Load Specifications
Load data in caliber 6.5 x 63 Messner Mag. with .263 | 123gr | Prvi Partizan SP bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Winchester StaBALL HD.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 57,537 psi | 90% | 3120 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 54,418 psi | 85% | 3091 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,376 psi | 88% | 3228 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 88% | 55,492 psi | 87% | 3159 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 57,145 psi | 90% | 3228 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,274 psi | 87% | 3189 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,835 psi | 78% | 3146 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 55,593 psi | 87% | 3153 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 84% | 55,506 psi | 87% | 3153 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,955 psi | 86% | 3143 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,406 psi | 90% | 3222 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 55,390 psi | 87% | 3133 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,882 psi | 86% | 3196 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,811 psi | 87% | 3222 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 52,547 psi | 82% | 3205 fps | 96.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 54,621 psi | 86% | 3117 fps | 96.7% |
| Bofors RP15 | <<locked>> | 94% | 56,565 psi | 89% | 3205 fps | 99.8% |
| Bofors RP30 | <<locked>> | 98% | 54,882 psi | 86% | 3202 fps | 99.4% |
| Bofors RP5 | <<locked>> | 92% | 57,406 psi | 90% | 3222 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 56,043 psi | 88% | 3091 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 57,130 psi | 90% | 3219 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 55,956 psi | 88% | 3150 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 56,797 psi | 89% | 3159 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,753 psi | 87% | 3143 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 55,724 psi | 87% | 3071 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 53,867 psi | 84% | 3278 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,637 psi | 89% | 3189 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,420 psi | 59% | 2005 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 54,665 psi | 86% | 3081 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,377 psi | 90% | 3114 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 54,897 psi | 86% | 3087 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,450 psi | 90% | 3140 fps | 99% |
| IMR 7828 SSC | <<locked>> | 92% | 55,317 psi | 87% | 3209 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,252 psi | 71% | 3041 fps | 97.7% |
| Lovex S065 | <<locked>> | 82% | 55,027 psi | 86% | 3061 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,637 psi | 89% | 3110 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 55,187 psi | 86% | 3087 fps | 100% |
| Norma 204 | <<locked>> | 84% | 55,666 psi | 87% | 3140 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 45,774 psi | 72% | 3074 fps | 99.5% |
| Norma MRP | <<locked>> | 90% | 57,580 psi | 90% | 3245 fps | 100% |
| Norma URP | <<locked>> | 84% | 56,391 psi | 88% | 3130 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,202 psi | 88% | 3225 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 55,448 psi | 87% | 3136 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 54,665 psi | 86% | 3153 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,159 psi | 60% | 2047 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 54,650 psi | 86% | 3117 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 57,043 psi | 89% | 3205 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,534 psi | 85% | 3268 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 53,940 psi | 85% | 3222 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 88% | 56,289 psi | 88% | 3127 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 88% | 54,563 psi | 86% | 3133 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 82% | 56,043 psi | 88% | 3091 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,027 psi | 86% | 3061 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,637 psi | 89% | 3110 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,435 psi | 90% | 3064 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 54,157 psi | 85% | 3130 fps | 99.6% |
| Somchem S361 | <<locked>> | 86% | 54,099 psi | 85% | 3051 fps | 98.4% |
| Somchem S365 | <<locked>> | 86% | 57,493 psi | 90% | 3133 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 55,085 psi | 86% | 3104 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 82% | 54,375 psi | 85% | 3064 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 54,810 psi | 86% | 3084 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 84% | 57,290 psi | 90% | 3127 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,435 psi | 90% | 3159 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,174 psi | 90% | 3241 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 96% | 57,537 psi | 90% | 3225 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 98% | 54,549 psi | 85% | 3222 fps | 98% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 55,680 psi | 87% | 3284 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,638 psi | 90% | 3068 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,231 psi | 88% | 3153 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 54,056 psi | 85% | 3219 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 55,056 psi | 86% | 3100 fps | 99.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 38,363 psi | 60% | 2766 fps | 98.7% |
| Accurate 4350 | <<locked>> | 80% | 50,923 psi | 80% | 3035 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 42,380 psi | 66% | 2949 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 42,322 psi | 66% | 2904 fps | 97.6% |
