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

.300 Weath. Mag. cartridge drawing
Norma logo

Load Specifications

Bullet Manufacturer:Norma
Bullet Weight:150 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Case Length (l3):2.824"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:98.9 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:12.0

Load data in caliber .300 Weath. 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, ReloadSwiss RS 70 and Hodgdon H414.

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"

PowderChargeFRMaxP%V(0)z
Accurate 2495<<locked>>84%55,608 psi87%3025 fps100%
Accurate 2700<<locked>>84%53,998 psi85%3035 fps97.7%
Accurate 3100ᴾ<<locked>>100%51,213 psi80%3061 fps98.7%
Accurate 4064<<locked>>86%56,057 psi88%3081 fps100%
Accurate 4350<<locked>>94%57,377 psi90%3192 fps100%
ADI AR 2206H<<locked>>82%55,608 psi87%3114 fps100%
ADI AR 2208<<locked>>88%56,826 psi89%3120 fps100%
ADI AR 2209<<locked>>98%55,013 psi86%3169 fps97.1%
Alliant Power Pro 2000-MR<<locked>>84%56,246 psi88%3251 fps100%
Alliant Power Pro Varmint<<locked>>98%54,955 psi86%3166 fps97.1%
Alliant Reloder- TS 15.5<<locked>>88%57,609 psi90%3146 fps100%
Alliant Reloder-15<<locked>>84%54,230 psi85%3110 fps100%
Alliant Reloder-16<<locked>>94%54,549 psi85%3196 fps100%
Alliant Reloder-17<<locked>>90%55,898 psi88%3222 fps100%
Alliant Reloder-19<<locked>>98%54,172 psi85%3156 fps97%
Alliant Reloder-22ᴾ<<locked>>100%51,256 psi80%3146 fps96.6%
Alliant Reloder-23ᴾ<<locked>>100%48,327 psi76%3087 fps100%
Alliant Reloder-25ᴾ<<locked>>100%42,047 psi66%2982 fps97.5%
Alliant Reloder-26ᴾ<<locked>>100%55,898 psi88%3297 fps100%
Baschieri & Pellagri 107<<locked>>82%55,680 psi87%3130 fps99.9%
Bofors RP3<<locked>>86%54,708 psi86%3104 fps100%
Bofors RP5ᴾ<<locked>>100%51,256 psi80%3146 fps96.6%
Bofors RP7<<locked>>90%54,302 psi85%3081 fps97.9%
Hodgdon H380<<locked>>86%55,172 psi86%3117 fps99.7%
Hodgdon H414<<locked>>92%56,043 psi88%3186 fps98.7%
Hodgdon H4350<<locked>>90%55,854 psi88%3143 fps97.6%
Hodgdon H4895<<locked>>82%56,217 psi88%3127 fps100%
Hodgdon Hybrid 100V<<locked>>96%54,839 psi86%3117 fps100%
Hodgdon LEVERevolution<<locked>>84%56,579 psi89%3163 fps100%
Hodgdon Superformance<<locked>>92%56,565 psi89%3225 fps98.6%
Hodgdon TrailBossᴾ<<locked>>100%36,100 psi57%1969 fps100%
Hodgdon VARGET<<locked>>84%57,464 psi90%3130 fps100%
IMR 3031<<locked>>82%56,695 psi89%3104 fps100%
IMR 4064<<locked>>86%56,347 psi88%3104 fps100%
IMR 4166 Enduron<<locked>>84%55,477 psi87%3077 fps98.5%
IMR 4350<<locked>>94%55,448 psi87%3114 fps98.2%
IMR 4451 Enduron<<locked>>90%56,217 psi88%3114 fps98.6%
IMR 4831<<locked>>94%54,099 psi85%3123 fps99.8%
IMR 4895<<locked>>84%55,666 psi87%3143 fps100%
Lovex D073.6<<locked>>82%55,854 psi88%3084 fps100%
Lovex S060<<locked>>82%54,578 psi86%3038 fps100%
Lovex S062<<locked>>86%56,275 psi88%3094 fps100%
