Load Specifications
Load data in caliber .20 BR with .204 | 32gr | Speer TNT Green bullet and 54 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Hodgdon H322 and Alliant AR-Comp.
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 2015 | <<locked>> | 92% | 49,995 psi | 85% | 3776 fps | 99.8% |
| Accurate 2460 | <<locked>> | 90% | 52,330 psi | 89% | 3822 fps | 98.6% |
| Accurate 2495 | <<locked>> | 98% | 49,734 psi | 85% | 3799 fps | 99.9% |
| Accurate 2520 | <<locked>> | 92% | 49,893 psi | 85% | 3806 fps | 97.9% |
| Accurate 4064ᴾ | <<locked>> | 100% | 49,255 psi | 84% | 3809 fps | 98.7% |
| Accurate LT-30 | <<locked>> | 86% | 50,937 psi | 87% | 3737 fps | 99.2% |
| Accurate LT-32 | <<locked>> | 86% | 51,314 psi | 87% | 3753 fps | 97.9% |
| ADI AR 2207 | <<locked>> | 84% | 51,184 psi | 87% | 3816 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 50,691 psi | 86% | 3852 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 94% | 52,344 psi | 89% | 3835 fps | 96.6% |
| Alliant AR-Comp | <<locked>> | 94% | 50,169 psi | 85% | 3868 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 90% | 52,837 psi | 90% | 3878 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 84% | 52,634 psi | 90% | 3819 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 51,039 psi | 87% | 3704 fps | 99.5% |
| Hodgdon Benchmark | <<locked>> | 92% | 51,648 psi | 88% | 3783 fps | 97.1% |
| Hodgdon BL-C2 | <<locked>> | 94% | 51,561 psi | 88% | 3852 fps | 97.2% |
| Hodgdon H322 | <<locked>> | 90% | 52,924 psi | 90% | 3894 fps | 99.4% |
| Hodgdon H335 | <<locked>> | 88% | 50,763 psi | 86% | 3829 fps | 98.6% |
| Hodgdon H4198 | <<locked>> | 84% | 52,823 psi | 90% | 3812 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 52,315 psi | 89% | 3901 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,300 psi | 55% | 2592 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 51,039 psi | 87% | 3911 fps | 99.7% |
| IMR 4198 | <<locked>> | 88% | 50,662 psi | 86% | 3809 fps | 100% |
| IMR 8208 XBR | <<locked>> | 94% | 52,344 psi | 89% | 3835 fps | 96.6% |
| Lovex D073.4 | <<locked>> | 84% | 51,837 psi | 88% | 3848 fps | 97.9% |
| Lovex D073.5 | <<locked>> | 90% | 52,736 psi | 90% | 3822 fps | 97.7% |
| Lovex D073.6 | <<locked>> | 96% | 51,721 psi | 88% | 3845 fps | 98.2% |
| Lovex S062ᴾ | <<locked>> | 100% | 52,315 psi | 89% | 3835 fps | 96.8% |
| Norma 200 | <<locked>> | 86% | 52,895 psi | 90% | 3848 fps | 100% |
| Norma 201 | <<locked>> | 96% | 51,372 psi | 87% | 3812 fps | 96.5% |
| Norma 202 | <<locked>> | 96% | 51,851 psi | 88% | 3848 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,155 psi | 55% | 2644 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 52,388 psi | 89% | 3848 fps | 97.9% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 47,500 psi | 81% | 3835 fps | 97% |
| Rottweil R 901 | <<locked>> | 94% | 51,880 psi | 88% | 3835 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 98% | 51,677 psi | 88% | 3802 fps | 96.5% |
| Shooters World AR Plus | <<locked>> | 84% | 51,837 psi | 88% | 3848 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 96% | 51,721 psi | 88% | 3845 fps | 98.2% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 52,315 psi | 89% | 3835 fps | 96.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 51,547 psi | 88% | 3547 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 51,387 psi | 87% | 3845 fps | 98.5% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 50,647 psi | 86% | 3832 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 50,995 psi | 87% | 3743 fps | 98.4% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 50,227 psi | 86% | 3711 fps | 99.2% |
| Somchem S321 | <<locked>> | 90% | 50,705 psi | 86% | 3812 fps | 96.7% |
| Somchem S335 | <<locked>> | 96% | 52,968 psi | 90% | 3783 fps | 99.4% |
| Vihtavuori N120 | <<locked>> | 84% | 51,126 psi | 87% | 3750 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 50,270 psi | 86% | 3747 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 50,531 psi | 86% | 3743 fps | 99.8% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 53,156 psi | 90% | 3868 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 52,489 psi | 89% | 3816 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 92% | 49,647 psi | 85% | 3770 fps | 96.1% |
| Vihtavuori N540 | <<locked>> | 98% | 51,503 psi | 88% | 3799 fps | 98.7% |
| Winchester 748 | <<locked>> | 94% | 52,054 psi | 89% | 3881 fps | 97.6% |
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% | 33,083 psi | 56% | 3369 fps | 96.3% |
| Accurate 2460 | <<locked>> | 82% | 38,783 psi | 66% | 3524 fps | 95.2% |
| Accurate 2495 | <<locked>> | 84% | 29,225 psi | 50% | 3284 fps | 95.1% |
