Load data for .378 Weath. Mag. + .375 | 260gr | Nosler Ballistic Tip

.378 Weath. Mag. cartridge drawing
Nosler logo

Load Specifications

Bullet Manufacturer:Nosler
Bullet Weight:260 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Case Length (l3):2.913"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:137 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:26"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:6.0

Load data in caliber .378 Weath. Mag. with .375 | 260gr | Nosler Ballistic Tip 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 Reloder-26, ReloadSwiss RS 70 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: 26"

PowderChargeFRMaxP%V(0)z
Accurate 2495<<locked>>82%55,999 psi88%2808 fps100%
Accurate 2700<<locked>>84%57,087 psi89%2887 fps99.3%
Accurate 3100ᴾ<<locked>>100%55,259 psi87%2933 fps99.9%
Accurate 4064<<locked>>84%56,565 psi89%2867 fps100%
Accurate 4350<<locked>>92%57,479 psi90%2986 fps100%
Accurate MAGPROᴾ<<locked>>100%57,406 psi90%3084 fps97.2%
ADI AR 2208<<locked>>86%56,405 psi88%2904 fps100%
ADI AR 2209<<locked>>96%54,636 psi86%2976 fps98.6%
ADI AR 2213ᴾ<<locked>>100%55,941 psi88%3028 fps97.8%
Alliant Power Pro 2000-MR<<locked>>82%55,825 psi87%3028 fps100%
Alliant Reloder- TS 15.5<<locked>>86%57,276 psi90%2923 fps100%
Alliant Reloder-15<<locked>>84%57,406 psi90%2946 fps100%
Alliant Reloder-16<<locked>>92%54,331 psi85%2982 fps100%
Alliant Reloder-17<<locked>>88%55,651 psi87%3009 fps100%
Alliant Reloder-19<<locked>>98%57,522 psi90%3018 fps99%
Alliant Reloder-22ᴾ<<locked>>100%54,911 psi86%3025 fps98.8%
Alliant Reloder-23ᴾ<<locked>>100%51,822 psi81%2949 fps100%
Alliant Reloder-25ᴾ<<locked>>100%45,078 psi71%2881 fps99.6%
Alliant Reloder-26<<locked>>98%55,753 psi87%3094 fps100%
Bofors RP15ᴾ<<locked>>100%50,285 psi79%2946 fps98%
Bofors RP3<<locked>>84%54,520 psi85%2890 fps100%
Bofors RP5ᴾ<<locked>>100%54,911 psi86%3025 fps98.8%
Bofors RP7<<locked>>90%57,464 psi90%2933 fps99.5%
Hodgdon H380<<locked>>84%54,868 psi86%2907 fps100%
Hodgdon H414<<locked>>90%55,695 psi87%2979 fps99.6%
Hodgdon H4350<<locked>>88%55,405 psi87%2940 fps98.9%
Hodgdon H4831<<locked>>98%56,115 psi88%2969 fps97.2%
Hodgdon H4831 SC<<locked>>98%54,897 psi86%2949 fps97%
Hodgdon Hybrid 100V<<locked>>94%54,723 psi86%2907 fps100%
Hodgdon LEVERevolution<<locked>>82%56,101 psi88%2940 fps100%
Hodgdon Retumboᴾ<<locked>>100%44,193 psi69%2917 fps97.4%
Hodgdon Superformance<<locked>>90%55,956 psi88%3018 fps99.6%
Hodgdon TrailBossᴾ<<locked>>100%36,463 psi57%1808 fps100%
Hodgdon VARGET<<locked>>82%56,768 psi89%2904 fps100%
IMR 4064<<locked>>84%55,883 psi88%2884 fps100%
IMR 4166 Enduron<<locked>>82%54,810 psi86%2867 fps99.5%
IMR 4350<<locked>>92%54,926 psi86%2910 fps99.3%
IMR 4451 Enduron<<locked>>88%55,651 psi87%2907 fps99.5%
IMR 4831<<locked>>94%57,725 psi90%2972 fps100%
IMR 4895<<locked>>82%55,405 psi87%2923 fps100%
IMR 4955 Enduron<<locked>>98%57,522 psi90%2956 fps97.6%