| ADI AR 2213 | <<locked>> | 82% | 40,538 psi | 64% | 2897 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 90% | 39,291 psi | 62% | 2861 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 86% | 31,270 psi | 49% | 2690 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,728 psi | 67% | 2904 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,704 psi | 76% | 3038 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,337 psi | 66% | 2897 fps | 97.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,203 psi | 60% | 2838 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,898 psi | 58% | 2792 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,981 psi | 50% | 2703 fps | 97.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,307 psi | 65% | 2956 fps | 99.9% |
| Alliant Reloder-33 | <<locked>> | 98% | 48,675 psi | 76% | 3127 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 48,312 psi | 76% | 2995 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 35,650 psi | 56% | 2769 fps | 95.3% |
| Bofors RP30 | <<locked>> | 88% | 38,870 psi | 61% | 2877 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 38,203 psi | 60% | 2838 fps | 96.5% |
| Bofors RP7 | <<locked>> | 80% | 52,663 psi | 83% | 3035 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 37,594 psi | 59% | 2822 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 52,315 psi | 82% | 3087 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 40,350 psi | 63% | 2835 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 82% | 42,438 psi | 67% | 2884 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,861 psi | 72% | 2910 fps | 100% |
| Hodgdon Retumbo | 59.9 gr | 82% | 33,431 psi | 52% | 2789 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 52,649 psi | 83% | 3120 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,050 psi | 44% | 1795 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,124 psi | 75% | 2963 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,998 psi | 85% | 3058 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 48,153 psi | 75% | 2972 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,843 psi | 66% | 2838 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 82% | 39,088 psi | 61% | 2871 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 94% | 36,985 psi | 58% | 2851 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 51,547 psi | 81% | 3002 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,096 psi | 79% | 2999 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 32,967 psi | 52% | 2635 fps | 97.2% |
| Norma 204 | <<locked>> | 80% | 48,559 psi | 76% | 3009 fps | 98.7% |
| Norma 217 | <<locked>> | 90% | 32,445 psi | 51% | 2749 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 40,306 psi | 63% | 2913 fps | 98.4% |
| Norma URP | <<locked>> | 80% | 49,647 psi | 78% | 3018 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 38,870 psi | 61% | 2877 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 48,501 psi | 76% | 3015 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 32,329 psi | 51% | 2677 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,761 psi | 45% | 1837 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,053 psi | 80% | 3058 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,284 psi | 77% | 3077 fps | 100% |
| ReloadSwiss RS 76 | 64.1 gr | 82% | 32,590 psi | 51% | 2759 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 42,815 psi | 67% | 2999 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 43,497 psi | 68% | 2881 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 80% | 41,887 psi | 66% | 2887 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 80% | 52,663 psi | 83% | 3035 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,547 psi | 81% | 3002 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,096 psi | 79% | 2999 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,459 psi | 79% | 2949 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,553 psi | 65% | 2881 fps | 97.5% |
| Somchem S361 | <<locked>> | 80% | 44,353 psi | 70% | 2867 fps | 96.3% |
| Somchem S365 | <<locked>> | 80% | 47,021 psi | 74% | 2969 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,264 psi | 66% | 2864 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 80% | 50,995 psi | 80% | 3009 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,796 psi | 58% | 2726 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 80% | 50,444 psi | 79% | 3015 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,394 psi | 65% | 2877 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 40,248 psi | 63% | 2900 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 86% | 41,002 psi | 64% | 2900 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 92% | 44,092 psi | 69% | 3015 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 98% | 51,822 psi | 81% | 3212 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,241 psi | 79% | 2959 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,576 psi | 82% | 3094 fps | 99.9% |
| Winchester StaBALL HD | 60 gr | 80% | 33,808 psi | 53% | 2828 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,754 psi | 61% | 2782 fps | 96.6% |
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 71 powders for 6.5 x 63 Messner Mag. loaded with the .263 | 123gr | Prvi Partizan SP. Vihtavuori N570 delivers the highest muzzle velocity at 3,284 fps; across all powders the maximum-charge window runs from 2,005 fps to 3,284 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 123.0 gr projectile in 0.263" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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. Hodgdon Retumbo, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for 6.5 x 63 Messner Mag. with the .263 | 123gr | Prvi Partizan SP 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.