Otto
(.300 member)
10/12/07 02:12 AM
Re: 12 ga round ball?

Daryl, Great stuff for throwbacks like us determined to conquer the cast round ball. I'm working with a Greener police gun rifled at 1 in 80" with .728 bore and .743 grooves. This barrel was nitro proofed at 1 1/2 oz so with the modern Martini action, I consider the gun "strong". My loads are put up in either 2 1/2" Cheddite plastic hulls or 2 1/2" CBC brass cases. My chamber is 2 1/2". I'm using either .662" balls cast of pure lead or .750" balls cast of #2 alloy. The .750 balls are shot either as cast or sized to .745" but all are lubed with Lee liquid alox. The .662 balls are shot in Gualandi 1225 wads. These wads have a very short cup and don't require any fillers. Plastic cases are fold crimped and brass cases have an over shot card with lots of Elmers glue to keep em together. Even the .750" balls rattle a bit in the brass cases so I use an inverted AA base to help center the ball. Results so far are stunningly successful. Accuracy with the "issue sights" at 50 yrds tends to be one ragged hole after 3 or 4 shots. I'm pondering how to improve the sights for work at longer ranges. I want to keep the sights low low so may end up making what I need. Your many posts on this subject have been so very useful. Do you have any idea what the rifled barrel does to the pressures listed with your load data? Thanks

Otto



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