Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 146gr | Peregrine Glider (Glider GRM) bullet and 94 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, Hodgdon Superformance 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.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 54,462 psi | 87% | 2953 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 56,362 psi | 90% | 3018 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,027 psi | 88% | 3045 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,318 psi | 90% | 3022 fps | 96.5% |
| Accurate 4064 | <<locked>> | 90% | 52,852 psi | 85% | 3018 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 53,040 psi | 85% | 3097 fps | 99.1% |
| ADI AR 2206H | <<locked>> | 86% | 53,751 psi | 86% | 3051 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 92% | 54,998 psi | 88% | 3054 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,289 psi | 90% | 3061 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,403 psi | 86% | 2982 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,432 psi | 86% | 3169 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,810 psi | 88% | 3074 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,521 psi | 89% | 3100 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,665 psi | 88% | 3163 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,869 psi | 90% | 3202 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,812 psi | 62% | 2861 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,395 psi | 70% | 3025 fps | 97% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,650 psi | 86% | 3064 fps | 99.2% |
| Bofors RP3 | <<locked>> | 92% | 55,288 psi | 89% | 3087 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,680 psi | 89% | 3058 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,462 psi | 87% | 2989 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,825 psi | 90% | 3087 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,896 psi | 86% | 3130 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 90% | 52,823 psi | 85% | 3045 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 98% | 56,144 psi | 90% | 3150 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 86% | 54,288 psi | 87% | 3064 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,691 psi | 81% | 3028 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,867 psi | 86% | 3097 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,272 psi | 85% | 3123 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,302 psi | 57% | 1903 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,753 psi | 89% | 3071 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 54,244 psi | 87% | 3051 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,244 psi | 87% | 3035 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,433 psi | 87% | 3012 fps | 97% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,057 psi | 90% | 3084 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,099 psi | 87% | 3031 fps | 96.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,722 psi | 86% | 3087 fps | 99.2% |
| IMR 4895 | <<locked>> | 88% | 53,330 psi | 86% | 3074 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 86% | 56,289 psi | 90% | 3061 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,316 psi | 85% | 3028 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,476 psi | 86% | 2982 fps | 99.7% |
| Lovex S062 | <<locked>> | 90% | 54,099 psi | 87% | 3035 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,476 psi | 86% | 3028 fps | 98.1% |
| Lovex S070 | <<locked>> | 98% | 54,157 psi | 87% | 3058 fps | 97.2% |
| Norma 201 | <<locked>> | 88% | 55,622 psi | 89% | 3048 fps | 100% |
| Norma 202 | <<locked>> | 86% | 52,910 psi | 85% | 2999 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,708 psi | 88% | 3087 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 55,869 psi | 90% | 3143 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 90% | 55,390 psi | 89% | 3110 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,824 psi | 88% | 3136 fps | 98% |
| Ramshot TAC | <<locked>> | 84% | 52,953 psi | 85% | 3012 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 52,678 psi | 84% | 3035 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,534 psi | 86% | 3002 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,621 psi | 57% | 1942 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,550 psi | 89% | 3035 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,388 psi | 86% | 3028 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,115 psi | 90% | 3173 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,709 psi | 89% | 3205 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 52,895 psi | 85% | 3117 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 52,736 psi | 85% | 3146 fps | 98.6% |
| Rottweil R 901 | <<locked>> | 86% | 56,405 psi | 90% | 3028 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,188 psi | 90% | 3048 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,143 psi | 88% | 3081 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,680 psi | 89% | 3058 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,476 psi | 86% | 3028 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,316 psi | 85% | 3028 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,099 psi | 87% | 3035 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,157 psi | 87% | 3058 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,606 psi | 86% | 3087 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,027 psi | 88% | 3051 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,912 psi | 90% | 3077 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,099 psi | 87% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,389 psi | 87% | 2936 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,592 psi | 86% | 2972 fps | 96.8% |
| Somchem S321 | <<locked>> | 82% | 53,766 psi | 86% | 3031 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,316 psi | 85% | 2936 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,723 psi | 88% | 3041 fps | 99.7% |
| Somchem S355 | <<locked>> | 94% | 55,492 psi | 89% | 3077 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,241 psi | 81% | 3087 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 53,577 psi | 86% | 2904 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,404 psi | 87% | 2930 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,159 psi | 90% | 3015 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,577 psi | 86% | 2979 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 53,548 psi | 86% | 3005 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,940 psi | 88% | 3087 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 84% | 53,098 psi | 85% | 2999 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,288 psi | 89% | 3025 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,751 psi | 86% | 3084 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,366 psi | 68% | 2943 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,419 psi | 89% | 3064 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,098 psi | 85% | 3051 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 56,405 psi | 90% | 3153 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,548 psi | 55% | 2838 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 88% | 55,811 psi | 89% | 3087 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 2015 | <<locked>> | 80% | 47,819 psi | 77% | 2851 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,118 psi | 64% | 2756 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,645 psi | 76% | 2927 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 52,518 psi | 84% | 2959 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 37,956 psi | 61% | 2746 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 37,057 psi | 59% | 2779 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 44,150 psi | 71% | 2874 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 37,550 psi | 60% | 2710 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,296 psi | 74% | 2887 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 46,543 psi | 75% | 2881 fps | 100% |