Lovex S065<<locked>>92%55,869 psi88%3107 fps99.4%
Lovex S070<<locked>>94%57,159 psi90%3150 fps98.9%
Lovex S071ᴾ<<locked>>100%42,235 psi66%2890 fps96.8%
Norma 201<<locked>>84%57,624 psi90%3107 fps100%
Norma 202<<locked>>82%54,940 psi86%3054 fps100%
Norma 203B<<locked>>86%57,058 psi89%3153 fps100%
Norma 204<<locked>>94%56,130 psi88%3166 fps97.2%
Norma MRPᴾ<<locked>>100%54,491 psi85%3238 fps98.5%
Norma URP<<locked>>94%55,941 psi88%3173 fps99.9%
Ramshot Big Game<<locked>>84%54,302 psi85%3120 fps100%
Ramshot Hunter<<locked>>94%54,839 psi86%3169 fps99.1%
ReloadSwiss RS 14ᴾ<<locked>>100%36,637 psi57%2011 fps100%
ReloadSwiss RS 50<<locked>>86%55,303 psi87%3100 fps98.9%
ReloadSwiss RS 52<<locked>>82%55,042 psi86%3179 fps100%
ReloadSwiss RS 60<<locked>>88%55,405 psi87%3219 fps100%
ReloadSwiss RS 62<<locked>>94%57,377 psi90%3212 fps99.9%
ReloadSwiss RS 70<<locked>>94%56,072 psi88%3241 fps99.8%
Rottweil R 902<<locked>>84%54,636 psi86%3051 fps100%
Rottweil R 903<<locked>>88%54,592 psi86%3097 fps100%
Rottweil R 904<<locked>>98%56,724 psi89%3140 fps96.3%
Rottweil R 905ᴾ<<locked>>100%57,000 psi89%3202 fps97.7%
Rottweil R 907<<locked>>90%54,302 psi85%3081 fps97.9%
Shooters World Long Rifle<<locked>>92%55,869 psi88%3107 fps99.4%
Shooters World Match Rifle<<locked>>82%55,854 psi88%3084 fps100%
Shooters World Precision<<locked>>86%56,275 psi88%3094 fps100%
Shooters World SW4350<<locked>>94%57,159 psi90%3150 fps98.9%
SNPE Vectan SP 11<<locked>>88%56,536 psi89%3159 fps100%
SNPE Vectan SP 7<<locked>>82%56,898 psi89%3117 fps99.8%
SNPE Vectan SP 9<<locked>>82%54,012 psi85%3081 fps100%
SNPE Vectan Tubal 3000<<locked>>82%55,201 psi87%2989 fps100%
SNPE Vectan Tubal 5000<<locked>>88%55,999 psi88%2986 fps100%
SNPE Vectan Tubal 7000<<locked>>92%55,854 psi88%3054 fps98.6%
SNPE Vectan Tubal 8000ᴾ<<locked>>100%56,492 psi89%3196 fps97.6%
Somchem S335<<locked>>82%54,694 psi86%2982 fps100%
Somchem S341<<locked>>82%56,637 psi89%3104 fps100%
Somchem S355<<locked>>88%54,824 psi86%3094 fps100%
Somchem S365<<locked>>96%55,245 psi87%3176 fps100%
Somchem S385ᴾ<<locked>>100%57,667 psi90%3173 fps98.5%
Vihtavuori N133<<locked>>82%55,724 psi87%2972 fps100%
Vihtavuori N135<<locked>>84%55,085 psi86%3015 fps100%
Vihtavuori N140<<locked>>84%55,477 psi87%3031 fps100%
Vihtavuori N150<<locked>>90%56,144 psi88%3068 fps100%
Vihtavuori N160<<locked>>92%54,737 psi86%3114 fps99.8%
Vihtavuori N165ᴾ<<locked>>100%49,705 psi78%3022 fps96.6%
Vihtavuori N540<<locked>>86%57,377 psi90%3077 fps100%
Vihtavuori N550<<locked>>94%57,377 psi90%3173 fps99.9%
Vihtavuori N555ᴾ<<locked>>100%53,882 psi84%3169 fps100%
Winchester 6.5 StaBALL<<locked>>92%54,520 psi85%3081 fps100%
Winchester 760<<locked>>92%56,304 psi88%3189 fps98.7%
Winchester StaBALL HDᴾ<<locked>>100%43,555 psi68%3130 fps100%
Winchester StaBALL Match<<locked>>82%54,230 psi85%3091 fps100%
Winchester Supreme 780ᴾ<<locked>>100%54,346 psi85%3110 fps97%

