Load data for .300 H&H Mag. + .308 | 150gr | Norma ECO Strike

.300 H&H Mag. cartridge drawing
Norma logo

Load Specifications

Bullet Manufacturer:Norma
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:1:12.0

Load data in caliber .300 H&H Mag. with .308 | 150gr | Norma ECO Strike 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 60, Alliant Reloder-17 and Winchester 760.

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>>84%55,564 psi89%2933 fps100%
Accurate 2495<<locked>>88%53,896 psi86%2946 fps100%
Accurate 2520<<locked>>84%56,318 psi90%3025 fps100%
Accurate 2700<<locked>>88%53,635 psi86%2946 fps96.3%
Accurate 4064<<locked>>90%54,186 psi87%2999 fps100%
Accurate 4350<<locked>>98%54,563 psi87%3084 fps99.4%
ADI AR 2206H<<locked>>86%54,897 psi88%3035 fps99.9%
ADI AR 2208<<locked>>92%56,130 psi90%3035 fps99.7%
ADI Benchmark 8208<<locked>>84%53,824 psi86%2986 fps100%
Alliant AR-Comp<<locked>>84%54,708 psi88%2959 fps100%
Alliant Power Pro 2000-MR<<locked>>88%54,708 psi88%3156 fps99.7%
Alliant Reloder- TS 15.5<<locked>>92%56,043 psi90%3058 fps100%
Alliant Reloder-15<<locked>>88%53,156 psi85%3025 fps99.6%
Alliant Reloder-16ᴾ<<locked>>100%55,956 psi90%3146 fps99.7%
Alliant Reloder-17<<locked>>94%53,534 psi86%3127 fps100%
Alliant Reloder-23ᴾ<<locked>>100%39,813 psi64%2854 fps98.4%
Alliant Reloder-26ᴾ<<locked>>100%44,831 psi72%3025 fps97.7%
Baschieri & Pellagri 107<<locked>>86%54,839 psi88%3048 fps99.5%
Bofors RP3<<locked>>90%52,924 psi85%3015 fps100%
Bofors RP7<<locked>>94%53,200 psi85%2982 fps96.5%
Hodgdon Benchmark<<locked>>84%55,463 psi89%2969 fps100%
Hodgdon BL-C2<<locked>>84%53,229 psi85%3012 fps100%
Hodgdon CFE223<<locked>>82%55,245 psi89%3114 fps99.7%
Hodgdon H380<<locked>>90%54,027 psi87%3028 fps99%
Hodgdon H414<<locked>>96%53,780 psi86%3077 fps97.3%
Hodgdon H4350<<locked>>94%54,447 psi87%3041 fps96%
Hodgdon H4895<<locked>>86%55,448 psi89%3045 fps100%
Hodgdon Hybrid 100Vᴾ<<locked>>100%52,025 psi83%3012 fps99.9%
Hodgdon LEVERevolution<<locked>>88%55,187 psi88%3081 fps100%
Hodgdon Superformance<<locked>>96%54,607 psi88%3117 fps97.1%
Hodgdon TrailBossᴾ<<locked>>100%35,346 psi57%1877 fps100%
Hodgdon VARGET<<locked>>86%53,316 psi85%2995 fps99.9%
IMR 3031<<locked>>86%55,550 psi89%3031 fps100%
IMR 4064<<locked>>90%55,390 psi89%3018 fps99.8%
IMR 4166 Enduron<<locked>>88%55,492 psi89%2995 fps97.5%
IMR 4350<<locked>>98%53,708 psi86%3009 fps96.7%
IMR 4451 Enduron<<locked>>94%55,201 psi89%3018 fps97.4%
IMR 4831ᴾ<<locked>>100%55,085 psi88%3074 fps99.5%
IMR 4895<<locked>>88%54,534 psi87%3058 fps99.9%
IMR 8208 XBR<<locked>>84%53,824 psi86%2986 fps100%
Lovex D073.6<<locked>>86%54,592 psi88%3009 fps100%
Lovex S060<<locked>>86%54,491 psi87%2963 fps99.8%
Lovex S062<<locked>>90%55,274 psi89%3012 fps100%
Lovex S065<<locked>>96%54,636 psi88%3012 fps98.5%
