Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 139gr | Prvi Partizan FMJ bullet and 87 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and ReloadSwiss RS 60.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 53,490 psi | 88% | 3136 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 51,692 psi | 85% | 3123 fps | 96.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,283 psi | 79% | 3146 fps | 97.8% |
| Accurate 4064 | <<locked>> | 86% | 53,635 psi | 88% | 3189 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,099 psi | 89% | 3284 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 82% | 53,069 psi | 87% | 3215 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 88% | 54,447 psi | 89% | 3222 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 52,083 psi | 86% | 3251 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 53,142 psi | 87% | 3343 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,868 psi | 90% | 3245 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,114 psi | 90% | 3271 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,911 psi | 90% | 3346 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 52,489 psi | 86% | 3320 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,650 psi | 90% | 3304 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,469 psi | 75% | 3176 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,914 psi | 66% | 3061 fps | 96.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,982 psi | 85% | 3376 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 53,026 psi | 87% | 3228 fps | 99.6% |
| Bofors RP3 | <<locked>> | 86% | 52,112 psi | 86% | 3205 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 51,924 psi | 85% | 3173 fps | 97% |
| Hodgdon H380 | <<locked>> | 86% | 52,634 psi | 86% | 3215 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 92% | 52,939 psi | 87% | 3274 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 90% | 53,127 psi | 87% | 3235 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 82% | 53,679 psi | 88% | 3228 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,998 psi | 90% | 3261 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 53,664 psi | 88% | 3264 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 53,272 psi | 87% | 3307 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,926 psi | 59% | 2054 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,824 psi | 90% | 3232 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,954 psi | 89% | 3212 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,751 psi | 88% | 3202 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 53,330 psi | 88% | 3176 fps | 97.8% |
| IMR 4350 | <<locked>> | 94% | 52,605 psi | 86% | 3202 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 53,722 psi | 88% | 3209 fps | 97.8% |
| IMR 4831 | <<locked>> | 96% | 54,636 psi | 90% | 3274 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 52,997 psi | 87% | 3245 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 53,214 psi | 87% | 3189 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 52,228 psi | 86% | 3136 fps | 99.9% |
| Lovex S062 | <<locked>> | 86% | 53,954 psi | 89% | 3202 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 53,417 psi | 88% | 3202 fps | 98.9% |
| Lovex S070 | <<locked>> | 94% | 54,621 psi | 90% | 3241 fps | 98.2% |
| Norma 201 | <<locked>> | 82% | 51,938 psi | 85% | 3159 fps | 100% |
| Norma 202 | <<locked>> | 82% | 52,620 psi | 86% | 3163 fps | 100% |
| Norma 203B | <<locked>> | 86% | 54,375 psi | 89% | 3251 fps | 100% |
| Norma 204 | <<locked>> | 94% | 53,026 psi | 87% | 3248 fps | 96% |
| Norma MRPᴾ | <<locked>> | 100% | 51,184 psi | 84% | 3323 fps | 97.6% |
| Norma URP | <<locked>> | 94% | 53,011 psi | 87% | 3268 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 84% | 51,547 psi | 85% | 3219 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 94% | 51,750 psi | 85% | 3258 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,463 psi | 60% | 2100 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 52,837 psi | 87% | 3196 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 52,257 psi | 86% | 3281 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 52,025 psi | 85% | 3317 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 53,983 psi | 89% | 3304 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 52,895 psi | 87% | 3333 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 84% | 52,533 psi | 86% | 3159 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 52,199 psi | 86% | 3199 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 53,664 psi | 88% | 3287 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 90% | 51,924 psi | 85% | 3173 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 92% | 53,417 psi | 88% | 3202 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 53,214 psi | 87% | 3189 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,954 psi | 89% | 3202 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,621 psi | 90% | 3241 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 53,679 psi | 88% | 3261 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,331 psi | 89% | 3212 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,100 psi | 90% | 3241 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 53,011 psi | 87% | 3094 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,679 psi | 88% | 3091 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 53,461 psi | 88% | 3150 fps | 97.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,171 psi | 87% | 3278 fps | 96.5% |
| Somchem S335 | <<locked>> | 82% | 52,649 psi | 86% | 3091 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,969 psi | 89% | 3202 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 52,301 psi | 86% | 3196 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 51,677 psi | 85% | 3271 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,563 psi | 90% | 3261 fps | 97.6% |
| Vihtavuori N133 | <<locked>> | 82% | 53,461 psi | 88% | 3077 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 52,649 psi | 86% | 3123 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 53,098 psi | 87% | 3136 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 53,534 psi | 88% | 3169 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 51,750 psi | 85% | 3205 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 86% | 54,853 psi | 90% | 3182 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 54,375 psi | 89% | 3268 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,546 psi | 83% | 3261 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 51,663 psi | 85% | 3173 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 53,156 psi | 87% | 3278 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,915 psi | 67% | 3205 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 82% | 51,648 psi | 85% | 3189 fps | 100% |
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 2495 | <<locked>> | 80% | 46,746 psi | 77% | 3025 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,281 psi | 74% | 2999 fps | 95.1% |
