Revolver forcing cone work

[velocette]

I like my firearms to be as good as I can make them within my shop and personal limitations.
Remember Clint Eastwood's comment "A mans got to know his own limitations."
So, I decided to make the forcing cones of my S&W M15 and 640 as good as I could. I rented an 11 degree forcing cone reamer from 4D Rentals in Kalispell Montana. I also took the tool to chamfer the mouth of the forcing cone.
Well, talk about easy. It took me all of less than a half hour to do both revolvers. Their forcing cones are now clean and even right up to the rifling and a tiny chamfer at the mouth.
The tools were clean, very sharp and easy to use. + 10 to 4D for fast (2 day shipping) service and top quality tools.
The 11 degree tool was chosen because I use primarily cast lead bullets in both of them, even personal defense (Buffalo Bore 158 gr, lead SWC hollow points)

 

[ontarget]

Have you tested them yet to see if performance is improved?

 

[velocette]

ontarget;
That's tomorrows duty. At my level of skill, I don't know if I will be able to tell the difference. A few more hits on the 50 yard popper maybe. The fact that the function of the revolver is as good
as I can make it was my goal. Better accuracy would be or is a nice fringe benefit.

 

[Reeferman]

I haven’t done any of my S&W revolvers but on my Ruger revolvers cutting the cones to 11 degrees made a big difference.

 

[murf]

less leading may be another fringe benefit. thanks for the info on the reamer rental.

murf

 

[35 Whelen]

I have enough revolvers, and enough of them cycle through here, that I just bought the Basic Chamfering Kit from Brownell's. Super easy job and while I've never seen an improvement in accuracy, have definitely have seen a reduction in leading, especially when coupled with a few fire-lapping bullets.

35W

 

[Drail]

There's nothing like watching a new cutter go through steel.