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

Start Load - Barrel Length: 24"

PowderChargeFRMaxP%V(0)z
Accurate 2495<<locked>>80%48,559 psi76%2917 fps100%
Accurate 2700<<locked>>80%47,355 psi74%2913 fps96.2%
Accurate 3100<<locked>>92%38,682 psi61%2812 fps95.6%
Accurate 4064<<locked>>80%46,021 psi72%2917 fps100%
Accurate 4350<<locked>>80%34,737 psi54%2740 fps96%
ADI AR 2206H<<locked>>80%51,953 psi81%3054 fps100%
ADI AR 2208<<locked>>80%44,106 psi69%2887 fps99%
ADI AR 2209<<locked>>94%48,153 psi75%3041 fps95.4%
Alliant Power Pro 2000-MR<<locked>>80%48,733 psi76%3117 fps99.7%
Alliant Power Pro Varmint<<locked>>94%48,138 psi75%3041 fps95.5%
Alliant Reloder- TS 15.5<<locked>>80%44,425 psi70%2917 fps99.8%
Alliant Reloder-15<<locked>>80%47,442 psi74%2986 fps99.5%
Alliant Reloder-16<<locked>>80%34,461 psi54%2759 fps96.2%
Alliant Reloder-17<<locked>>80%38,986 psi61%2897 fps99.1%
Alliant Reloder-19<<locked>>94%47,529 psi74%3031 fps95.4%
Alliant Reloder-22<<locked>>98%47,921 psi75%3084 fps95.7%
Alliant Reloder-23<<locked>>86%30,327 psi48%2657 fps96.1%
Alliant Reloder-25<<locked>>96%36,941 psi58%2854 fps95.6%
Alliant Reloder-26<<locked>>88%35,462 psi56%2858 fps95.9%
Baschieri & Pellagri 107<<locked>>80%52,040 psi82%3068 fps99.7%
Bofors RP3<<locked>>80%44,382 psi70%2920 fps99.8%
Bofors RP5<<locked>>98%47,921 psi75%3084 fps95.7%
Bofors RP7<<locked>>84%44,744 psi70%2897 fps95.8%
Hodgdon H380<<locked>>80%44,962 psi70%2930 fps98.4%
Hodgdon H41469.7 gr84%42,540 psi67%2927 fps95.8%
Hodgdon H4350<<locked>>84%45,861 psi72%2956 fps95.3%
Hodgdon H4895<<locked>>80%52,518 psi82%3064 fps100%
Hodgdon Hybrid 100V<<locked>>80%31,763 psi50%2644 fps96.9%
Hodgdon LEVERevolution<<locked>>80%49,226 psi77%3041 fps100%
Hodgdon Superformance<<locked>>84%42,032 psi66%2943 fps95.1%
Hodgdon TrailBoss<<locked>>80%26,818 psi42%1759 fps100%
Hodgdon VARGET<<locked>>80%50,357 psi79%3012 fps100%
IMR 3031<<locked>>80%53,214 psi83%3051 fps100%
IMR 4064<<locked>>80%46,369 psi73%2927 fps99.5%
IMR 4166 Enduron<<locked>>80%48,863 psi77%2959 fps97.4%
IMR 4350<<locked>>86%42,743 psi67%2871 fps95.2%
IMR 4451 Enduron<<locked>>80%40,959 psi64%2815 fps95.1%
IMR 4831<<locked>>80%33,605 psi53%2694 fps95.7%
IMR 4895<<locked>>80%48,704 psi76%3018 fps99.8%
Lovex D073.6<<locked>>80%52,083 psi82%3025 fps100%
Lovex S060<<locked>>80%51,213 psi80%2982 fps100%
Lovex S062<<locked>>80%46,528 psi73%2930 fps100%
Lovex S065<<locked>>80%38,159 psi60%2756 fps95.8%
Lovex S070<<locked>>84%41,437 psi65%2848 fps95.7%
Lovex S071<<locked>>96%36,999 psi58%2769 fps95%
Norma 201<<locked>>80%50,647 psi79%2995 fps100%
Norma 202<<locked>>80%51,474 psi81%2999 fps100%
Norma 203B<<locked>>80%46,804 psi73%2972 fps99.7%
Norma 204<<locked>>90%48,907 psi77%3035 fps95.5%
Norma MRP<<locked>>92%40,988 psi64%2963 fps95%
Norma URP<<locked>>80%34,882 psi55%2740 fps96%
Ramshot Big Game<<locked>>80%47,297 psi74%2995 fps99.7%
Ramshot Hunter<<locked>>84%39,001 psi61%2851 fps95.6%
