Load data for .300 H&H Mag. + .308 | 150gr | Osprey Virtus

.300 H&H Mag. cartridge drawing
Virtus logo

Load Specifications

Bullet Manufacturer:Virtus
Bullet Weight:150 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:85.9 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:13.0

Load data in caliber .300 H&H Mag. with .308 | 150gr | Osprey Virtus bullet and 94 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.

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"

PowderChargeFRMaxP%V(0)z
Accurate 2015<<locked>>82%53,316 psi85%2907 fps100%
Accurate 2495<<locked>>88%55,448 psi89%2972 fps100%
Accurate 2520<<locked>>82%53,577 psi86%2989 fps100%
Accurate 2700<<locked>>88%54,752 psi88%2972 fps96.7%
Accurate 4064<<locked>>90%55,405 psi89%3022 fps100%
Accurate 4350<<locked>>98%56,159 psi90%3117 fps99.6%
ADI AR 2206H<<locked>>86%55,999 psi90%3058 fps99.9%
ADI AR 2208<<locked>>90%53,867 psi86%3009 fps99.6%
ADI Benchmark 8208<<locked>>84%54,969 psi88%3009 fps100%
Alliant AR-Comp<<locked>>84%56,173 psi90%2986 fps100%
Alliant Power Pro 2000-MR<<locked>>88%56,275 psi90%3189 fps99.9%
Alliant Reloder- TS 15.5<<locked>>90%53,838 psi86%3028 fps100%
Alliant Reloder-15<<locked>>88%54,259 psi87%3051 fps99.7%
Alliant Reloder-16<<locked>>98%53,722 psi86%3117 fps99.6%
Alliant Reloder-17<<locked>>94%54,955 psi88%3156 fps100%
Alliant Reloder-23ᴾ<<locked>>100%40,930 psi66%2884 fps98.8%
Alliant Reloder-26ᴾ<<locked>>100%46,166 psi74%3061 fps98.2%
Baschieri & Pellagri 107<<locked>>86%56,028 psi90%3074 fps99.6%
Bofors RP3<<locked>>90%54,259 psi87%3041 fps100%
Bofors RP7<<locked>>94%54,389 psi87%3009 fps96.9%
Hodgdon Benchmark<<locked>>82%53,171 psi85%2940 fps100%
Hodgdon BL-C2<<locked>>84%54,549 psi87%3038 fps100%
Hodgdon H380<<locked>>90%55,274 psi89%3054 fps99.2%
Hodgdon H414<<locked>>96%55,201 psi89%3107 fps97.7%
Hodgdon H4350<<locked>>94%55,869 psi90%3074 fps96.5%
Hodgdon H4895<<locked>>84%53,113 psi85%3015 fps99.9%
Hodgdon Hybrid 100Vᴾ<<locked>>100%53,548 psi86%3041 fps100%
Hodgdon LEVERevolution<<locked>>86%52,721 psi85%3045 fps100%
Hodgdon Superformance<<locked>>96%56,246 psi90%3150 fps97.6%
Hodgdon TrailBossᴾ<<locked>>100%35,433 psi57%1886 fps100%
Hodgdon VARGET<<locked>>86%54,389 psi87%3018 fps100%
IMR 3031<<locked>>84%53,214 psi85%3002 fps100%
IMR 4064<<locked>>88%53,200 psi85%2989 fps99.7%
IMR 4166 Enduron<<locked>>86%53,011 psi85%2963 fps97.2%
IMR 4350<<locked>>98%54,969 psi88%3038 fps97.1%
IMR 4451 Enduron<<locked>>92%53,127 psi85%2992 fps97.1%
IMR 4831<<locked>>98%52,910 psi85%3045 fps99.3%
IMR 4895<<locked>>88%55,666 psi89%3081 fps99.9%
IMR 8208 XBR<<locked>>84%54,969 psi88%3009 fps100%
Lovex D073.6<<locked>>86%56,014 psi90%3035 fps100%
Lovex S060<<locked>>86%55,535 psi89%2986 fps99.9%
Lovex S062<<locked>>90%56,376 psi90%3038 fps100%
Lovex S065<<locked>>96%55,767 psi89%3038 fps98.8%
Lovex S070<<locked>>96%53,243 psi85%3015 fps97.5%
