Forcing cone erosion

Richard93

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HI,
Can someone explain to me when a forcing cone is too worn? What are the main signs? When does it no longer work properly? For example, what can you tell me about this cone?
Thank you so much
 

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Unless you are getting a loss in accuracy I would not worry about it much. When your POI is way off your POA then you will know when it's time.

You don't mention what model, caliber or what ammo you have been shooting but it would slow down the process if you used standard velocity ammo and standard weight bullets (not light weight ones). If you are shooting a Magnum, I'd suggest switching to standard velocity ammo for paper punching and save the magnums for work that matters.
 
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It's hard to tell from that picture...is it erosion or lead build up?
 
In that picture, it's easy to tell if you know what you're looking at. Notice that the outer ring of the back face is level with the eroded ring. No buildup.
 
Your probably right...I was seeing what appeared to be a ridge where the inner ring seemed slightly elevated which made me think that it was build up.

yVyh659.jpg
 
The gun didn't shoot much, I started with commercial cartridges (maybe 1000 or so) but then moved on to my hard casts. I currently use 6 grains of HP38 with 220 grain bullet and larg pistol primers. The gun is a 629 8 3/8 and with my loads the speed is 680 fps (it's ridiculous for a 44 I know but for piercing paper it's fine) and it's super
accurate at 25 yards. I save the magnum loads for other things
 
HI,
Can someone explain to me when a forcing cone is too worn? What are the main signs? When does it no longer work properly? For example, what can you tell me about this cone?
Thank you so much
That's not severe erosion and I would not worry about it at this time. It takes many thousands of full power magnum loads to erode the barrel of an L- or N-frame revolver to the point that the barrel needs to be turned back or replaced.
 
Hi Richard,

Welcome to the Wheel-World! Enjoy the knowledge and stories you can find on this forum, there are some extremely handy guys here.(and they always answer!)

…and, to answer your question.
If bystanders, 10 feet away, complain about shrapnel, and yourself having multiple fragments in your thumb, it's time 😃

You have some kilo’s to burn! Have fun!

(yes, it is in the shop for overhaul)

regards Hans Peter
 

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Hi Richard,

Welcome to the Wheel-World! Enjoy the knowledge and stories you can find on this forum, there are some extremely handy guys here.(and they always answer!)

…and, to answer your question.
If bystanders, 10 feet away, complain about shrapnel, and yourself having multiple fragments in your thumb, it's time 😃

You have some kilo’s to burn! Have fun!

(yes, it is in the shop for overhaul)

regards Hans Peter
In your case, I see erosion and lead build up. The lead build up appears to be asymmetrical, perhaps the hand is worn and not fully rotating the cylinder into proper chamber-bore alignment or a bent yoke or crane.
 
There is more to this gun and i think the hand is the least....but thanks for your suggestions.
The front of the frame is not square and there is a fair amount of play between the yoke and the cilinder.
The last might explain why the build up is at the top.
I will start a new topic with all findings as soon as i find the "start a new topic" button.
 
There is more to this gun and i think the hand is the least....but thanks for your suggestions.
The front of the frame is not square and there is a fair amount of play between the yoke and the cilinder.
The last might explain why the build up is at the top.
I will start a new topic with all findings as soon as i find the "start a new topic" button.


Do you mean the barrel is pointing down? Could it be that the gun was fired so hard that it deformed the frame?
 

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