ReloadSwiss RS 14<<locked>>80%27,195 psi43%1798 fps100%
ReloadSwiss RS 50<<locked>>80%45,136 psi71%2910 fps97.1%
ReloadSwiss RS 52<<locked>>80%51,459 psi81%3117 fps99.8%
ReloadSwiss RS 6067.9 gr80%41,495 psi65%2966 fps100%
ReloadSwiss RS 62<<locked>>80%34,635 psi54%2753 fps95.6%
ReloadSwiss RS 7070.7 gr82%36,579 psi57%2831 fps95.8%
Rottweil R 902<<locked>>80%48,225 psi76%2943 fps100%
Rottweil R 903<<locked>>80%41,698 psi65%2861 fps99.4%
Rottweil R 904<<locked>>96%53,113 psi83%3081 fps95.5%
Rottweil R 905<<locked>>94%46,427 psi73%3009 fps95.3%
Rottweil R 907<<locked>>84%44,744 psi70%2897 fps95.8%
Shooters World Long Rifle<<locked>>80%38,159 psi60%2756 fps95.8%
Shooters World Match Rifle<<locked>>80%52,083 psi82%3025 fps100%
Shooters World Precision<<locked>>80%46,528 psi73%2930 fps100%
Shooters World SW4350<<locked>>84%41,437 psi65%2848 fps95.7%
SNPE Vectan SP 11<<locked>>80%43,221 psi68%2920 fps99.2%
SNPE Vectan SP 7<<locked>>80%53,098 psi83%3054 fps99.5%
SNPE Vectan SP 9<<locked>>80%50,691 psi79%3025 fps99.9%
SNPE Vectan Tubal 3000<<locked>>80%51,663 psi81%2933 fps100%
SNPE Vectan Tubal 5000<<locked>>80%43,497 psi68%2789 fps100%
SNPE Vectan Tubal 7000<<locked>>82%40,016 psi63%2756 fps95.1%
SNPE Vectan Tubal 8000<<locked>>94%46,006 psi72%3002 fps95.1%
Somchem S335<<locked>>80%51,358 psi80%2930 fps100%
Somchem S341<<locked>>80%52,895 psi83%3045 fps100%
Somchem S355<<locked>>80%42,206 psi66%2864 fps99.4%
Somchem S365<<locked>>80%31,372 psi49%2690 fps98.1%
Somchem S385<<locked>>92%44,077 psi69%2927 fps95.6%
Vihtavuori N133<<locked>>80%52,228 psi82%2920 fps100%
Vihtavuori N135<<locked>>80%48,341 psi76%2913 fps100%
Vihtavuori N140<<locked>>80%48,747 psi76%2927 fps100%
Vihtavuori N150<<locked>>80%40,306 psi63%2792 fps99.8%
Vihtavuori N160<<locked>>80%36,289 psi57%2746 fps96.5%
Vihtavuori N165<<locked>>98%46,456 psi73%2963 fps95.8%
Vihtavuori N540<<locked>>80%47,065 psi74%2913 fps100%
Vihtavuori N550<<locked>>80%35,752 psi56%2743 fps96%
Vihtavuori N555<<locked>>84%31,082 psi49%2674 fps95.1%
Winchester 6.5 StaBALL<<locked>>80%35,824 psi56%2720 fps98.5%
Winchester 760<<locked>>84%42,728 psi67%2930 fps95.8%
Winchester StaBALL HD<<locked>>88%28,572 psi45%2680 fps95.8%
Winchester StaBALL Match<<locked>>80%50,647 psi79%3028 fps100%
Winchester Supreme 780<<locked>>96%47,065 psi74%2979 fps95.2%

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 Weath. Mag. loaded with the .308 | 150gr | Norma ECO Strike. Alliant Reloder-26 delivers the highest muzzle velocity at 3,297 fps; across all powders the maximum-charge window runs from 1,969 fps to 3,297 fps. Accurate 3100 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 (440 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. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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, ReloadSwiss RS 70, Hodgdon H414 rank at the top here: for .300 Weath. 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.

← All load data