Load Specifications
Bullet:.284 | 140gr | Barnes XLC BT
Bullet Manufacturer:Barnes
Bullet Weight:140 gr
Bullet Diameter:0.284"
Bullet Length:<<locked>>
Caliber:.284 Win. load data
Case Length (l3):2.17"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:66 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:10.5
Load data in caliber .284 Win. with .284 | 140gr | Barnes XLC BT bullet and 96 powders. The key underlying parameters are shown in the table above.
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.
A valid access license is required to use the Personalized Load Calculator.
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% | 57,188 psi | 90% | 2756 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 57,014 psi | 89% | 2789 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 57,334 psi | 90% | 2841 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,447 psi | 85% | 2766 fps | 96.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,178 psi | 68% | 2680 fps | 95.9% |
| Accurate 4064 | <<locked>> | 90% | 56,637 psi | 89% | 2835 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,274 psi | 87% | 2907 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 55,637 psi | 87% | 2851 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 56,318 psi | 88% | 2848 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,592 psi | 86% | 2802 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,506 psi | 87% | 2779 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,940 psi | 86% | 2966 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,608 psi | 89% | 2874 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,377 psi | 90% | 2897 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,651 psi | 87% | 2953 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 57,101 psi | 89% | 2992 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,017 psi | 64% | 2707 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,498 psi | 71% | 2861 fps | 98% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,303 psi | 87% | 2864 fps | 99.5% |
| Bofors RP3 | <<locked>> | 90% | 54,447 psi | 85% | 2848 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 57,377 psi | 90% | 2854 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,362 psi | 88% | 2785 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 57,696 psi | 90% | 2884 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,738 psi | 87% | 2930 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 90% | 55,056 psi | 86% | 2851 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 98% | 57,421 psi | 90% | 2946 fps | 98% |
| Hodgdon H4350 | <<locked>> | 94% | 54,607 psi | 86% | 2854 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 86% | 56,144 psi | 88% | 2861 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,315 psi | 82% | 2835 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,593 psi | 87% | 2897 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,389 psi | 85% | 2923 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,853 psi | 56% | 1732 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 57,116 psi | 90% | 2861 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 56,405 psi | 88% | 2848 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,927 psi | 88% | 2831 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,970 psi | 88% | 2808 fps | 97.6% |
| IMR 4350ᴾ | <<locked>> | 100% | 57,232 psi | 90% | 2877 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,492 psi | 87% | 2831 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,419 psi | 87% | 2894 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 55,477 psi | 87% | 2877 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 54,592 psi | 86% | 2802 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 56,057 psi | 88% | 2835 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,216 psi | 87% | 2779 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 56,246 psi | 88% | 2831 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,564 psi | 87% | 2835 fps | 98.6% |
| Lovex S070 | <<locked>> | 98% | 56,260 psi | 88% | 2867 fps | 97.9% |
| Norma 201 | <<locked>> | 86% | 55,027 psi | 86% | 2802 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,042 psi | 86% | 2802 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,666 psi | 89% | 2884 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 57,334 psi | 90% | 2940 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 90% | 56,956 psi | 89% | 2907 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,956 psi | 88% | 2933 fps | 98.5% |
| Ramshot TAC | <<locked>> | 84% | 54,868 psi | 86% | 2818 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,607 psi | 86% | 2841 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,390 psi | 87% | 2799 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,608 psi | 57% | 1778 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 57,392 psi | 90% | 2828 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,969 psi | 86% | 2828 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 57,638 psi | 90% | 2959 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 57,116 psi | 90% | 2995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,404 psi | 85% | 2923 fps | 99.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 57,682 psi | 90% | 3002 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 84% | 56,565 psi | 89% | 2789 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,724 psi | 87% | 2802 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,653 psi | 90% | 2884 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 57,377 psi | 90% | 2854 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,564 psi | 87% | 2835 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 56,057 psi | 88% | 2835 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,246 psi | 88% | 2831 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,260 psi | 88% | 2867 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,100 psi | 86% | 2887 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 57,029 psi | 89% | 2851 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 57,363 psi | 90% | 2871 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,173 psi | 88% | 2740 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,115 psi | 88% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,593 psi | 87% | 2782 fps | 97.5% |
| Somchem S321 | <<locked>> | 82% | 55,999 psi | 88% | 2835 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,666 psi | 87% | 2740 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,449 psi | 88% | 2841 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 57,740 psi | 90% | 2881 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,938 psi | 81% | 2897 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 55,651 psi | 87% | 2697 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,231 psi | 88% | 2723 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,882 psi | 86% | 2762 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,608 psi | 87% | 2779 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,550 psi | 87% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,144 psi | 88% | 2881 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 84% | 55,143 psi | 86% | 2802 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 57,203 psi | 90% | 2825 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,492 psi | 87% | 2890 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,860 psi | 70% | 2785 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 56,405 psi | 88% | 2858 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,839 psi | 86% | 2848 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 57,725 psi | 90% | 2949 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,883 psi | 58% | 2710 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 88% | 57,392 psi | 90% | 2881 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 50,749 psi | 80% | 2664 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,744 psi | 70% | 2612 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,604 psi | 79% | 2746 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 48,240 psi | 76% | 2664 fps | 95.1% |