| Accurate 2520 | <<locked>> | 86% | 39,653 psi | 68% | 3573 fps | 95.1% |
| Accurate 4064 | <<locked>> | 92% | 36,927 psi | 63% | 3524 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 41,901 psi | 71% | 3543 fps | 97.6% |
| Accurate LT-32 | <<locked>> | 80% | 42,206 psi | 72% | 3550 fps | 95.7% |
| ADI AR 2207 | <<locked>> | 80% | 44,962 psi | 77% | 3694 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 40,799 psi | 69% | 3632 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 92% | 49,226 psi | 84% | 3773 fps | 95.9% |
| Alliant AR-Comp | 25.6 gr | 80% | 30,458 psi | 52% | 3386 fps | 98% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,811 psi | 64% | 3547 fps | 98.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 46,485 psi | 79% | 3698 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 41,191 psi | 70% | 3497 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 45,339 psi | 77% | 3648 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 90% | 44,411 psi | 76% | 3701 fps | 95.4% |
| Hodgdon H322 | 26.4 gr | 80% | 36,956 psi | 63% | 3530 fps | 95.9% |
| Hodgdon H335 | <<locked>> | 80% | 37,811 psi | 64% | 3530 fps | 95.1% |
| Hodgdon H4198 | <<locked>> | 80% | 46,180 psi | 79% | 3678 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 48,646 psi | 83% | 3822 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,699 psi | 40% | 2346 fps | 100% |
| IMR 3031 | 26.8 gr | 84% | 33,344 psi | 57% | 3478 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 39,073 psi | 67% | 3560 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 92% | 49,226 psi | 84% | 3773 fps | 95.9% |
| Lovex D073.4 | <<locked>> | 80% | 44,469 psi | 76% | 3688 fps | 96.1% |
| Lovex D073.5 | <<locked>> | 86% | 45,397 psi | 77% | 3671 fps | 96% |
| Lovex D073.6 | <<locked>> | 90% | 41,017 psi | 70% | 3615 fps | 95.6% |
| Lovex S062 | <<locked>> | 96% | 45,643 psi | 78% | 3694 fps | 95% |
| Norma 200 | <<locked>> | 80% | 42,786 psi | 73% | 3652 fps | 99.8% |
| Norma 201 | <<locked>> | 94% | 48,240 psi | 82% | 3750 fps | 95.7% |
| Norma 202 | <<locked>> | 88% | 39,320 psi | 67% | 3570 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,670 psi | 40% | 2398 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 42,540 psi | 72% | 3632 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 44,193 psi | 75% | 3750 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 86% | 40,059 psi | 68% | 3566 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 96% | 48,573 psi | 83% | 3743 fps | 95.8% |
| Shooters World AR Plus | <<locked>> | 80% | 44,469 psi | 76% | 3688 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 90% | 41,017 psi | 70% | 3615 fps | 95.6% |
| Shooters World Precision | <<locked>> | 96% | 45,643 psi | 78% | 3694 fps | 95% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 45,992 psi | 78% | 3458 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 41,394 psi | 70% | 3622 fps | 96.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,551 psi | 66% | 3560 fps | 97.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 39,015 psi | 66% | 3478 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 35,853 psi | 61% | 3389 fps | 95.8% |
| Somchem S321 | <<locked>> | 88% | 47,210 psi | 80% | 3737 fps | 95.8% |
| Somchem S335 | <<locked>> | 84% | 35,520 psi | 60% | 3389 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 44,976 psi | 77% | 3638 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 36,230 psi | 62% | 3432 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 80% | 31,546 psi | 54% | 3291 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 84% | 30,269 psi | 52% | 3327 fps | 95.4% |
| Vihtavuori N140 | <<locked>> | 88% | 36,956 psi | 63% | 3468 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 90% | 46,050 psi | 78% | 3691 fps | 95% |
| Vihtavuori N540 | <<locked>> | 90% | 38,827 psi | 66% | 3517 fps | 95.6% |
| Winchester 748 | <<locked>> | 90% | 44,831 psi | 76% | 3727 fps | 95.8% |
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 54 powders for .20 BR loaded with the .204 | 32gr | Speer TNT Green. IMR 3031 delivers the highest muzzle velocity at 3,911 fps; across all powders the maximum-charge window runs from 2,592 fps to 3,911 fps. Accurate 4064 gives the best case fill at 100 %, and 54 of the 54 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 32.0 gr projectile in 0.204" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 4064, Hodgdon TrailBoss, Lovex S062 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. IMR 3031, Hodgdon H322, Alliant AR-Comp rank at the top here: for .20 BR with the .204 | 32gr | Speer TNT Green 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.