Load Specifications
Load data in caliber .300 Blaser Mag. with .306 | 155gr | Fox Classic Hunter bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-16 and ReloadSwiss RS 70.
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.
A valid access license is required to use the Personalized Load Calculator.
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% | 53,447 psi | 88% | 2976 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 52,272 psi | 86% | 2989 fps | 97.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,646 psi | 80% | 3012 fps | 98.6% |
| Accurate 4064 | <<locked>> | 86% | 53,882 psi | 88% | 3035 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,592 psi | 90% | 3140 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 53,534 psi | 88% | 3225 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 82% | 53,708 psi | 88% | 3068 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 54,998 psi | 90% | 3074 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 52,765 psi | 87% | 3120 fps | 97% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,012 psi | 89% | 3202 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 52,620 psi | 86% | 3117 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 51,822 psi | 85% | 3038 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 52,214 psi | 86% | 3064 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 52,127 psi | 86% | 3143 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 53,258 psi | 87% | 3173 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 51,866 psi | 85% | 3107 fps | 97% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 48,704 psi | 80% | 3097 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,774 psi | 75% | 3038 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,118 psi | 66% | 2940 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,634 psi | 86% | 3241 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 53,592 psi | 88% | 3084 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 52,359 psi | 86% | 3054 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 48,704 psi | 80% | 3097 fps | 96.5% |
| Bofors RP7 | <<locked>> | 90% | 52,330 psi | 86% | 3031 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 86% | 53,026 psi | 87% | 3071 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 53,592 psi | 88% | 3136 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 90% | 53,766 psi | 88% | 3097 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 82% | 54,273 psi | 89% | 3081 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 52,170 psi | 86% | 3064 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 54,244 psi | 89% | 3114 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 53,911 psi | 89% | 3173 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,955 psi | 59% | 1932 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 52,054 psi | 85% | 3028 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 54,752 psi | 90% | 3058 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,346 psi | 89% | 3054 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 53,766 psi | 88% | 3031 fps | 98.5% |
| IMR 4350 | <<locked>> | 94% | 53,171 psi | 87% | 3064 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,128 psi | 89% | 3068 fps | 98.6% |
| IMR 4831 | <<locked>> | 94% | 51,576 psi | 85% | 3071 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 53,592 psi | 88% | 3094 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 53,737 psi | 88% | 3038 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 52,895 psi | 87% | 2992 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,201 psi | 89% | 3048 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 53,940 psi | 89% | 3061 fps | 99.4% |
| Lovex S070 | <<locked>> | 94% | 54,955 psi | 90% | 3100 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,016 psi | 66% | 2841 fps | 96.7% |
| Norma 201 | <<locked>> | 82% | 52,243 psi | 86% | 3005 fps | 100% |
| Norma 202 | <<locked>> | 82% | 52,881 psi | 87% | 3005 fps | 100% |
| Norma 203B | <<locked>> | 86% | 54,897 psi | 90% | 3104 fps | 100% |
| Norma 204 | <<locked>> | 94% | 53,722 psi | 88% | 3114 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 51,750 psi | 85% | 3189 fps | 98.4% |
| Norma URP | <<locked>> | 94% | 53,548 psi | 88% | 3123 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 52,214 psi | 86% | 3074 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 52,388 psi | 86% | 3120 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,506 psi | 60% | 1978 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 53,171 psi | 87% | 3051 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 52,852 psi | 87% | 3133 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 52,808 psi | 87% | 3169 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,549 psi | 90% | 3163 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 53,577 psi | 88% | 3192 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 52,895 psi | 87% | 3009 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 52,431 psi | 86% | 3048 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 54,418 psi | 89% | 3091 fps | 96.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,346 psi | 89% | 3150 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 52,330 psi | 86% | 3031 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 53,940 psi | 89% | 3061 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 53,737 psi | 88% | 3038 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,201 psi | 89% | 3048 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,955 psi | 90% | 3100 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,273 psi | 89% | 3114 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,737 psi | 90% | 3068 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 52,141 psi | 86% | 3035 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 53,461 psi | 88% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,230 psi | 89% | 2943 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 53,679 psi | 88% | 3005 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,853 psi | 88% | 3143 fps | 97.5% |
| Somchem S335 | <<locked>> | 82% | 52,982 psi | 87% | 2936 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,505 psi | 89% | 3054 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 52,736 psi | 87% | 3048 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 52,315 psi | 86% | 3127 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,998 psi | 90% | 3123 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 82% | 53,983 psi | 89% | 2927 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 53,011 psi | 87% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 53,635 psi | 88% | 2986 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,041 psi | 89% | 3022 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 52,402 psi | 86% | 3064 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 47,427 psi | 78% | 2976 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 84% | 51,880 psi | 85% | 2982 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,071 psi | 90% | 3127 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,184 psi | 84% | 3120 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 52,156 psi | 86% | 3031 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 53,824 psi | 88% | 3140 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,249 psi | 68% | 3081 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 52,214 psi | 86% | 3045 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 51,648 psi | 85% | 3054 fps | 96.8% |
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% | 46,673 psi | 77% | 2874 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,614 psi | 75% | 2867 fps | 96.2% |
