Prairie Whitetail with 38-55

Might be best to try flat nose cast bullets in about 20:1 or softer. You should be able to get better performance than jacketed with the softer alloy. I had a highwall in 38-55 and as mentioned, you need to check your groove diameter. Mine was .379" and with plain base cast bullets of .380" it shot under 2" @100. (Wish I didn't trade that one off:-(
I slugged the bore and it Mic's @ .377. But thats 2/3 up the barrel; above and below that are noticeably easier to push the slug through. I'm going to cast slugs with Lee's 250 gr .379 mold. Thanks for the advice
 
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