Lovex S070<<locked>>98%55,651 psi89%3048 fps97.8%
Norma 201<<locked>>86%53,476 psi86%2976 fps100%
Norma 202<<locked>>86%54,070 psi87%2979 fps100%
Norma 203B<<locked>>90%55,927 psi90%3068 fps99.9%
Norma URP<<locked>>98%53,780 psi86%3074 fps99.3%
Ramshot Big Game<<locked>>88%52,823 psi85%3031 fps99.7%
Ramshot Hunterᴾ<<locked>>100%56,173 psi90%3123 fps98.5%
Ramshot TAC<<locked>>84%54,259 psi87%3002 fps98.6%
Ramshot Wild Boar<<locked>>84%53,882 psi86%3022 fps99.8%
Ramshot X-Terminator<<locked>>82%54,592 psi88%2982 fps99.8%
ReloadSwiss RS 14ᴾ<<locked>>100%35,897 psi58%1923 fps100%
ReloadSwiss RS 50<<locked>>90%54,534 psi87%3012 fps97.9%
ReloadSwiss RS 52<<locked>>86%53,447 psi86%3091 fps99.6%
ReloadSwiss RS 60<<locked>>92%53,403 psi86%3130 fps100%
ReloadSwiss RS 62<<locked>>98%54,346 psi87%3104 fps99.2%
ReloadSwiss RS 70<<locked>>98%53,983 psi87%3133 fps99%
Rottweil R 901<<locked>>84%54,186 psi87%2959 fps100%
Rottweil R 902<<locked>>88%53,998 psi87%2976 fps100%
Rottweil R 903<<locked>>92%52,765 psi85%3005 fps99.9%
Rottweil R 907<<locked>>94%53,200 psi85%2982 fps96.5%
Shooters World Long Rifle<<locked>>96%54,636 psi88%3012 fps98.5%
Shooters World Match Rifle<<locked>>86%54,592 psi88%3009 fps100%
Shooters World Precision<<locked>>90%55,274 psi89%3012 fps100%
Shooters World SW4350<<locked>>98%55,651 psi89%3048 fps97.8%
SNPE Vectan SP 11<<locked>>92%54,882 psi88%3074 fps99.9%
SNPE Vectan SP 7<<locked>>86%56,246 psi90%3031 fps99.2%
SNPE Vectan SP 9<<locked>>86%53,330 psi86%3002 fps99.8%
SNPE Vectan Tubal 3000<<locked>>86%55,158 psi88%2920 fps100%
SNPE Vectan Tubal 5000<<locked>>92%55,506 psi89%2917 fps100%
SNPE Vectan Tubal 7000<<locked>>96%54,781 psi88%2959 fps97.4%
Somchem S321<<locked>>82%54,955 psi88%3015 fps100%
Somchem S335<<locked>>86%54,389 psi87%2913 fps100%
Somchem S341<<locked>>86%55,927 psi90%3025 fps99.9%
Somchem S355<<locked>>92%53,432 psi86%3009 fps99.9%
Somchem S365ᴾ<<locked>>100%51,663 psi83%3074 fps100%
Vihtavuori N130<<locked>>82%54,621 psi88%2881 fps100%
Vihtavuori N133<<locked>>86%55,506 psi89%2904 fps100%
Vihtavuori N135<<locked>>88%53,911 psi86%2943 fps100%
Vihtavuori N140<<locked>>88%54,723 psi88%2959 fps100%
Vihtavuori N150<<locked>>94%54,824 psi88%2986 fps100%
Vihtavuori N160<<locked>>98%56,275 psi90%3071 fps99.4%
Vihtavuori N530<<locked>>84%54,215 psi87%2982 fps100%
Vihtavuori N540<<locked>>88%52,939 psi85%2953 fps100%
Vihtavuori N550<<locked>>98%55,317 psi89%3074 fps99.3%
Vihtavuori N555ᴾ<<locked>>100%43,671 psi70%2933 fps98.3%
Winchester 6.5 StaBALL<<locked>>96%53,084 psi85%2992 fps100%
Winchester 748<<locked>>84%54,346 psi87%3031 fps100%
Winchester 760<<locked>>96%54,027 psi87%3081 fps97.4%
Winchester StaBALL HDᴾ<<locked>>100%35,476 psi57%2841 fps98.1%
Winchester StaBALL Match<<locked>>86%53,200 psi85%3009 fps99.9%

