The Firing Line Forums - View Single Post - Hmmmm, what about this? = Chamfered cylinder and countersink tool.

HisSoldier · January 5, 2011, 03:58 PM

If you use "Zero flute" countersinks http://www.amazon.com/SHANK-DEGREE-S.../dp/B002J751OM you will not have chatter, which unfortunately will quickly become a minor tragedy once it starts, because you will want to continue until it is smoothed out, and then do all the other chambers the same way (Too deep) to even them up.

Even a 45 degree chamfer will shave lead balls, so, in principle, I would want a very shallow angle that would form the lead instead of shearing it. But IMHO it's a solution for a problem that wouldn't exist with underball patches and overball lube.

If one is describing a situation where the ball is actually cut undersized by the ramming process it follows that there is a burr that is below the diameter of the chamber it seems to me, in which case if you did that to a chamber with no powder the ball would slide by it's own weight fore and aft in the chamber after pushing it in the chamber.

A very light chamfer with a hand scraper would remedy that. http://milo.com/noga-black-adjustabl...scraper?aid=17

The beauty of a hand scraper is twofold, it's very controllable as to depth,and the angle you cut is totally up to you.

January 5, 2011, 03:58 PM	#8
HisSoldier Senior Member Join Date: August 9, 2007 Location: Oregoncoast Posts: 1,793	If you use "Zero flute" countersinks http://www.amazon.com/SHANK-DEGREE-S.../dp/B002J751OM you will not have chatter, which unfortunately will quickly become a minor tragedy once it starts, because you will want to continue until it is smoothed out, and then do all the other chambers the same way (Too deep) to even them up. Even a 45 degree chamfer will shave lead balls, so, in principle, I would want a very shallow angle that would form the lead instead of shearing it. But IMHO it's a solution for a problem that wouldn't exist with underball patches and overball lube. If one is describing a situation where the ball is actually cut undersized by the ramming process it follows that there is a burr that is below the diameter of the chamber it seems to me, in which case if you did that to a chamber with no powder the ball would slide by it's own weight fore and aft in the chamber after pushing it in the chamber. A very light chamfer with a hand scraper would remedy that. http://milo.com/noga-black-adjustabl...scraper?aid=17 The beauty of a hand scraper is twofold, it's very controllable as to depth,and the angle you cut is totally up to you. __________________ CNC produced 416 stainless triggers to replace the plastic triggers on Colt Mustangs, Mustang Plus II's, MK IV Government .380's and Sig P238's and P938's. Plus Colt Mustang hardened 416 guide rods, and Llama .32 and .380 recoil spring buttons, checkered nicely and blued.