| Accurate 3100 | <<locked>> | 92% | 36,637 psi | 60% | 2766 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 44,251 psi | 73% | 2874 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,083 psi | 54% | 2697 fps | 96.1% |
| Accurate High Country | <<locked>> | 98% | 49,748 psi | 82% | 3153 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 50,183 psi | 82% | 3009 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,772 psi | 70% | 2851 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 46,021 psi | 76% | 2992 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,615 psi | 77% | 3068 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 46,006 psi | 76% | 2992 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,844 psi | 70% | 2877 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,730 psi | 75% | 2943 fps | 99.5% |
| Alliant Reloder-16 | 59.4 gr | 80% | 33,141 psi | 54% | 2723 fps | 96.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,260 psi | 61% | 2858 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 94% | 45,411 psi | 75% | 2982 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 45,600 psi | 75% | 3035 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,122 psi | 45% | 2559 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 96% | 35,128 psi | 58% | 2805 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 88% | 33,620 psi | 55% | 2815 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,096 psi | 82% | 3025 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 42,670 psi | 70% | 2881 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 45,600 psi | 75% | 3035 fps | 95.6% |
| Bofors RP7 | <<locked>> | 84% | 43,149 psi | 71% | 2854 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 43,395 psi | 71% | 2890 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 84% | 40,872 psi | 67% | 2887 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 84% | 44,208 psi | 73% | 2913 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 50,749 psi | 83% | 3022 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,530 psi | 50% | 2612 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,427 psi | 78% | 2999 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 40,001 psi | 66% | 2890 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,658 psi | 44% | 1726 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,617 psi | 80% | 2966 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 51,198 psi | 84% | 3005 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,962 psi | 74% | 2887 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,195 psi | 77% | 2913 fps | 97.4% |
| IMR 4350 | <<locked>> | 86% | 41,220 psi | 68% | 2835 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,479 psi | 65% | 2776 fps | 95.2% |
| IMR 4831 | <<locked>> | 80% | 32,097 psi | 53% | 2654 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 46,905 psi | 77% | 2976 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 50,111 psi | 82% | 2982 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,661 psi | 82% | 2936 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,875 psi | 74% | 2887 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,782 psi | 60% | 2717 fps | 95.9% |
| Lovex S070 | <<locked>> | 84% | 39,914 psi | 66% | 2808 fps | 95.7% |
| Lovex S071 | <<locked>> | 96% | 35,114 psi | 58% | 2730 fps | 95% |
| Norma 201 | <<locked>> | 80% | 48,994 psi | 80% | 2953 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,777 psi | 82% | 2956 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,063 psi | 74% | 2930 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 46,833 psi | 77% | 2989 fps | 95.5% |
| Norma MRP | <<locked>> | 94% | 41,756 psi | 69% | 2986 fps | 96% |
| Norma URP | <<locked>> | 80% | 33,446 psi | 55% | 2703 fps | 96.1% |
| Ramshot Big Game | <<locked>> | 80% | 45,295 psi | 74% | 2953 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 37,347 psi | 61% | 2812 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,050 psi | 44% | 1768 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,598 psi | 72% | 2871 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,168 psi | 81% | 3068 fps | 99.8% |
| ReloadSwiss RS 60 | 63.9 gr | 80% | 39,682 psi | 65% | 2923 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,069 psi | 54% | 2720 fps | 95.7% |
| ReloadSwiss RS 70 | 66.5 gr | 82% | 34,954 psi | 57% | 2789 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 46,717 psi | 77% | 2904 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,147 psi | 66% | 2822 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 96% | 50,981 psi | 84% | 3031 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 94% | 44,338 psi | 73% | 2966 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 84% | 43,149 psi | 71% | 2854 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,782 psi | 60% | 2717 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,111 psi | 82% | 2982 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,875 psi | 74% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 39,914 psi | 66% | 2808 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,336 psi | 68% | 2877 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,111 psi | 84% | 3009 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,762 psi | 80% | 2976 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,096 psi | 82% | 2890 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,047 psi | 69% | 2746 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,551 psi | 63% | 2713 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 43,918 psi | 72% | 2956 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 49,763 psi | 82% | 2887 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,966 psi | 84% | 2999 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,654 psi | 67% | 2822 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 29,878 psi | 49% | 2651 fps | 98.2% |
| Somchem S385 | <<locked>> | 92% | 41,930 psi | 69% | 2881 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 50,618 psi | 83% | 2874 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,615 psi | 77% | 2871 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,181 psi | 77% | 2884 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,841 psi | 64% | 2753 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 34,766 psi | 57% | 2707 fps | 96.5% |
| Vihtavuori N165 | <<locked>> | 98% | 44,353 psi | 73% | 2917 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 45,513 psi | 75% | 2874 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,360 psi | 56% | 2710 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 84% | 29,472 psi | 48% | 2638 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,374 psi | 56% | 2680 fps | 98.6% |
| Winchester 760 | <<locked>> | 84% | 40,872 psi | 67% | 2887 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 27,253 psi | 45% | 2644 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,762 psi | 80% | 2986 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 44,773 psi | 74% | 2927 fps | 95% |
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 95 powders for .300 Blaser Mag. loaded with the .306 | 155gr | Fox Classic Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 3,241 fps; across all powders the maximum-charge window runs from 1,932 fps to 3,241 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 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 155.0 gr projectile in 0.306" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Alliant Reloder-22 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 60, Alliant Reloder-16, ReloadSwiss RS 70 rank at the top here: for .300 Blaser Mag. with the .306 | 155gr | Fox Classic Hunter 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.