I bought an old 7mm Mauser. The bore isn't perfect but for the age doesn't look bad either. I finally was able to take it out and try some reloads and @ 50 Yards it wasn't even on paper. The rounds were all over the place.
I started with 10g. of unique and 130g Lee 7mm lead bullet,
tried 10g. Unique w/ 145g RCBS 7mm lead bullet and when those were way off I shot 36.0g Varget w/ 140g jacketed bullet.
All were bad. When I got home I discovered lead on my muzzel so I slugged the barrel and it came out .287 at the widest point and .277 at the narrowest point. I'm looking for options on what to do to correct this. I really don't want to have a custom mould made for this old of a weapon!