Norma 201<<locked>>86%54,578 psi88%2999 fps100%
Norma 202<<locked>>86%55,245 psi89%3002 fps100%
Norma 203B<<locked>>88%53,476 psi86%3035 fps99.8%
Norma 204<<locked>>98%55,709 psi89%3087 fps95.9%
Norma URP<<locked>>98%54,984 psi88%3097 fps99.5%
Ramshot Big Game<<locked>>88%54,331 psi87%3061 fps99.8%
Ramshot Hunter<<locked>>98%53,824 psi86%3091 fps98.2%
Ramshot TAC<<locked>>84%55,187 psi88%3025 fps98.8%
Ramshot Wild Boar<<locked>>84%55,114 psi88%3048 fps99.9%
Ramshot X-Terminator<<locked>>82%55,796 psi89%3009 fps99.9%
ReloadSwiss RS 14ᴾ<<locked>>100%35,955 psi58%1932 fps100%
ReloadSwiss RS 50<<locked>>90%55,637 psi89%3038 fps98.2%
ReloadSwiss RS 52<<locked>>86%54,940 psi88%3120 fps99.7%
ReloadSwiss RS 60<<locked>>92%54,578 psi88%3156 fps100%
ReloadSwiss RS 62<<locked>>98%55,999 psi90%3136 fps99.5%
ReloadSwiss RS 70<<locked>>98%55,434 psi89%3166 fps99.3%
Rottweil R 901<<locked>>84%55,201 psi89%2982 fps100%
Rottweil R 902<<locked>>88%55,143 psi88%3002 fps100%
Rottweil R 903<<locked>>92%54,128 psi87%3035 fps100%
Rottweil R 907<<locked>>94%54,389 psi87%3009 fps96.9%
Shooters World Long Rifle<<locked>>96%55,767 psi89%3038 fps98.8%
Shooters World Match Rifle<<locked>>86%56,014 psi90%3035 fps100%
Shooters World Precision<<locked>>90%56,376 psi90%3038 fps100%
Shooters World SW4350<<locked>>96%53,243 psi85%3015 fps97.5%
SNPE Vectan SP 11<<locked>>92%56,405 psi90%3100 fps99.9%
SNPE Vectan SP 7<<locked>>84%53,621 psi86%2999 fps99%
SNPE Vectan SP 9<<locked>>86%54,563 psi87%3028 fps99.9%
SNPE Vectan Tubal 3000<<locked>>86%56,101 psi90%2940 fps100%
SNPE Vectan Tubal 5000<<locked>>90%53,243 psi85%2890 fps100%
SNPE Vectan Tubal 7000<<locked>>96%56,086 psi90%2989 fps97.7%
Somchem S321<<locked>>82%56,246 psi90%3041 fps100%
Somchem S335<<locked>>86%55,492 psi89%2936 fps100%
Somchem S341<<locked>>84%53,359 psi86%2992 fps99.8%
Somchem S355<<locked>>92%54,476 psi87%3031 fps100%
Somchem S365ᴾ<<locked>>100%53,185 psi85%3100 fps100%
Vihtavuori N130<<locked>>82%55,608 psi89%2900 fps100%
Vihtavuori N133<<locked>>84%53,171 psi85%2881 fps100%
Vihtavuori N135<<locked>>88%54,955 psi88%2963 fps100%
Vihtavuori N140<<locked>>88%55,796 psi89%2982 fps100%
Vihtavuori N150<<locked>>94%56,043 psi90%3012 fps100%
Vihtavuori N160<<locked>>96%54,056 psi87%3041 fps99.3%
Vihtavuori N530<<locked>>84%55,361 psi89%3005 fps100%
Vihtavuori N540<<locked>>88%54,157 psi87%2976 fps100%
Vihtavuori N550<<locked>>96%53,142 psi85%3045 fps99.1%
Vihtavuori N555ᴾ<<locked>>100%45,078 psi72%2966 fps98.7%
Winchester 6.5 StaBALL<<locked>>96%54,157 psi87%3018 fps100%
Winchester 748<<locked>>84%55,767 psi89%3061 fps100%
Winchester 760<<locked>>96%55,492 psi89%3114 fps97.8%
Winchester StaBALL HDᴾ<<locked>>100%36,535 psi59%2881 fps98.7%
Winchester StaBALL Match<<locked>>86%54,476 psi87%3035 fps100%

Recommended = one of the top powders for this cartridge and bullet combination.

