I've been loading for a Model '92 in 44/40 for the last year, or so. It is in good shape and has a new Green Mountain barrel installed. I called them and they confirmed all of their "44" barrels come rifled for .429" bullets. I'm having a lot of problems getting rounds to feed from the magazine and I finally figured out why.
The Winchester factory CAS loads I bought cycle very well but mine do not, so I got out the micrometer and started taking measurements. Yep...you guessed it! The factory ammo is loaded with .427" bullets, which results in the slight bottle-neck on this old round being almost .005" smaller in diameter than my handloads. That is just enough difference for my loads to stovepipe going from the loading gate to the chamber, while the factory stuff goes right in. I can single-feed mine just fine and they slide easily all the way into the chamber...they just can't make that angled turn from the action to the mouth of the chamber without getting bound up.
I'm considering trimming all the cases back about .010" to see if that is enough to allow them to feed properly. Any other thoughts on how I can fix this?
The Winchester factory CAS loads I bought cycle very well but mine do not, so I got out the micrometer and started taking measurements. Yep...you guessed it! The factory ammo is loaded with .427" bullets, which results in the slight bottle-neck on this old round being almost .005" smaller in diameter than my handloads. That is just enough difference for my loads to stovepipe going from the loading gate to the chamber, while the factory stuff goes right in. I can single-feed mine just fine and they slide easily all the way into the chamber...they just can't make that angled turn from the action to the mouth of the chamber without getting bound up.
I'm considering trimming all the cases back about .010" to see if that is enough to allow them to feed properly. Any other thoughts on how I can fix this?