Kevin Stenberg
Well-Known Member
I purchased a Savage barrel that came off of an axis rifle. I made a chamber cast of the barrel tonight and I am kind of concerned about the # I am geting.
Hornady manual says the shoulder dia. should be .454 The base of the neck should be .343 and the mouth should be .343 My chamber cast has a shoulder of ..4585 the base of the throat is .347 and the end of the throat is .345 Those aren't too bad but when I go past the throat it gets awful small.
At the mouth of the cartridge there is a decrease to the dia. of .3095/.310 This decrease is done in a .033" length. There is a smooth transition from the .3095 down to .308 in a distance of .244" which is the start of the rifling. From the start of the rifling cuts to the deepest of the rifling the .308 decreases to .3065 Isn't .3065 awfully small for cast bullets?
I was also concerned that the gruves are only .034 wide. But there are 6 of them
Hornady manual says the shoulder dia. should be .454 The base of the neck should be .343 and the mouth should be .343 My chamber cast has a shoulder of ..4585 the base of the throat is .347 and the end of the throat is .345 Those aren't too bad but when I go past the throat it gets awful small.
At the mouth of the cartridge there is a decrease to the dia. of .3095/.310 This decrease is done in a .033" length. There is a smooth transition from the .3095 down to .308 in a distance of .244" which is the start of the rifling. From the start of the rifling cuts to the deepest of the rifling the .308 decreases to .3065 Isn't .3065 awfully small for cast bullets?
I was also concerned that the gruves are only .034 wide. But there are 6 of them
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