Start Load - Barrel Length: 24"

PowderChargeFRMaxP%V(0)z
Accurate 2015<<locked>>80%49,937 psi80%2854 fps100%
Accurate 2495<<locked>>80%42,206 psi68%2762 fps100%
Accurate 2520<<locked>>80%49,951 psi80%2933 fps100%
Accurate 2700<<locked>>84%48,008 psi77%2854 fps95.2%
Accurate 4064<<locked>>80%39,958 psi64%2756 fps100%
Accurate 4350<<locked>>86%36,535 psi59%2740 fps95.7%
ADI AR 2206H<<locked>>80%46,238 psi74%2887 fps99.1%
ADI AR 2208<<locked>>80%39,189 psi63%2723 fps97.2%
ADI Benchmark 8208<<locked>>80%48,414 psi78%2897 fps99.9%
Alliant AR-Comp<<locked>>80%48,936 psi78%2881 fps100%
Alliant Power Pro 2000-MR<<locked>>80%42,366 psi68%2920 fps97.9%
Alliant Reloder- TS 15.5<<locked>>80%38,827 psi62%2743 fps98.5%
Alliant Reloder-15<<locked>>80%41,872 psi67%2818 fps98%
Alliant Reloder-16<<locked>>86%36,521 psi59%2756 fps95.9%
Alliant Reloder-1759.3 gr80%33,605 psi54%2703 fps96.5%
Alliant Reloder-23<<locked>>92%31,517 psi51%2641 fps95.4%
Alliant Reloder-26<<locked>>94%36,927 psi59%2841 fps95.1%
Baschieri & Pellagri 107<<locked>>80%45,730 psi73%2890 fps98.3%
Bofors RP3<<locked>>80%38,566 psi62%2746 fps98.5%
Bofors RP7<<locked>>90%48,008 psi77%2897 fps95.4%
Hodgdon Benchmark<<locked>>80%49,966 psi80%2884 fps100%
Hodgdon BL-C2<<locked>>80%47,543 psi76%2920 fps100%
Hodgdon H380<<locked>>80%39,407 psi63%2753 fps96.1%
Hodgdon H414<<locked>>90%45,092 psi72%2923 fps95.4%
Hodgdon H4350<<locked>>92%52,373 psi84%3012 fps95.8%
Hodgdon H4895<<locked>>80%46,731 psi75%2900 fps99.5%
Hodgdon Hybrid 100V<<locked>>84%31,459 psi50%2585 fps95.7%
Hodgdon LEVERevolution<<locked>>80%42,859 psi69%2867 fps99.3%
Hodgdon Superformance72.1 gr92%48,356 psi78%3009 fps95.7%
Hodgdon TrailBoss<<locked>>80%26,426 psi42%1690 fps100%
Hodgdon VARGET<<locked>>80%44,817 psi72%2848 fps99.3%
IMR 3031<<locked>>80%46,615 psi75%2897 fps100%
IMR 4064<<locked>>80%41,162 psi66%2762 fps97.9%
IMR 4166 Enduron<<locked>>82%46,528 psi75%2841 fps95.7%
IMR 4350<<locked>>94%48,399 psi78%2923 fps95.6%
IMR 4451 Enduron<<locked>>88%46,862 psi75%2877 fps95.7%
IMR 4831<<locked>>86%35,346 psi57%2694 fps95.4%
IMR 4895<<locked>>80%42,931 psi69%2851 fps98.7%
IMR 8208 XBR<<locked>>80%48,414 psi78%2897 fps99.9%
Lovex D073.6<<locked>>80%45,469 psi73%2864 fps100%
Lovex S060<<locked>>80%45,963 psi74%2822 fps99.2%
Lovex S062<<locked>>80%40,988 psi66%2762 fps99.2%
Lovex S065<<locked>>86%40,770 psi65%2756 fps95.6%
Lovex S070<<locked>>90%43,918 psi70%2841 fps95.2%
Norma 201<<locked>>80%44,976 psi72%2831 fps99.7%
Norma 202<<locked>>80%45,469 psi73%2844 fps100%
Norma 203B<<locked>>80%41,220 psi66%2805 fps98.3%
Norma 204<<locked>>96%52,083 psi84%3028 fps95%
Norma URP<<locked>>86%36,753 psi59%2740 fps95.7%
Ramshot Big Game<<locked>>80%41,089 psi66%2818 fps98.1%
Ramshot Hunter<<locked>>90%41,147 psi66%2848 fps95.2%
Ramshot TAC<<locked>>80%48,356 psi78%2904 fps97.7%
Ramshot Wild Boar<<locked>>80%47,921 psi77%2923 fps99.3%
Ramshot X-Terminator<<locked>>80%52,257 psi84%2949 fps99.7%
