Load Specifications
Load data in caliber 6 mm GT with .243 | 90gr | SUS-TAC HPPT bullet and 93 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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 55,608 psi | 90% | 2913 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 55,753 psi | 90% | 3012 fps | 98.7% |
| Accurate 2460 | <<locked>> | 86% | 54,302 psi | 88% | 2940 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 53,011 psi | 86% | 2930 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 55,753 psi | 90% | 2999 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 52,750 psi | 85% | 2966 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 44,686 psi | 72% | 2894 fps | 96.3% |
| Accurate LT-30 | <<locked>> | 84% | 55,666 psi | 90% | 2864 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 56,057 psi | 90% | 2887 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 54,752 psi | 88% | 3002 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 98% | 55,637 psi | 90% | 2992 fps | 98.8% |
| ADI AR 2219 | <<locked>> | 82% | 52,518 psi | 85% | 2933 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 54,099 psi | 87% | 2959 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 90% | 53,824 psi | 87% | 2949 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 55,550 psi | 90% | 3071 fps | 99.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 54,375 psi | 88% | 3110 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 55,042 psi | 89% | 3018 fps | 99.6% |
| Alliant Reloder-10x | <<locked>> | 86% | 55,738 psi | 90% | 2930 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 55,724 psi | 90% | 3038 fps | 98.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,005 psi | 73% | 2904 fps | 96.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 51,779 psi | 84% | 3064 fps | 99.3% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 54,607 psi | 88% | 2854 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 54,665 psi | 88% | 3012 fps | 98.4% |
| Bofors RP3 | <<locked>> | 98% | 55,347 psi | 89% | 3031 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 88% | 52,924 psi | 85% | 2897 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 90% | 52,968 psi | 85% | 2989 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 88% | 54,563 psi | 88% | 3081 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 86% | 54,998 psi | 89% | 2969 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 52,301 psi | 84% | 2936 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 53,635 psi | 87% | 2989 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 92% | 55,187 psi | 89% | 3015 fps | 99.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,249 psi | 67% | 2785 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 53,838 psi | 87% | 3041 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,621 psi | 56% | 1811 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 53,287 psi | 86% | 2963 fps | 99.3% |
| IMR 3031 | <<locked>> | 92% | 54,215 psi | 87% | 3005 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 55,071 psi | 89% | 2976 fps | 98.9% |
| IMR 4198 | <<locked>> | 84% | 52,605 psi | 85% | 2841 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,931 psi | 69% | 2841 fps | 95.9% |
| IMR 4895 | <<locked>> | 94% | 53,577 psi | 86% | 3015 fps | 99.1% |
| IMR 8208 XBR | <<locked>> | 90% | 54,099 psi | 87% | 2959 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 86% | 54,259 psi | 88% | 2946 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 92% | 53,795 psi | 87% | 2979 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 54,969 psi | 89% | 2930 fps | 99.1% |
| Lovex S062 | <<locked>> | 96% | 54,534 psi | 88% | 2976 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 50,546 psi | 82% | 2904 fps | 96.1% |
| Norma 200 | <<locked>> | 82% | 55,753 psi | 90% | 2904 fps | 100% |
| Norma 201 | <<locked>> | 92% | 53,490 psi | 86% | 2949 fps | 99.7% |
| Norma 202 | <<locked>> | 92% | 53,925 psi | 87% | 2959 fps | 100% |
| Norma 203B | <<locked>> | 96% | 54,824 psi | 88% | 3022 fps | 99.2% |
| Norma URPᴾ | <<locked>> | 100% | 44,846 psi | 72% | 2887 fps | 96.2% |
| Ramshot Big Game | <<locked>> | 96% | 55,274 psi | 89% | 3048 fps | 99.1% |
| Ramshot TAC | <<locked>> | 90% | 54,882 psi | 89% | 2966 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 90% | 53,867 psi | 87% | 2992 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 88% | 55,608 psi | 90% | 2963 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,780 psi | 56% | 1850 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 53,911 psi | 87% | 2949 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 54,244 psi | 87% | 2963 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 55,695 psi | 90% | 3107 fps | 99% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 55,332 psi | 89% | 3136 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,730 psi | 72% | 2913 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 90% | 54,476 psi | 88% | 2940 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 53,722 psi | 87% | 2940 fps | 99.7% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 54,636 psi | 88% | 3012 fps | 99.5% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 50,546 psi | 82% | 2904 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 92% | 53,795 psi | 87% | 2979 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 54,534 psi | 88% | 2976 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 53,737 psi | 87% | 2910 fps | 99.