Cast bullets for 375 Winchester

[Dutch4122]

Now I am really wondering what size to use in my winchester model bb in .375 winchester. I read in Pet loads that you needed to size to .377 size but you are saying here that .379 will work. Did they really size that much diffferent? No I don't have an easy way to size the bores to find out. Any ideas would be great as I really like this caliber. I have a 26 inch barrel that just loves to be shot on one of my model 94 BB.
thanks

Try measuring the inside diameter of a fired casing. That will give you an idea of how fat the chamber/throat area is. Then just size your boolits to .001" less than the measurement you get. Example: if the inside diameter of the fired case mouth measures .380" then you should size your boolits to .379".

This method is usually a lot easier than slugging bores and hasn't let me down yet with leverguns.

Hope this helps,