IMR 7828 SSCᴾ<<locked>>100%53,345 psi84%2999 fps97.4%
Lovex S060<<locked>>82%57,174 psi90%2864 fps100%
Lovex S062<<locked>>84%56,159 psi88%2877 fps100%
Lovex S065<<locked>>90%55,622 psi87%2900 fps99.9%
Lovex S070<<locked>>92%57,116 psi90%2946 fps99.8%
Lovex S071ᴾ<<locked>>100%45,948 psi72%2785 fps99.1%
Norma 201<<locked>>82%57,319 psi90%2884 fps100%
Norma 203B<<locked>>84%56,695 psi89%2933 fps100%
Norma 204<<locked>>92%55,666 psi87%2966 fps98.6%
Norma MRP<<locked>>98%54,404 psi85%3048 fps99.6%
Norma URP<<locked>>92%55,985 psi88%2966 fps100%
Ramshot Big Game<<locked>>84%57,653 psi90%2959 fps100%
Ramshot Grandᴾ<<locked>>100%53,751 psi84%3015 fps97.9%
Ramshot Hunter<<locked>>92%54,679 psi86%2969 fps99.9%
Ramshot Magnumᴾ<<locked>>100%47,921 psi75%2887 fps98.3%
ReloadSwiss RS 14ᴾ<<locked>>100%37,144 psi58%1850 fps100%
ReloadSwiss RS 50<<locked>>84%54,752 psi86%2890 fps99.7%
ReloadSwiss RS 60<<locked>>86%55,114 psi86%2999 fps100%
ReloadSwiss RS 62<<locked>>92%57,348 psi90%3009 fps100%
ReloadSwiss RS 70<<locked>>92%55,651 psi87%3038 fps100%
ReloadSwiss RS 76ᴾ<<locked>>100%44,092 psi69%2910 fps98.4%
Rottweil R 902<<locked>>82%54,694 psi86%2838 fps100%
Rottweil R 903<<locked>>86%54,737 psi86%2887 fps100%
Rottweil R 904<<locked>>96%56,202 psi88%2943 fps97.9%
Rottweil R 905<<locked>>98%56,855 psi89%3005 fps99%
Rottweil R 907<<locked>>90%57,464 psi90%2933 fps99.5%
Shooters World Long Rifle<<locked>>90%55,622 psi87%2900 fps99.9%
Shooters World Precision<<locked>>84%56,159 psi88%2877 fps100%
Shooters World SW4350<<locked>>92%57,116 psi90%2946 fps99.8%
SNPE Vectan SP 11<<locked>>86%56,289 psi88%2946 fps100%
SNPE Vectan SP 9<<locked>>82%57,174 psi90%2917 fps100%
SNPE Vectan Tubal 5000<<locked>>86%55,550 psi87%2766 fps100%
SNPE Vectan Tubal 7000<<locked>>90%55,390 psi87%2854 fps99.5%
SNPE Vectan Tubal 8000<<locked>>98%56,362 psi88%2999 fps99%
Somchem S335<<locked>>82%57,711 psi90%2805 fps100%
Somchem S355<<locked>>86%54,665 psi86%2881 fps100%
Somchem S361<<locked>>94%54,360 psi85%2881 fps96.8%
Somchem S365<<locked>>94%55,361 psi87%2966 fps100%
Somchem S385<<locked>>98%57,537 psi90%2979 fps99.5%
Vihtavuori N135<<locked>>82%55,013 psi86%2792 fps100%
Vihtavuori N140<<locked>>82%55,172 psi86%2808 fps100%
Vihtavuori N150<<locked>>88%55,970 psi88%2854 fps100%
Vihtavuori N160<<locked>>90%54,491 psi85%2907 fps100%
Vihtavuori N165ᴾ<<locked>>100%53,171 psi83%2897 fps98.8%
Vihtavuori N540<<locked>>84%56,782 psi89%2854 fps100%
Vihtavuori N550<<locked>>92%57,087 psi89%2966 fps100%
Vihtavuori N555<<locked>>98%54,360 psi85%2976 fps100%
Vihtavuori N560<<locked>>98%54,665 psi86%3038 fps97.3%
Winchester 6.5 StaBALL<<locked>>90%53,896 psi84%2871 fps100%
Winchester 760<<locked>>90%55,869 psi88%2982 fps99.6%
Winchester StaBALL HDᴾ<<locked>>100%46,891 psi73%3015 fps100%
Winchester StaBALL Match<<locked>>82%57,377 psi90%2923 fps100%
Winchester Supreme 780<<locked>>98%53,795 psi84%2913 fps98.4%