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,970 psi | 90% | 2612 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 53,200 psi | 86% | 2946 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 53,156 psi | 86% | 3022 fps | 98.9% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 53,272 psi | 86% | 2900 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 52,605 psi | 85% | 2936 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 53,345 psi | 86% | 2972 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 55,521 psi | 90% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 55,042 psi | 89% | 2887 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 55,651 psi | 90% | 2999 fps | 99.9% |
| Somchem S335 | <<locked>> | 92% | 54,694 psi | 88% | 2897 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 55,970 psi | 90% | 2995 fps | 99.2% |
| Somchem S355ᴾ | <<locked>> | 100% | 55,738 psi | 90% | 3018 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,958 psi | 64% | 2835 fps | 98.3% |
| Vihtavuori N130 | <<locked>> | 88% | 55,521 psi | 90% | 2871 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 55,376 psi | 89% | 2884 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 52,707 psi | 85% | 2917 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 54,534 psi | 88% | 2936 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 53,490 psi | 86% | 2943 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,384 psi | 76% | 2894 fps | 96.7% |
| Vihtavuori N530 | <<locked>> | 90% | 54,505 psi | 88% | 2956 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 94% | 52,402 psi | 85% | 2927 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,572 psi | 75% | 2897 fps | 96.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 48,863 psi | 79% | 2884 fps | 98.8% |
| Winchester 748 | <<locked>> | 90% | 53,867 psi | 87% | 3009 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 92% | 52,924 psi | 85% | 2982 fps | 99.3% |
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% | 41,002 psi | 66% | 2680 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 52,286 psi | 84% | 2953 fps | 98.1% |
| Accurate 2460 | <<locked>> | 80% | 44,411 psi | 72% | 2776 fps | 99.7% |
| Accurate 2495 | <<locked>> | 80% | 33,446 psi | 54% | 2575 fps | 99.8% |
| Accurate 2520 | <<locked>> | 80% | 39,508 psi | 64% | 2720 fps | 99% |
| Accurate 4064 | <<locked>> | 80% | 31,662 psi | 51% | 2556 fps | 98.1% |
| Accurate 4350 | <<locked>> | 98% | 41,640 psi | 67% | 2835 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 49,110 psi | 79% | 2766 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 49,472 psi | 80% | 2785 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 37,608 psi | 61% | 2671 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 86% | 38,522 psi | 62% | 2671 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 49,211 psi | 79% | 2881 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,566 psi | 64% | 2690 fps | 97.5% |
| Alliant AR-Comp | <<locked>> | 80% | 38,435 psi | 62% | 2703 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,658 psi | 74% | 2897 fps | 98.3% |
| Alliant Power Pro 2000-MR | 32.3 gr | 86% | 41,452 psi | 67% | 2854 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 32,938 psi | 53% | 2582 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,354 psi | 75% | 2785 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 38,130 psi | 61% | 2703 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 98% | 42,293 psi | 68% | 2844 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 90% | 37,420 psi | 60% | 2766 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,138 psi | 78% | 2759 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 41,495 psi | 67% | 2772 fps | 95.5% |
| Bofors RP3 | <<locked>> | 84% | 34,505 psi | 56% | 2635 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,785 psi | 67% | 2697 fps | 98.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,492 psi | 60% | 2697 fps | 97.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,104 psi | 66% | 2828 fps | 96.1% |
| Hodgdon H322 | <<locked>> | 80% | 45,223 psi | 73% | 2812 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 45,687 psi | 74% | 2828 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 43,787 psi | 71% | 2812 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 37,826 psi | 61% | 2684 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 36,245 psi | 58% | 2674 fps | 95.5% |
| Hodgdon LEVERevolution | 29.4 gr | 80% | 33,634 psi | 54% | 2631 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,599 psi | 41% | 1617 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,434 psi | 59% | 2635 fps | 95.8% |