| Accurate 3100 | <<locked>> | 94% | 39,160 psi | 64% | 2953 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 44,208 psi | 73% | 3022 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,069 psi | 54% | 2828 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 49,777 psi | 82% | 3156 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 42,395 psi | 70% | 2989 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 96% | 48,718 psi | 80% | 3186 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,108 psi | 76% | 3205 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,453 psi | 70% | 3012 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,397 psi | 75% | 3084 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,938 psi | 54% | 2841 fps | 95% |
| Alliant Reloder-17 | 67 gr | 80% | 37,101 psi | 61% | 2989 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 96% | 47,964 psi | 79% | 3173 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,879 psi | 51% | 2802 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 37,420 psi | 61% | 2992 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 90% | 35,998 psi | 59% | 3009 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,545 psi | 81% | 3163 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 42,467 psi | 70% | 3018 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 45,876 psi | 75% | 3051 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 43,062 psi | 71% | 3022 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 43,250 psi | 71% | 3077 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 86% | 46,746 psi | 77% | 3107 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 50,343 psi | 83% | 3169 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,298 psi | 50% | 2726 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,862 psi | 77% | 3140 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 45,919 psi | 75% | 3159 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,745 psi | 44% | 1837 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,182 psi | 79% | 3114 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 50,618 psi | 83% | 3159 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,570 psi | 73% | 3028 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,963 psi | 77% | 3051 fps | 96.4% |
| IMR 4350 | <<locked>> | 90% | 46,325 psi | 76% | 3081 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 44,469 psi | 73% | 3025 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 34,287 psi | 56% | 2844 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 46,557 psi | 76% | 3120 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 49,806 psi | 82% | 3133 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,211 psi | 81% | 3081 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 44,628 psi | 73% | 3028 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 39,160 psi | 64% | 2904 fps | 95.7% |
| Lovex S070 | <<locked>> | 86% | 42,453 psi | 70% | 3002 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 48,689 psi | 80% | 3100 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,327 psi | 81% | 3104 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,773 psi | 74% | 3071 fps | 99.3% |
| Norma 204 | <<locked>> | 92% | 49,632 psi | 81% | 3186 fps | 95.2% |
| Norma MRP | <<locked>> | 96% | 44,367 psi | 73% | 3179 fps | 95.7% |
| Norma URP | <<locked>> | 82% | 35,549 psi | 58% | 2890 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 44,860 psi | 74% | 3091 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 39,668 psi | 65% | 3002 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,137 psi | 45% | 1880 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,308 psi | 71% | 3005 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,617 psi | 80% | 3212 fps | 99.4% |
| ReloadSwiss RS 60 | 67 gr | 80% | 39,450 psi | 65% | 3064 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 35,360 psi | 58% | 2910 fps | 95.5% |
| ReloadSwiss RS 70 | 71.4 gr | 84% | 37,333 psi | 61% | 2979 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 46,325 psi | 76% | 3045 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 39,900 psi | 66% | 2956 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 50,125 psi | 82% | 3219 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 86% | 45,876 psi | 75% | 3051 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 39,160 psi | 64% | 2904 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,806 psi | 82% | 3133 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,628 psi | 73% | 3028 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 42,453 psi | 70% | 3002 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,988 psi | 67% | 3012 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,720 psi | 83% | 3150 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,370 psi | 79% | 3120 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,821 psi | 82% | 3041 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,843 psi | 69% | 2890 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,888 psi | 72% | 2963 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 49,647 psi | 82% | 3215 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 49,429 psi | 81% | 3038 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,415 psi | 83% | 3140 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 40,437 psi | 66% | 2959 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 29,878 psi | 49% | 2776 fps | 97.2% |
| Somchem S385 | <<locked>> | 94% | 44,556 psi | 73% | 3071 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 50,270 psi | 83% | 3028 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,383 psi | 76% | 3022 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,673 psi | 77% | 3028 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,566 psi | 63% | 2884 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 34,563 psi | 57% | 2831 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 45,121 psi | 74% | 3015 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,171 psi | 56% | 2831 fps | 95% |
| Vihtavuori N555 | <<locked>> | 86% | 31,618 psi | 52% | 2825 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,243 psi | 56% | 2802 fps | 97.7% |
| Winchester 760 | <<locked>> | 86% | 43,439 psi | 71% | 3084 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 90% | 29,312 psi | 48% | 2831 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,196 psi | 79% | 3127 fps | 99.8% |
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 105 powders for .300 Blaser Mag. loaded with the .308 | 139gr | Prvi Partizan FMJ. Alliant Reloder-26 delivers the highest muzzle velocity at 3,376 fps; across all powders the maximum-charge window runs from 2,054 fps to 3,376 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. ReloadSwiss RS 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .300 Blaser Mag. with the .308 | 139gr | Prvi Partizan FMJ they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.