Load Specifications
Load data in caliber 6.8 mm Rem. SPC with .277 | 95gr | Barnes TAC-TX BT bullet and 23 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Shooters World Buffalo Rifle, Lovex D060 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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 98% | 50,995 psi | 87% | 2720 fps | 98% |
| Accurate 5744 | <<locked>> | 84% | 51,590 psi | 88% | 2759 fps | 98.9% |
| Accurate No. 11 FS | <<locked>> | 86% | 50,198 psi | 85% | 2700 fps | 100% |
| ADI AR 2205 | <<locked>> | 90% | 51,793 psi | 88% | 2638 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 43,845 psi | 75% | 2720 fps | 99.8% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 46,818 psi | 80% | 2713 fps | 98.1% |
| Hodgdon LilGun | <<locked>> | 82% | 51,140 psi | 87% | 2736 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 28,485 psi | 48% | 1624 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 39,842 psi | 68% | 2589 fps | 96.9% |
| IMR 4227 | <<locked>> | 98% | 53,127 psi | 90% | 2753 fps | 99.8% |
| Lovex D060 | <<locked>> | 90% | 51,590 psi | 88% | 2759 fps | 98.9% |
| Lovex D063 | <<locked>> | 86% | 51,329 psi | 87% | 2736 fps | 98.9% |
| Lovex S040 | <<locked>> | 82% | 50,096 psi | 85% | 2598 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 53,084 psi | 90% | 2749 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 40,292 psi | 69% | 2664 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,485 psi | 47% | 1654 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 98% | 51,358 psi | 87% | 2776 fps | 99.7% |
| Shooters World Blackout | <<locked>> | 86% | 51,329 psi | 87% | 2736 fps | 98.9% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 51,590 psi | 88% | 2759 fps | 98.9% |
| Shooters World SOCOM | <<locked>> | 90% | 52,779 psi | 90% | 2736 fps | 99.4% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 48,515 psi | 83% | 2543 fps | 100% |
| Vihtavuori N110 | <<locked>> | 94% | 53,142 psi | 90% | 2674 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 44,179 psi | 75% | 2684 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 1680 | <<locked>> | 90% | 38,899 psi | 66% | 2520 fps | 95.5% |
| Accurate 5744 | <<locked>> | 80% | 45,527 psi | 78% | 2657 fps | 98% |
| Accurate No. 11 FS | <<locked>> | 80% | 40,872 psi | 70% | 2552 fps | 99.5% |
| ADI AR 2205 | <<locked>> | 80% | 38,159 psi | 65% | 2421 fps | 99.9% |
| ADI AR 2207 | <<locked>> | 84% | 26,469 psi | 45% | 2339 fps | 95.8% |
| Alliant Reloder-7 | <<locked>> | 90% | 34,360 psi | 58% | 2480 fps | 95.1% |
| Hodgdon LilGun | <<locked>> | 80% | 47,921 psi | 82% | 2690 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,639 psi | 35% | 1450 fps | 100% |
| IMR 4198 | <<locked>> | 94% | 33,895 psi | 58% | 2461 fps | 95% |
| IMR 4227 | <<locked>> | 80% | 30,792 psi | 52% | 2346 fps | 95.9% |
| Lovex D060 | 18.8 gr | 80% | 38,595 psi | 66% | 2520 fps | 96.5% |
| Lovex D063 | <<locked>> | 80% | 42,337 psi | 72% | 2589 fps | 97.5% |
| Lovex S040 | <<locked>> | 80% | 47,485 psi | 81% | 2562 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 29,675 psi | 51% | 2329 fps | 98.7% |
| Norma 200 | <<locked>> | 94% | 33,011 psi | 56% | 2516 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,957 psi | 34% | 1480 fps | 100% |
| ReloadSwiss RS 36 | 19.5 gr | 80% | 29,138 psi | 50% | 2349 fps | 95.1% |
| Shooters World Blackout | <<locked>> | 80% | 42,337 psi | 72% | 2589 fps | 97.5% |
| Shooters World Buffalo Rifle | 18.8 gr | 80% | 38,595 psi | 66% | 2520 fps | 96.5% |
| Shooters World SOCOM | <<locked>> | 80% | 37,811 psi | 64% | 2487 fps | 97% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 28,326 psi | 48% | 2205 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 35,186 psi | 60% | 2405 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 23,931 psi | 41% | 2231 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 32 powders for 6.8 mm Rem. SPC loaded with the .277 | 95gr | Barnes TAC-TX BT. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,776 fps; across all powders the maximum-charge window runs from 1,624 fps to 2,776 fps. Accurate LT-30 gives the best case fill at 100 %, and 32 of the 32 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 47–90 %, leaving at least 10 % headroom. The 95.0 gr projectile in 0.277" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate LT-30, Accurate LT-32, ADI AR 2207 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. Shooters World Buffalo Rifle, Lovex D060, ReloadSwiss RS 36 rank at the top here: for 6.8 mm Rem. SPC with the .277 | 95gr | Barnes TAC-TX BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate LT-30, Accurate LT-32, ADI AR 2219 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.