| IMR 3031 | <<locked>> | 80% | 36,434 psi | 59% | 2690 fps | 99.8% |
| IMR 4064 | <<locked>> | 84% | 37,913 psi | 61% | 2654 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 47,036 psi | 76% | 2756 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 40,248 psi | 65% | 2782 fps | 95.1% |
| IMR 4895 | <<locked>> | 82% | 36,564 psi | 59% | 2680 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 39,566 psi | 64% | 2690 fps | 97.5% |
| Lovex D073.5 | <<locked>> | 80% | 44,005 psi | 71% | 2776 fps | 99.1% |
| Lovex D073.6 | <<locked>> | 80% | 35,650 psi | 57% | 2644 fps | 98.2% |
| Lovex S060 | <<locked>> | 80% | 38,276 psi | 62% | 2618 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 33,127 psi | 53% | 2552 fps | 95.7% |
| Lovex S065 | <<locked>> | 98% | 47,485 psi | 77% | 2848 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 52,359 psi | 84% | 2854 fps | 100% |
| Norma 201 | <<locked>> | 80% | 36,883 psi | 59% | 2631 fps | 96.9% |
| Norma 202 | <<locked>> | 80% | 36,709 psi | 59% | 2644 fps | 98.9% |
| Norma 203B | <<locked>> | 84% | 37,449 psi | 60% | 2694 fps | 95.6% |
| Norma URP | <<locked>> | 98% | 42,047 psi | 68% | 2831 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 84% | 36,956 psi | 60% | 2697 fps | 95.1% |
| Ramshot TAC | <<locked>> | 86% | 48,225 psi | 78% | 2854 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,435 psi | 62% | 2700 fps | 95.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,946 psi | 69% | 2740 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,846 psi | 42% | 1657 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,237 psi | 71% | 2782 fps | 99.4% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 50,517 psi | 81% | 2900 fps | 95.2% |
| ReloadSwiss RS 52 | 30.6 gr | 84% | 39,581 psi | 64% | 2805 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 30,618 psi | 49% | 2589 fps | 95.4% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 41,945 psi | 68% | 2854 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 40,596 psi | 65% | 2694 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 80% | 35,114 psi | 57% | 2582 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 86% | 34,766 psi | 56% | 2631 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 98% | 47,485 psi | 77% | 2848 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,650 psi | 57% | 2644 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 33,127 psi | 53% | 2552 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 46,847 psi | 76% | 2799 fps | 98.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,040 psi | 86% | 2572 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 49,588 psi | 80% | 2887 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 38,450 psi | 62% | 2740 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,731 psi | 75% | 2799 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 45,934 psi | 74% | 2818 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,100 psi | 58% | 2635 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,305 psi | 62% | 2598 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,386 psi | 51% | 2454 fps | 98.5% |
| Somchem S321 | <<locked>> | 80% | 42,235 psi | 68% | 2766 fps | 98.4% |
| Somchem S335 | <<locked>> | 80% | 38,072 psi | 61% | 2608 fps | 99.5% |
| Somchem S341 | <<locked>> | 80% | 36,970 psi | 60% | 2644 fps | 95.3% |
| Somchem S355 | <<locked>> | 86% | 35,665 psi | 58% | 2638 fps | 95.6% |
| Somchem S365 | <<locked>> | 94% | 33,011 psi | 53% | 2657 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 43,453 psi | 70% | 2687 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,392 psi | 62% | 2605 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,591 psi | 54% | 2575 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 34,853 psi | 56% | 2582 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 82% | 29,965 psi | 48% | 2474 fps | 95% |
| Vihtavuori N160 | <<locked>> | 96% | 41,655 psi | 67% | 2782 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 39,407 psi | 64% | 2684 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 80% | 33,475 psi | 54% | 2562 fps | 98% |
| Vihtavuori N550 | <<locked>> | 98% | 43,671 psi | 70% | 2844 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 35,099 psi | 57% | 2598 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 38,247 psi | 62% | 2720 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,143 psi | 57% | 2631 fps | 95.5% |
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 93 powders for 6 mm GT loaded with the .243 | 90gr | SUS-TAC HPPT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,136 fps; across all powders the maximum-charge window runs from 1,811 fps to 3,136 fps. Accurate 4350 gives the best case fill at 100 %, and 93 of the 93 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (427 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.243" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 6 mm GT with the .243 | 90gr | SUS-TAC HPPT 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.