 54,795 psi | 88% | 2621 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 98% | 55,840 psi | 90% | 2641 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 42,714 psi | 68% | 2513 fps | 95.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,382 psi | 73% | 2507 fps | 98.4% |
| Winchester 748 | <<locked>> | 92% | 53,664 psi | 86% | 2664 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 96% | 56,246 psi | 90% | 2690 fps | 99.7% |
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 2015 | <<locked>> | 80% | 38,000 psi | 61% | 2320 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 49,414 psi | 79% | 2566 fps | 98% |
| Accurate 2230 | <<locked>> | 80% | 49,792 psi | 80% | 2572 fps | 98.4% |
| Accurate 2460 | <<locked>> | 80% | 41,176 psi | 66% | 2408 fps | 99.6% |
| Accurate 2495 | <<locked>> | 80% | 30,037 psi | 48% | 2221 fps | 99.7% |
| Accurate 2520 | <<locked>> | 80% | 36,506 psi | 59% | 2359 fps | 98.8% |
| Accurate 4064 | <<locked>> | 80% | 28,485 psi | 46% | 2198 fps | 97.6% |
| Accurate LT-30 | <<locked>> | 80% | 46,862 psi | 75% | 2402 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,239 psi | 76% | 2421 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 34,940 psi | 56% | 2313 fps | 95.3% |
| ADI AR 2207 | <<locked>> | 80% | 50,894 psi | 82% | 2464 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 38,392 psi | 62% | 2369 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 46,238 psi | 74% | 2503 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,985 psi | 59% | 2333 fps | 97.3% |
| Alliant AR-Comp | <<locked>> | 80% | 35,418 psi | 57% | 2343 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,554 psi | 68% | 2510 fps | 98.1% |
| Alliant Power Pro 2000-MR | 53.3 gr | 88% | 41,191 psi | 66% | 2526 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 32,445 psi | 52% | 2287 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,366 psi | 70% | 2415 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 37,637 psi | 60% | 2392 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 98% | 39,508 psi | 63% | 2470 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 90% | 34,476 psi | 55% | 2392 fps | 95.1% |
| Alliant Reloder-7 | <<locked>> | 80% | 51,822 psi | 83% | 2480 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,687 psi | 73% | 2402 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 38,754 psi | 62% | 2408 fps | 95.2% |
| Bofors RP3 | <<locked>> | 84% | 31,546 psi | 51% | 2280 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,189 psi | 63% | 2336 fps | 98.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,722 psi | 56% | 2339 fps | 97.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 38,290 psi | 61% | 2454 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 80% | 42,308 psi | 68% | 2441 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 42,670 psi | 68% | 2454 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 92% | 43,337 psi | 69% | 2490 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 51,677 psi | 83% | 2487 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 35,143 psi | 56% | 2323 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 35,665 psi | 57% | 2365 fps | 95.8% |
| Hodgdon LEVERevolution | 48.7 gr | 82% | 33,417 psi | 54% | 2333 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,121 psi | 40% | 1388 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,113 psi | 55% | 2287 fps | 95.6% |
| IMR 3031 | <<locked>> | 80% | 33,866 psi | 54% | 2336 fps | 99.8% |
| IMR 4064 | <<locked>> | 86% | 37,826 psi | 61% | 2352 fps | 95.7% |
| IMR 4166 Enduron | <<locked>> | 94% | 52,953 psi | 85% | 2569 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 44,585 psi | 71% | 2388 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 33,707 psi | 54% | 2320 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 36,985 psi | 59% | 2333 fps | 97.3% |
| Lovex D073.4 | <<locked>> | 80% | 50,415 psi | 81% | 2559 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 40,857 psi | 66% | 2408 fps | 98.9% |
| Lovex D073.6 | <<locked>> | 80% | 32,822 psi | 53% | 2293 fps | 97.9% |
| Lovex S060 | <<locked>> | 80% | 36,172 psi | 58% | 2274 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 30,705 psi | 49% | 2211 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 48,863 psi | 78% | 2474 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,113 psi | 55% | 2274 fps | 96.6% |
| Norma 202 | <<locked>> | 80% | 34,243 psi | 55% | 2293 fps | 98.8% |
| Norma 203B | <<locked>> | 84% | 34,679 psi | 56% | 2333 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 86% | 36,680 psi | 59% | 2392 fps | 95.5% |
| Ramshot TAC | <<locked>> | 86% | 45,150 psi | 72% | 2480 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 35,723 psi | 57% | 2339 fps | 95.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,263 psi | 65% | 2375 fps | 96.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,251 psi | 40% | 1421 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,640 psi | 67% | 2418 fps | 99.3% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 50,444 psi | 81% | 2575 fps | 95.6% |
| ReloadSwiss RS 52 | 49.3 gr | 84% | 36,390 psi | 58% | 2428 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 30,211 psi | 48% | 2293 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 37,536 psi | 60% | 2326 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 80% | 32,474 psi | 52% | 2231 fps | 96% |
| Rottweil R 903 | <<locked>> | 86% | 31,676 psi | 51% | 2274 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 50,415 psi | 81% | 2559 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,822 psi | 53% | 2293 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 30,705 psi | 49% | 2211 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,135 psi | 71% | 2431 fps | 98.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,068 psi | 82% | 2234 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 46,485 psi | 75% | 2510 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 35,752 psi | 57% | 2379 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,208 psi | 71% | 2431 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 42,627 psi | 68% | 2448 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 35,969 psi | 58% | 2336 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,027 psi | 58% | 2254 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,283 psi | 47% | 2129 fps | 98.3% |
| Somchem S321 | <<locked>> | 80% | 39,450 psi | 63% | 2405 fps | 98.2% |
| Somchem S335 | <<locked>> | 80% | 35,404 psi | 57% | 2257 fps | 99.4% |
| Somchem S341 | <<locked>> | 82% | 36,869 psi | 59% | 2346 fps | 95.8% |
| Somchem S355 | <<locked>> | 86% | 33,069 psi | 53% | 2290 fps | 95.3% |
| Somchem S365 | <<locked>> | 94% | 30,429 psi | 49% | 2303 fps | 95.2% |
| Vihtavuori N120 | <<locked>> | 80% | 50,894 psi | 82% | 2418 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 41,046 psi | 66% | 2333 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,100 psi | 58% | 2260 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 31,096 psi | 50% | 2231 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 32,242 psi | 52% | 2234 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 84% | 29,414 psi | 47% | 2185 fps | 95.4% |
| Vihtavuori N160 | <<locked>> | 98% | 41,075 psi | 66% | 2461 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 36,767 psi | 59% | 2326 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 80% | 30,951 psi | 50% | 2221 fps | 97.8% |
| Vihtavuori N550 | <<locked>> | 98% | 40,118 psi | 64% | 2467 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 34,780 psi | 56% | 2303 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 35,433 psi | 57% | 2359 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,605 psi | 52% | 2283 fps | 95.1% |
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 95 powders for 8.5 x 55 Blaser loaded with the .338 | 210gr | Barnes TTSX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,759 fps; across all powders the maximum-charge window runs from 1,558 fps to 2,759 fps. Accurate 4064 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 210.0 gr projectile in 0.338" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 4064, ADI AR 2208, Alliant Reloder- TS 15.5 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 2000-MR, ReloadSwiss RS 52, Hodgdon LEVERevolution rank at the top here: for 8.5 x 55 Blaser with the .338 | 210gr | Barnes TTSX BT 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.