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    • #32153
      Waksupi
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      I recently traded into a .375 H&H, with a Bauska barrel. Twist appears to be 1-15.5″ Any suggestions for the best bullet weight for cast?

    • #32157
      Larry Gibson
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      Nice find. I use the Lyman 375449 GC bullet cast of COWW + 2% tin and WQ’d for my medium (1850 fps) heavy (2200 fps) duty loads in my M70 three six bits. My M70 has a 12″ twist and I can drive it to 2400 fps for occasional “full power” load practice. I get excellent accuracy using 5744 for the medium and 4895 for heavy. For a light game I was using the PB’d Lyman 375228 bullet over SR4759 for 1450 fps and excellent accuracy but with that powder no longer available I’ll rework that load with 2400 or 4227 with a Dacron filler. For camp table fare such as grouse, ptarmigan and hares I use a .375 RPB cast of 40-1 alloy or Hornady’s 375 RBs TL’d in LLA over 4 gr of Bullseye (no filler or wad) for 900 fps and excellent accuracy to at least 50 yards.

      With your barrels 15.5″ twist you’ll have no problems with stability with either bullet as they are both stabilized down to 150 fps in your barrel. The RB loads should even be better in your slower twist. Please keep us informed on your loads? Be glad to help any way I can.

      Larry Gibson

    • #32159
      Goodsteel
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      I’ve never loaded for that cartridge, but just looking at the bullet designs, I’d start with a 270-290 grain slug. I would email Tom and have him modify the 37-270E so you don’t have to use half a stick of lube for each bullet (try lube grooves in the same locations, but .010 deep and .040 wide).
      That would be a great design, and at 1.07 long, it’ll be easily stabilized by your twist rate.
      Thats my 2cents. If that doesn’t work, I’d be scratching my head real hard.

    • #32161
      Waksupi
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      Well, I will probably powder coat. My goal is pretty much towards factory specs, as I’m planning on using it for next summer’s safari rifle challenge. I was hoping for something in the 300 gr. range, so it looks like I’m traveling in the right direction. Thanks for the input!

    • #32163
      JPHolla
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      This is not really an answer to your question, but the entire reason I bought a .375 was because cartridge brass can easily be used to make bullet jackets. 223 Rem brass can make up to a 400 grain bullet; 7.62 Tokarev brass makes a good 270 grain bullet. All it takes is a pointing die. 9mm Luger brass can be sized down slightly and make about a 220 grain bullet IIRC; heavier if you make a mold that lets lead stick out beyond the brass. Just another option.

    • #32166
      skeettx
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      For my Winchester Model 70 in 375 H&H I use the Lyman 375449 and about 60 grains of old 4831, Wonderful
      Mike

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