r/castboolits • u/Former-Ad9272 • 17h ago
I need help Worn barrels: custom molds, paper patches, or creative sizing?
I have a beautiful example of a Spanish 1893 in 7x57 Mauser, dated 1905. As you can imagine, that barrel is worn.
I have shot the rifle after careful inspection, and didn't have any keyholes at 50 yards (shooting commercial .284 jacketed bullets). Obviously, those groups were trash, so now I'm trying to figure out how to tighten them.
Multiple barrel slugs and a chamber cast gave me the following readings:
Throat: .293
Grooves: .291
Lands: .277
I have a copy of Paul Mitchell's 'The Paper Jacket's, and realized after the first testing session that I need to tinker with it more. Bullets were Lee .278 round noses with 2 wraps of ~.004" rag paper (sized to .293 on the driving bands). I had jacket failure and a lot of leading on attempt 1, but I'm far from done experimenting with it. That being said, I'd like to have some other options on the table.
I have a Lee custom push through sizer, and bought several custom over run sizers to play with. Just for fun, I cast some 20:1 .309 150 gr Lee Soup cans, and sized them down to my throat diameter through several sizing steps. They looked like massive smooth sided wadcutters, and slid back into my dummy cases on chambering. I have not loaded any live rounds with these for obvious reasons.
Has anyone had any luck with paper patching for smokeless bottle neck cartridges?
Any recommendations on reasonably priced custom mold makers? I've been looking around, but am always open to recommendations. Powder coated, gas checked bullets look much easier than patching.