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%48,834 psi78%2831 fps100%
Accurate 2495<<locked>>80%41,147 psi66%2740 fps100%
Accurate 2520<<locked>>80%48,762 psi78%2907 fps100%
Accurate 2700<<locked>>86%50,256 psi81%2890 fps95.6%
Accurate 4064<<locked>>80%38,957 psi62%2730 fps100%
Accurate 4350<<locked>>86%35,520 psi57%2710 fps95.2%
ADI AR 2206H<<locked>>80%45,121 psi72%2861 fps98.9%
ADI AR 2208<<locked>>80%38,392 psi62%2700 fps96.8%
ADI Benchmark 8208<<locked>>80%47,282 psi76%2871 fps99.8%
Alliant AR-Comp<<locked>>80%47,732 psi77%2861 fps100%
Alliant Power Pro 2000-MR<<locked>>80%41,176 psi66%2887 fps97.4%
Alliant Reloder- TS 15.5<<locked>>80%37,942 psi61%2720 fps98.2%
Alliant Reloder-15<<locked>>80%40,799 psi65%2789 fps97.6%
Alliant Reloder-16<<locked>>86%35,650 psi57%2726 fps95.3%
Alliant Reloder-1758 gr80%32,750 psi53%2674 fps96%
Alliant Reloder-23<<locked>>94%32,764 psi53%2671 fps95.9%
Alliant Reloder-26<<locked>>96%38,653 psi62%2881 fps95.7%
Baschieri & Pellagri 107<<locked>>80%44,541 psi71%2861 fps98%
Bofors RP3<<locked>>80%37,492 psi60%2720 fps98.2%
Bofors RP7<<locked>>90%46,905 psi75%2867 fps95%
Hodgdon Benchmark<<locked>>80%49,081 psi79%2864 fps100%
Hodgdon BL-C2<<locked>>80%46,238 psi74%2890 fps99.9%
Hodgdon CFE223<<locked>>80%51,387 psi82%3051 fps99.4%
Hodgdon H380<<locked>>80%38,421 psi62%2723 fps95.6%
Hodgdon H414<<locked>>92%47,050 psi75%2953 fps95.8%
Hodgdon H4350<<locked>>92%51,024 psi82%2979 fps95.2%
Hodgdon H4895<<locked>>80%45,585 psi73%2871 fps99.3%
Hodgdon Hybrid 100V<<locked>>84%30,618 psi49%2556 fps95.1%
Hodgdon LEVERevolution<<locked>>80%41,785 psi67%2841 fps99.1%
Hodgdon Superformance<<locked>>92%47,239 psi76%2979 fps95.2%
Hodgdon TrailBoss<<locked>>80%26,179 psi42%1677 fps100%
Hodgdon VARGET<<locked>>80%43,947 psi70%2825 fps99%
IMR 3031<<locked>>80%45,469 psi73%2871 fps100%
IMR 4064<<locked>>80%40,277 psi65%2736 fps97.6%
IMR 4166 Enduron<<locked>>82%45,759 psi73%2822 fps95.3%
IMR 4350<<locked>>94%47,369 psi76%2894 fps95.1%
IMR 4451 Enduron<<locked>>88%45,730 psi73%2844 fps95.2%
IMR 4831<<locked>>88%36,883 psi59%2726 fps95.8%
IMR 4895<<locked>>80%41,814 psi67%2822 fps98.4%
IMR 8208 XBR<<locked>>80%47,282 psi76%2871 fps99.8%
Lovex D073.6<<locked>>80%44,338 psi71%2838 fps100%
Lovex S060<<locked>>80%45,092 psi72%2799 fps98.9%
Lovex S062<<locked>>80%40,074 psi64%2736 fps99%
Lovex S065<<locked>>86%39,827 psi64%2730 fps95.1%
Lovex S070<<locked>>92%45,745 psi73%2871 fps95.6%
Norma 201<<locked>>80%44,034 psi71%2808 fps99.5%
Norma 202<<locked>>80%44,483 psi71%2822 fps100%
Norma 203B<<locked>>80%40,147 psi64%2776 fps98%
Norma URP<<locked>>86%35,795 psi57%2713 fps95.1%
Ramshot Big Game<<locked>>80%39,871 psi64%2785 fps97.7%
Ramshot Hunter<<locked>>92%42,873 psi69%2877 fps95.5%
Ramshot TAC<<locked>>80%47,427 psi76%2877 fps97.4%
Ramshot Wild Boar<<locked>>80%46,891 psi75%2897 fps99.1%