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

Start Load - Barrel Length: 26"

PowderChargeFRMaxP%V(0)z
Accurate 2495<<locked>>80%52,591 psi82%2762 fps100%
Accurate 2700<<locked>>80%50,154 psi79%2776 fps98.4%
Accurate 3100<<locked>>84%32,039 psi50%2490 fps95.4%
Accurate 4064<<locked>>80%49,850 psi78%2772 fps100%
Accurate 4350<<locked>>80%38,101 psi60%2648 fps98.8%
Accurate MAGPRO<<locked>>96%49,806 psi78%2956 fps95.6%
ADI AR 2208<<locked>>80%46,818 psi73%2746 fps100%
ADI AR 2209<<locked>>88%42,047 psi66%2743 fps95.8%
ADI AR 2213<<locked>>94%45,759 psi72%2844 fps95.4%
Alliant Power Pro 2000-MR<<locked>>80%52,011 psi82%2969 fps100%
Alliant Reloder- TS 15.5<<locked>>80%47,514 psi74%2772 fps100%
Alliant Reloder-15<<locked>>80%50,676 psi79%2841 fps100%
Alliant Reloder-16<<locked>>80%36,999 psi58%2657 fps98.9%
Alliant Reloder-1791.4 gr80%41,945 psi66%2779 fps100%
Alliant Reloder-19<<locked>>86%39,073 psi61%2677 fps95%
Alliant Reloder-22<<locked>>90%39,262 psi62%2726 fps95.2%
Alliant Reloder-23<<locked>>80%27,209 psi43%2411 fps97%
Alliant Reloder-25<<locked>>88%30,835 psi48%2533 fps95.3%
Alliant Reloder-2693.7 gr80%28,964 psi45%2520 fps95.3%
Bofors RP15<<locked>>94%41,350 psi65%2772 fps95.8%
Bofors RP3<<locked>>80%47,805 psi75%2785 fps100%
Bofors RP5<<locked>>90%39,262 psi62%2726 fps95.2%
Bofors RP7<<locked>>80%42,061 psi66%2661 fps97%
Hodgdon H380<<locked>>80%48,167 psi75%2799 fps99.8%
Hodgdon H414<<locked>>80%40,030 psi63%2694 fps97.1%
Hodgdon H4350<<locked>>80%42,844 psi67%2713 fps96.5%
Hodgdon H4831<<locked>>94%48,921 psi77%2848 fps95.6%
Hodgdon H4831 SC<<locked>>94%48,037 psi75%2835 fps95.4%
Hodgdon Hybrid 100V<<locked>>80%34,534 psi54%2546 fps99.3%
Hodgdon LEVERevolution<<locked>>80%52,605 psi82%2887 fps100%
Hodgdon Retumbo<<locked>>96%38,798 psi61%2789 fps95.4%
Hodgdon Superformance<<locked>>80%38,943 psi61%2703 fps96.4%
Hodgdon TrailBoss<<locked>>80%27,296 psi43%1614 fps100%
Hodgdon VARGET<<locked>>80%53,258 psi83%2851 fps100%
IMR 4064<<locked>>80%49,255 psi77%2779 fps100%
IMR 4166 Enduron<<locked>>80%51,459 psi81%2812 fps99.1%
IMR 4350<<locked>>80%37,666 psi59%2585 fps95.7%
IMR 4451 Enduron<<locked>>80%43,352 psi68%2687 fps97.7%
IMR 4831<<locked>>80%36,550 psi57%2598 fps98.6%
IMR 4895<<locked>>80%51,967 psi81%2871 fps100%
IMR 4955 Enduron<<locked>>92%47,688 psi75%2789 fps95.5%
IMR 7828 SSC<<locked>>96%46,659 psi73%2877 fps95.8%
Lovex S060<<locked>>80%53,867 psi84%2815 fps100%
Lovex S062<<locked>>80%49,559 psi78%2776 fps100%
Lovex S065<<locked>>80%40,973 psi64%2641 fps98.4%
Lovex S070<<locked>>80%39,160 psi61%2621 fps97%
Lovex S071<<locked>>88%31,227 psi49%2467 fps95.1%
Norma 201<<locked>>80%53,911 psi84%2835 fps100%
Norma 203B<<locked>>80%50,009 psi78%2828 fps100%
Norma 204<<locked>>84%42,467 psi67%2730 fps95.8%
Norma MRP<<locked>>86%35,955 psi56%2677 fps95.6%
Norma URP<<locked>>80%37,797 psi59%2638 fps98.7%
Ramshot Big Game<<locked>>80%50,444 psi79%2851 fps100%
