Load Specifications
Load data in caliber .260 Rem. with .264 | 120gr | Ferrobull Entox Sport bullet and 94 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 60 and Hodgdon Superformance.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 53,142 psi | 88% | 2756 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 51,097 psi | 85% | 2769 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,272 psi | 89% | 2838 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 51,126 psi | 85% | 2766 fps | 96% |
| Accurate 4064 | <<locked>> | 90% | 51,285 psi | 85% | 2818 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 50,879 psi | 85% | 2890 fps | 99.1% |
| ADI AR 2206H | <<locked>> | 86% | 52,518 psi | 87% | 2851 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 53,635 psi | 89% | 2851 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 84% | 51,692 psi | 86% | 2805 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 51,982 psi | 86% | 2782 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 51,953 psi | 86% | 2966 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 53,171 psi | 88% | 2871 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,911 psi | 90% | 2894 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,069 psi | 88% | 2959 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,215 psi | 90% | 2999 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,507 psi | 62% | 2680 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,872 psi | 70% | 2835 fps | 97.2% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 52,388 psi | 87% | 2867 fps | 99.4% |
| Bofors RP3 | <<locked>> | 92% | 53,795 psi | 89% | 2890 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 53,998 psi | 90% | 2854 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 53,432 psi | 89% | 2792 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,056 psi | 90% | 2884 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 52,402 psi | 87% | 2927 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 90% | 51,387 psi | 85% | 2844 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 98% | 54,360 psi | 90% | 2949 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 86% | 53,011 psi | 88% | 2864 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,153 psi | 82% | 2831 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 52,344 psi | 87% | 2897 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 51,547 psi | 86% | 2923 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,143 psi | 58% | 1755 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,447 psi | 90% | 2867 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 52,924 psi | 88% | 2848 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 53,026 psi | 88% | 2835 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 53,229 psi | 88% | 2815 fps | 97.3% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,346 psi | 90% | 2881 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 94% | 52,765 psi | 88% | 2835 fps | 97.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,663 psi | 86% | 2884 fps | 99.3% |
| IMR 4895 | <<locked>> | 88% | 51,866 psi | 86% | 2874 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 84% | 51,692 psi | 86% | 2805 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 51,895 psi | 86% | 2828 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 52,243 psi | 87% | 2782 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 52,692 psi | 88% | 2831 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 51,953 psi | 86% | 2828 fps | 98.3% |
| Lovex S070 | <<locked>> | 98% | 52,852 psi | 88% | 2861 fps | 97.5% |
| Norma 201 | <<locked>> | 88% | 54,331 psi | 90% | 2844 fps | 100% |
| Norma 202 | <<locked>> | 86% | 51,517 psi | 86% | 2799 fps | 100% |
| Norma 203B | <<locked>> | 90% | 53,098 psi | 88% | 2881 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 54,215 psi | 90% | 2943 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 90% | 53,809 psi | 89% | 2910 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,823 psi | 88% | 2930 fps | 98.1% |
| Ramshot TAC | <<locked>> | 84% | 51,909 psi | 86% | 2818 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 51,329 psi | 85% | 2838 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 82% | 52,475 psi | 87% | 2805 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,563 psi | 59% | 1795 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,433 psi | 90% | 2838 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 51,648 psi | 86% | 2825 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,317 psi | 90% | 2963 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,838 psi | 89% | 2995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 50,995 psi | 85% | 2917 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 50,778 psi | 84% | 2936 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 84% | 52,112 psi | 87% | 2782 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 51,750 psi | 86% | 2799 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 53,664 psi | 89% | 2881 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 53,998 psi | 90% | 2854 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 96% | 51,953 psi | 86% | 2828 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 51,895 psi | 86% | 2828 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 52,692 psi | 88% | 2831 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 52,852 psi | 88% | 2861 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 52,069 psi | 87% | 2890 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,432 psi | 89% | 2848 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,346 psi | 90% | 2874 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,011 psi | 88% | 2746 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 52,895 psi | 88% | 2740 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 52,112 psi | 87% | 2779 fps | 97% |
| Somchem S321 | <<locked>> | 82% | 52,533 psi | 87% | 2835 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 52,025 psi | 86% | 2740 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 53,388 psi | 89% | 2844 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 54,012 psi | 90% | 2877 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,327 psi | 80% | 2887 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 52,518 psi | 87% | 2707 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 53,287 psi | 89% | 2733 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 51,198 psi | 85% | 2766 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 52,402 psi | 87% | 2785 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 52,243 psi | 87% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 52,982 psi | 88% | 2881 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 84% | 51,996 psi | 86% | 2805 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 53,867 psi | 89% | 2828 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 52,069 psi | 87% | 2884 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,814 psi | 68% | 2756 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,563 psi | 89% | 2864 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 51,866 psi | 86% | 2851 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 54,360 psi | 90% | 2949 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,257 psi | 55% | 2657 fps | 97.4% |
| Winchester StaBALL Match | <<locked>> | 88% | 54,331 psi | 90% | 2884 fps | 100% |