ReloadSwiss RS 14<<locked>>80%26,614 psi43%1726 fps100%
ReloadSwiss RS 50<<locked>>82%42,598 psi68%2795 fps95.3%
ReloadSwiss RS 52<<locked>>80%44,411 psi71%2927 fps98.4%
ReloadSwiss RS 60<<locked>>80%35,810 psi57%2779 fps99.3%
ReloadSwiss RS 62<<locked>>86%36,419 psi58%2756 fps95.3%
ReloadSwiss RS 7066.3 gr88%39,073 psi63%2831 fps95.4%
Rottweil R 901<<locked>>80%48,791 psi78%2877 fps100%
Rottweil R 902<<locked>>80%42,757 psi69%2782 fps99.4%
Rottweil R 903<<locked>>80%36,114 psi58%2684 fps97.7%
Rottweil R 907<<locked>>90%48,008 psi77%2897 fps95.4%
Shooters World Long Rifle<<locked>>86%40,770 psi65%2756 fps95.6%
Shooters World Match Rifle<<locked>>80%45,469 psi73%2864 fps100%
Shooters World Precision<<locked>>80%40,988 psi66%2762 fps99.2%
Shooters World SW4350<<locked>>90%43,918 psi70%2841 fps95.2%
SNPE Vectan SP 11<<locked>>80%37,391 psi60%2740 fps97.2%
SNPE Vectan SP 7<<locked>>80%46,673 psi75%2874 fps97.8%
SNPE Vectan SP 9<<locked>>80%44,715 psi72%2854 fps98.9%
SNPE Vectan Tubal 3000<<locked>>80%46,456 psi74%2789 fps100%
SNPE Vectan Tubal 5000<<locked>>80%38,725 psi62%2644 fps100%
SNPE Vectan Tubal 7000<<locked>>90%46,021 psi74%2815 fps95.6%
Somchem S321<<locked>>80%52,576 psi84%2982 fps100%
Somchem S335<<locked>>80%45,948 psi74%2785 fps100%
Somchem S341<<locked>>80%46,514 psi75%2874 fps99.2%
Somchem S355<<locked>>80%36,941 psi59%2694 fps97.7%
Somchem S365<<locked>>82%28,718 psi46%2562 fps96%
Vihtavuori N130<<locked>>80%52,373 psi84%2854 fps100%
Vihtavuori N133<<locked>>80%46,891 psi75%2782 fps100%
Vihtavuori N135<<locked>>80%42,540 psi68%2766 fps100%
Vihtavuori N140<<locked>>80%43,047 psi69%2772 fps100%
Vihtavuori N150<<locked>>80%35,157 psi56%2625 fps98.4%
Vihtavuori N160<<locked>>84%36,013 psi58%2687 fps95.3%
Vihtavuori N530<<locked>>80%48,530 psi78%2897 fps99.9%
Vihtavuori N540<<locked>>80%41,626 psi67%2759 fps100%
Vihtavuori N550<<locked>>86%37,840 psi61%2743 fps95.7%
Vihtavuori N555<<locked>>92%34,330 psi55%2726 fps95.6%
Winchester 6.5 StaBALL<<locked>>80%31,314 psi50%2546 fps95.8%
Winchester 748<<locked>>80%48,457 psi78%2943 fps100%
Winchester 760<<locked>>90%45,310 psi73%2927 fps95.5%
Winchester StaBALL HD<<locked>>96%31,937 psi51%2736 fps96.4%
Winchester StaBALL Match<<locked>>80%44,266 psi71%2854 fps99.2%

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.

<<locked>> you need an access license to unlock this data.

This overview compares 94 powders for .300 H&H Mag. loaded with the .308 | 150gr | Osprey Virtus. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,189 fps; across all powders the maximum-charge window runs from 1,886 fps to 3,189 fps. Alliant Reloder-23 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 57–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, Hodgdon Hybrid 100V 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .300 H&H Mag. with the .308 | 150gr | Osprey Virtus 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.

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