629 forcing cone

Sailormilan2 · 05-01-2017, 06:01 AM

I have a 6" 629 that I have never been impressed with the accuracy of. I recently got a Brownells forcing cone plug to measure the forcing cone. It turns out the cone is so loose, the plug literally falls in to a depth of about .090". It is so loose that I can insert a .452 cal SWC bullet into the cone and it will go in the entire depth of the front driving band. It has quit a few reaming marks as well.
I have given thoughts of trying to clean it up, but I'm afraid to make it any looser.
I recently located a new, never mounted 4" barrel, and I was going to install it, until I found it has the exact same problem.
So, it appears that both barrels need to be turned in at least 2 threads. While I am pretty sure I can do it on my lathe, my skills with the lathe are not that great.
Can anyone point me in a direction of a smith that might be able to take enough off the shoulders so that they can be screwed in 2 extra turns?
TIA

dfariswheel · 05-01-2017, 04:58 PM

Frank Glenn is a Master.
Work is top quality, price is excellent.

Frank Glenn-Glenn Custom Complete Gunsmithing Service Glendale AZ

You might also check with S&W for a price. If the barrel is out of factory spec they might give you a break on it.

05-01-2017, 06:01 AM	#1
Sailormilan2 Junior Member Join Date: Dec 2016 Location: Central CA Posts: 1	629 forcing cone I have a 6" 629 that I have never been impressed with the accuracy of. I recently got a Brownells forcing cone plug to measure the forcing cone. It turns out the cone is so loose, the plug literally falls in to a depth of about .090". It is so loose that I can insert a .452 cal SWC bullet into the cone and it will go in the entire depth of the front driving band. It has quit a few reaming marks as well. I have given thoughts of trying to clean it up, but I'm afraid to make it any looser. I recently located a new, never mounted 4" barrel, and I was going to install it, until I found it has the exact same problem. So, it appears that both barrels need to be turned in at least 2 threads. While I am pretty sure I can do it on my lathe, my skills with the lathe are not that great. Can anyone point me in a direction of a smith that might be able to take enough off the shoulders so that they can be screwed in 2 extra turns? TIA

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Barrel is turned	joken	Smith & Wesson Revolvers	2	06-08-2016 05:19 PM

05-01-2017, 04:58 PM	#2
dfariswheel Senior Member Join Date: Jun 2001 Posts: 1,800	Frank Glenn is a Master. Work is top quality, price is excellent. Frank Glenn-Glenn Custom Complete Gunsmithing Service Glendale AZ You might also check with S&W for a price. If the barrel is out of factory spec they might give you a break on it.