Ramshot X-Terminator<<locked>>80%51,256 psi82%2927 fps99.6%
ReloadSwiss RS 14<<locked>>80%26,556 psi43%1719 fps100%
ReloadSwiss RS 50<<locked>>84%44,498 psi71%2828 fps95.7%
ReloadSwiss RS 52<<locked>>80%43,192 psi69%2897 fps98.1%
ReloadSwiss RS 6058 gr80%34,896 psi56%2746 fps99%
ReloadSwiss RS 62<<locked>>88%38,043 psi61%2789 fps95.7%
ReloadSwiss RS 70<<locked>>90%40,799 psi65%2867 fps95.9%
Rottweil R 901<<locked>>80%47,979 psi77%2858 fps100%
Rottweil R 902<<locked>>80%42,032 psi67%2762 fps99.2%
Rottweil R 903<<locked>>80%35,201 psi56%2657 fps97.3%
Rottweil R 907<<locked>>90%46,905 psi75%2867 fps95%
Shooters World Long Rifle<<locked>>86%39,827 psi64%2730 fps95.1%
Shooters World Match Rifle<<locked>>80%44,338 psi71%2838 fps100%
Shooters World Precision<<locked>>80%40,074 psi64%2736 fps99%
Shooters World SW4350<<locked>>92%45,745 psi73%2871 fps95.6%
SNPE Vectan SP 11<<locked>>80%36,405 psi58%2713 fps96.8%
SNPE Vectan SP 7<<locked>>80%45,658 psi73%2848 fps97.5%
SNPE Vectan SP 9<<locked>>80%43,685 psi70%2825 fps98.6%
SNPE Vectan Tubal 3000<<locked>>80%45,484 psi73%2766 fps100%
SNPE Vectan Tubal 5000<<locked>>80%37,840 psi61%2621 fps100%
SNPE Vectan Tubal 7000<<locked>>90%44,947 psi72%2785 fps95.1%
Somchem S321<<locked>>80%51,285 psi82%2956 fps100%
Somchem S335<<locked>>80%45,034 psi72%2766 fps100%
Somchem S341<<locked>>80%45,310 psi73%2844 fps98.9%
Somchem S355<<locked>>80%36,114 psi58%2667 fps97.3%
Somchem S365<<locked>>82%27,905 psi45%2533 fps95.3%
Vihtavuori N130<<locked>>80%51,358 psi82%2831 fps100%
Vihtavuori N133<<locked>>80%45,905 psi74%2759 fps100%
Vihtavuori N135<<locked>>80%41,510 psi67%2743 fps100%
Vihtavuori N140<<locked>>80%42,148 psi68%2753 fps100%
Vihtavuori N150<<locked>>80%34,360 psi55%2602 fps98.1%
Vihtavuori N160<<locked>>86%37,565 psi60%2720 fps95.7%
Vihtavuori N530<<locked>>80%47,413 psi76%2867 fps99.8%
Vihtavuori N540<<locked>>80%40,596 psi65%2736 fps99.9%
Vihtavuori N550<<locked>>86%36,956 psi59%2717 fps95.3%
Vihtavuori N555<<locked>>92%33,228 psi53%2694 fps95%
Winchester 6.5 StaBALL<<locked>>80%30,487 psi49%2513 fps95.2%
Winchester 748<<locked>>80%47,282 psi76%2917 fps100%
Winchester 76065.4 gr92%47,253 psi76%2959 fps95.8%
Winchester StaBALL HD<<locked>>96%31,067 psi50%2697 fps95.5%
Winchester StaBALL Match<<locked>>80%43,221 psi69%2828 fps99%

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 | Norma ECO Strike. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,877 fps to 3,156 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 57–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:12.0 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. ReloadSwiss RS 60, Alliant Reloder-17, Winchester 760 rank at the top here: for .300 H&H Mag. with the .308 | 150gr | Norma ECO Strike 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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