Need help finding a simple solution.....

by Otony, Friday, September 02, 2022, 00:14 (814 days ago) @ Gunner

Lee makes their classic sizing die in .376, which might work for you, but it would probably be best to do a chamber cast plus slug the bore before proceeding any further. Some of those Marlin throats and chambers have been know to be cut incorrectly.

If, however, the .375 bullets really work well with everything as is, I can’t imagine sizing the .380s to .376 wouldn’t work very nicely. If all else fails, the next size down in the Lee line is .358, and that could be easily opened up to whatever size you need. I’m certain there are a few fellows here who could manage that little bit of machine work pretty much blindfolded!

Otony