| Accurate 3100 | <<locked>> | 98% | 40,306 psi | 63% | 2625 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 42,264 psi | 66% | 2608 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 35,273 psi | 55% | 2533 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 46,717 psi | 73% | 2700 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 80% | 39,784 psi | 62% | 2552 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,515 psi | 76% | 2703 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 49,182 psi | 77% | 2694 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,235 psi | 66% | 2726 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,740 psi | 62% | 2579 fps | 98.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,554 psi | 67% | 2641 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 84% | 34,998 psi | 55% | 2533 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,534 psi | 54% | 2552 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 90% | 30,850 psi | 48% | 2451 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 94% | 37,420 psi | 59% | 2677 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,643 psi | 72% | 2700 fps | 98.3% |
| Bofors RP3 | <<locked>> | 80% | 39,813 psi | 62% | 2592 fps | 98.9% |
| Bofors RP7 | <<locked>> | 90% | 48,066 psi | 75% | 2700 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,183 psi | 79% | 2690 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,587 psi | 75% | 2730 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,170 psi | 82% | 2871 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 80% | 40,466 psi | 63% | 2589 fps | 96.4% |
| Hodgdon H414 | <<locked>> | 90% | 44,860 psi | 70% | 2733 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 92% | 51,459 psi | 81% | 2802 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 47,108 psi | 74% | 2710 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 30,603 psi | 48% | 2388 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,917 psi | 67% | 2684 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 92% | 47,747 psi | 75% | 2805 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,919 psi | 42% | 1549 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,020 psi | 71% | 2661 fps | 99.3% |
| IMR 3031 | <<locked>> | 80% | 46,760 psi | 73% | 2707 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,800 psi | 66% | 2585 fps | 98.1% |
| IMR 4166 Enduron | <<locked>> | 82% | 46,746 psi | 73% | 2651 fps | 95.6% |
| IMR 4350 | <<locked>> | 94% | 48,080 psi | 75% | 2726 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,630 psi | 73% | 2680 fps | 95.5% |
| IMR 4831 | <<locked>> | 84% | 34,026 psi | 53% | 2487 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 43,511 psi | 68% | 2671 fps | 98.8% |
| IMR 8208 XBR | <<locked>> | 80% | 48,515 psi | 76% | 2703 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 46,238 psi | 72% | 2684 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,383 psi | 73% | 2635 fps | 99.2% |
| Lovex S062 | <<locked>> | 80% | 42,163 psi | 66% | 2595 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 39,349 psi | 62% | 2539 fps | 95.1% |
| Lovex S070 | <<locked>> | 90% | 44,614 psi | 70% | 2667 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 46,180 psi | 72% | 2657 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 46,064 psi | 72% | 2661 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,959 psi | 66% | 2631 fps | 98.5% |
| Norma URP | <<locked>> | 84% | 35,331 psi | 55% | 2530 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 41,089 psi | 64% | 2638 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 41,336 psi | 65% | 2667 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 48,472 psi | 76% | 2710 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,066 psi | 75% | 2733 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,054 psi | 82% | 2749 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,441 psi | 43% | 1588 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 54,114 psi | 85% | 2782 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 43,120 psi | 68% | 2618 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,382 psi | 70% | 2740 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,550 psi | 57% | 2615 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 36,970 psi | 58% | 2595 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 39,334 psi | 62% | 2654 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 50,662 psi | 79% | 2700 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,063 psi | 69% | 2612 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 37,565 psi | 59% | 2536 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 48,066 psi | 75% | 2700 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 39,349 psi | 62% | 2539 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,238 psi | 72% | 2684 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,163 psi | 66% | 2595 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 44,614 psi | 70% | 2667 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,913 psi | 59% | 2575 fps | 97.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,282 psi | 74% | 2694 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,962 psi | 70% | 2667 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,094 psi | 74% | 2605 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,479 psi | 62% | 2477 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 46,398 psi | 73% | 2631 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 52,605 psi | 82% | 2785 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,833 psi | 73% | 2608 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,572 psi | 73% | 2684 fps | 99.1% |
| Somchem S355 | <<locked>> | 80% | 38,305 psi | 60% | 2539 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 28,442 psi | 45% | 2382 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 52,765 psi | 83% | 2657 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,253 psi | 74% | 2595 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,468 psi | 68% | 2592 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,598 psi | 68% | 2595 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,260 psi | 57% | 2474 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 84% | 36,622 psi | 57% | 2526 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 48,602 psi | 76% | 2700 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 42,308 psi | 66% | 2589 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 36,332 psi | 57% | 2533 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 90% | 33,199 psi | 52% | 2530 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,256 psi | 51% | 2398 fps | 96.3% |
| Winchester 748 | <<locked>> | 80% | 48,399 psi | 76% | 2749 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 44,860 psi | 70% | 2733 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 94% | 31,067 psi | 49% | 2530 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,556 psi | 70% | 2674 fps | 99.3% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 113 powders for .284 Win. loaded with the .284 | 140gr | Barnes XLC BT. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,002 fps; across all powders the maximum-charge window runs from 1,732 fps to 3,002 fps. Accurate 3100 gives the best case fill at 100 %, and 113 of the 113 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, ADI AR 2209 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. As outliers, Accurate High Country, ADI AR 2209, Alliant Reloder-19 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.