| Alliant Power Pro 2000-MR | 58.8 gr | 80% | 40,205 psi | 64% | 2897 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,028 psi | 59% | 2730 fps | 97.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,842 psi | 64% | 2799 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 37,202 psi | 60% | 2795 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 31,937 psi | 51% | 2680 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 94% | 31,937 psi | 51% | 2674 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 98% | 40,495 psi | 65% | 2956 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,526 psi | 70% | 2874 fps | 97.5% |
| Bofors RP3 | <<locked>> | 80% | 36,521 psi | 59% | 2726 fps | 97.7% |
| Bofors RP7 | <<locked>> | 92% | 49,037 psi | 79% | 2940 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,138 psi | 77% | 2881 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,150 psi | 72% | 2907 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,140 psi | 80% | 3064 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 82% | 40,350 psi | 65% | 2799 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 92% | 45,847 psi | 74% | 2966 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 44,585 psi | 71% | 2887 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 31,966 psi | 51% | 2625 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,727 psi | 65% | 2851 fps | 98.7% |
| Hodgdon Superformance | 72 gr | 94% | 49,559 psi | 79% | 3058 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,121 psi | 42% | 1699 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,989 psi | 69% | 2838 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 44,338 psi | 71% | 2890 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,378 psi | 63% | 2749 fps | 97% |
| IMR 4166 Enduron | <<locked>> | 84% | 47,877 psi | 77% | 2894 fps | 95.5% |
| IMR 4350 | <<locked>> | 96% | 49,197 psi | 79% | 2963 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 47,790 psi | 77% | 2917 fps | 95.4% |
| IMR 4831 | <<locked>> | 88% | 35,882 psi | 58% | 2733 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 40,828 psi | 65% | 2831 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 80% | 46,296 psi | 74% | 2887 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 43,250 psi | 69% | 2851 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 44,251 psi | 71% | 2812 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 39,146 psi | 63% | 2753 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 41,379 psi | 66% | 2795 fps | 95.2% |
| Lovex S070 | <<locked>> | 94% | 47,732 psi | 77% | 2943 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 43,062 psi | 69% | 2825 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 43,540 psi | 70% | 2838 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,189 psi | 63% | 2785 fps | 97.4% |
| Norma URP | <<locked>> | 88% | 37,362 psi | 60% | 2782 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 38,885 psi | 62% | 2799 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 94% | 44,686 psi | 72% | 2946 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 46,470 psi | 75% | 2894 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,861 psi | 74% | 2910 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,256 psi | 81% | 2943 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,484 psi | 42% | 1739 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,054 psi | 83% | 2982 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 43,511 psi | 70% | 2841 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,032 psi | 67% | 2910 fps | 97.6% |
| ReloadSwiss RS 60 | 57.9 gr | 80% | 34,084 psi | 55% | 2756 fps | 98.6% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 39,610 psi | 64% | 2861 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 39,798 psi | 64% | 2871 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 46,992 psi | 75% | 2874 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,104 psi | 66% | 2776 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 34,316 psi | 55% | 2667 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 92% | 49,037 psi | 79% | 2940 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,379 psi | 66% | 2795 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,250 psi | 69% | 2851 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 39,146 psi | 63% | 2753 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 94% | 47,732 psi | 77% | 2943 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,491 psi | 57% | 2720 fps | 96.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,657 psi | 72% | 2861 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,714 psi | 68% | 2838 fps | 98.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,570 psi | 71% | 2785 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,999 psi | 59% | 2635 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 47,021 psi | 75% | 2858 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 50,183 psi | 80% | 2972 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 44,121 psi | 71% | 2782 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,280 psi | 71% | 2861 fps | 98.5% |
| Somchem S355 | <<locked>> | 80% | 35,230 psi | 56% | 2677 fps | 96.7% |
| Somchem S365 | <<locked>> | 84% | 29,124 psi | 47% | 2598 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 50,386 psi | 81% | 2854 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,962 psi | 72% | 2779 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,480 psi | 65% | 2759 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,191 psi | 66% | 2769 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,504 psi | 54% | 2612 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 86% | 36,608 psi | 59% | 2730 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 46,398 psi | 74% | 2884 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 39,682 psi | 64% | 2749 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 38,508 psi | 62% | 2789 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 34,389 psi | 55% | 2756 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 31,923 psi | 51% | 2582 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 46,195 psi | 74% | 2933 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 46,079 psi | 74% | 2969 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 98% | 32,343 psi | 52% | 2766 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,206 psi | 68% | 2844 fps | 98.6% |
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 94 powders for .300 H&H Mag. loaded with the .308 | 146gr | Peregrine Glider (Glider GRM). ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,205 fps; across all powders the maximum-charge window runs from 1,903 fps to 3,205 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 146.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Alliant Reloder-26 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, Hodgdon Superformance, ReloadSwiss RS 60 rank at the top here: for .300 H&H Mag. with the .308 | 146gr | Peregrine Glider (Glider GRM) 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.