629 forcing cone

Sailormilan2 · 05-01-2017, 07:01 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, 05:58 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, 07:01 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

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05-01-2017, 05:58 PM	#2
dfariswheel Senior Member Join Date: Jun 2001 Posts: 1,801	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.