Ramshot Grand<<locked>>94%43,366 psi68%2818 fps95.1%
Ramshot Hunter<<locked>>80%36,622 psi57%2625 fps96.9%
Ramshot Magnum<<locked>>94%38,566 psi60%2697 fps95.7%
ReloadSwiss RS 14<<locked>>80%27,731 psi43%1654 fps100%
ReloadSwiss RS 50<<locked>>80%48,138 psi75%2782 fps99.1%
ReloadSwiss RS 60<<locked>>80%44,570 psi70%2831 fps100%
ReloadSwiss RS 62<<locked>>80%37,884 psi59%2664 fps98.6%
ReloadSwiss RS 7092.9 gr80%36,680 psi57%2671 fps98.1%
ReloadSwiss RS 76<<locked>>94%35,679 psi56%2700 fps95.3%
Rottweil R 902<<locked>>80%51,416 psi81%2789 fps100%
Rottweil R 903<<locked>>80%45,020 psi71%2730 fps100%
Rottweil R 904<<locked>>88%43,526 psi68%2717 fps95%
Rottweil R 905<<locked>>88%40,814 psi64%2717 fps95.8%
Rottweil R 907<<locked>>80%42,061 psi66%2661 fps97%
Shooters World Long Rifle<<locked>>80%40,973 psi64%2641 fps98.4%
Shooters World Precision<<locked>>80%49,559 psi78%2776 fps100%
Shooters World SW4350<<locked>>80%39,160 psi61%2621 fps97%
SNPE Vectan SP 11<<locked>>80%46,108 psi72%2785 fps100%
SNPE Vectan SP 9<<locked>>80%53,563 psi84%2864 fps100%
SNPE Vectan Tubal 5000<<locked>>80%46,166 psi72%2631 fps100%
SNPE Vectan Tubal 7000<<locked>>80%40,147 psi63%2585 fps97.1%
SNPE Vectan Tubal 8000<<locked>>88%40,437 psi63%2713 fps95.6%
Somchem S335<<locked>>80%54,404 psi85%2762 fps100%
Somchem S355<<locked>>80%45,324 psi71%2730 fps100%
Somchem S361<<locked>>90%47,703 psi75%2766 fps95.3%
Somchem S365<<locked>>80%34,272 psi54%2598 fps99.9%
Somchem S385<<locked>>84%36,318 psi57%2585 fps95.2%
Vihtavuori N135<<locked>>80%51,590 psi81%2746 fps100%
Vihtavuori N140<<locked>>80%51,779 psi81%2762 fps100%
Vihtavuori N150<<locked>>80%43,221 psi68%2657 fps100%
Vihtavuori N160<<locked>>80%39,233 psi61%2638 fps98.9%
Vihtavuori N165<<locked>>90%38,218 psi60%2621 fps95.4%
Vihtavuori N540<<locked>>80%50,125 psi79%2759 fps100%
Vihtavuori N550<<locked>>80%38,725 psi61%2641 fps98.7%
Vihtavuori N555<<locked>>80%30,037 psi47%2490 fps97.1%
Vihtavuori N560<<locked>>94%47,761 psi75%2913 fps95.7%
Winchester 6.5 StaBALL<<locked>>80%38,290 psi60%2605 fps99.9%
Winchester 760<<locked>>80%40,147 psi63%2697 fps97.1%
Winchester StaBALL HD<<locked>>80%24,004 psi38%2379 fps95.7%
Winchester StaBALL Match<<locked>>80%53,693 psi84%2871 fps100%
Winchester Supreme 780<<locked>>90%40,770 psi64%2680 fps95.5%

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 .378 Weath. Mag. loaded with the .375 | 260gr | Nosler Ballistic Tip. Alliant Reloder-26 delivers the highest muzzle velocity at 3,094 fps; across all powders the maximum-charge window runs from 1,808 fps to 3,094 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 260.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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 Reloder-26, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for .378 Weath. Mag. with the .375 | 260gr | Nosler Ballistic Tip 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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