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 2015 | <<locked>> | 80% | 46,992 psi | 78% | 2664 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,218 psi | 65% | 2579 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,369 psi | 77% | 2733 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 48,008 psi | 80% | 2710 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 37,086 psi | 62% | 2569 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,766 psi | 59% | 2602 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 43,395 psi | 72% | 2694 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 36,796 psi | 61% | 2536 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,527 psi | 76% | 2703 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 45,585 psi | 76% | 2690 fps | 100% |
| Alliant Power Pro 2000-MR | 38.7 gr | 80% | 39,175 psi | 65% | 2710 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,303 psi | 60% | 2559 fps | 98.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,088 psi | 65% | 2625 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 34,113 psi | 57% | 2562 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 80% | 31,082 psi | 52% | 2510 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,995 psi | 51% | 2510 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 36,158 psi | 60% | 2697 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,438 psi | 71% | 2690 fps | 97.8% |
| Bofors RP3 | <<locked>> | 80% | 35,752 psi | 59% | 2559 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 47,543 psi | 79% | 2743 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,195 psi | 78% | 2690 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,976 psi | 73% | 2717 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,704 psi | 81% | 2864 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 80% | 36,463 psi | 61% | 2556 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 92% | 44,382 psi | 74% | 2772 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 43,772 psi | 73% | 2703 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,995 psi | 51% | 2454 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,697 psi | 66% | 2671 fps | 99% |
| Hodgdon Superformance | 47.4 gr | 94% | 47,979 psi | 80% | 2861 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,252 psi | 44% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,843 psi | 70% | 2651 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 43,105 psi | 72% | 2697 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,595 psi | 64% | 2572 fps | 97.4% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,801 psi | 73% | 2648 fps | 95% |
| IMR 4350 | <<locked>> | 96% | 47,906 psi | 80% | 2772 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 46,601 psi | 77% | 2730 fps | 95.7% |
| IMR 4831 | <<locked>> | 88% | 34,621 psi | 58% | 2556 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 40,030 psi | 67% | 2654 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 45,527 psi | 76% | 2703 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 42,250 psi | 70% | 2671 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,584 psi | 72% | 2631 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 38,435 psi | 64% | 2575 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 40,350 psi | 67% | 2615 fps | 95.6% |
| Lovex S070 | <<locked>> | 92% | 43,627 psi | 72% | 2700 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 42,322 psi | 70% | 2644 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 42,699 psi | 71% | 2654 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,435 psi | 64% | 2612 fps | 97.9% |
| Norma URP | <<locked>> | 88% | 36,376 psi | 60% | 2608 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 37,811 psi | 63% | 2618 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 40,640 psi | 68% | 2703 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 45,310 psi | 75% | 2703 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,614 psi | 74% | 2723 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,023 psi | 81% | 2749 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,426 psi | 44% | 1608 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,082 psi | 85% | 2785 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,438 psi | 71% | 2657 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,756 psi | 68% | 2720 fps | 97.9% |
| ReloadSwiss RS 60 | 38.1 gr | 80% | 33,170 psi | 55% | 2582 fps | 98.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,650 psi | 59% | 2618 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 38,696 psi | 64% | 2690 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 45,847 psi | 76% | 2684 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,263 psi | 67% | 2595 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 33,547 psi | 56% | 2500 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 92% | 47,543 psi | 79% | 2743 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 40,350 psi | 67% | 2615 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,250 psi | 70% | 2671 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,435 psi | 64% | 2575 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 43,627 psi | 72% | 2700 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,534 psi | 57% | 2549 fps | 96.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,395 psi | 72% | 2674 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,698 psi | 69% | 2654 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,845 psi | 73% | 2602 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,318 psi | 60% | 2464 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 45,672 psi | 76% | 2671 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 48,994 psi | 81% | 2779 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,395 psi | 72% | 2602 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,192 psi | 72% | 2674 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 34,505 psi | 57% | 2510 fps | 97.2% |
| Somchem S365 | <<locked>> | 82% | 26,527 psi | 44% | 2379 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 49,588 psi | 82% | 2664 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,193 psi | 73% | 2595 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,668 psi | 66% | 2579 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,451 psi | 67% | 2589 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,822 psi | 55% | 2448 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 35,563 psi | 59% | 2552 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 45,600 psi | 76% | 2700 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,682 psi | 64% | 2572 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 37,405 psi | 62% | 2612 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 94% | 33,243 psi | 55% | 2585 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 31,140 psi | 52% | 2421 fps | 96% |
| Winchester 748 | <<locked>> | 80% | 45,179 psi | 75% | 2743 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 44,382 psi | 74% | 2772 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 98% | 31,212 psi | 52% | 2592 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,104 psi | 68% | 2657 fps | 98.9% |
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 94 powders for .260 Rem. loaded with the .264 | 120gr | Ferrobull Entox Sport. Alliant Reloder-17 delivers the highest muzzle velocity at 2,999 fps; across all powders the maximum-charge window runs from 1,755 fps to 2,999 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.264" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Alliant Reloder-26 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 60, Hodgdon Superformance rank at the top here: for .260 Rem. with the .264 | 120gr | Ferrobull Entox Sport 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.