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General discussion => Gun Building => Topic started by: billd on October 02, 2011, 07:58:32 PM

Title: Lyman breech plug
Post by: billd on October 02, 2011, 07:58:32 PM
A  friend just brought me a Lyman GPR with the slotted flash hole liner, really messed up bad. Looks like some one tried to get it out with a center punch.   I don't know how these breech plugs are designed. Would there be any problem drilling it out and installing a 5/16 white lightening liner in it's place?

Thanks,
Bill
Title: Re: Lyman breech plug
Post by: mark esterly on October 02, 2011, 11:32:54 PM
i would try soaking with penetrating oil or kerosene overnight then try an easyout first.
Title: Re: Lyman breech plug
Post by: billd on October 02, 2011, 11:54:15 PM
Why bother soaking it, I can have it out in 5 minutes on the Bridgeport.  It has to be retapped.

Thanks for the suggestion,
Bill
Title: Re: Lyman breech plug
Post by: Shovelbuck on October 06, 2011, 04:30:37 AM
Probably a bit late but here's a pic of one if that helps.

(https://americanlongrifles.org/forum/proxy.php?request=http%3A%2F%2Fi22.photobucket.com%2Falbums%2Fb316%2FShovelbuck%2FGuns%2FDCP_0307.jpg&hash=ab9092e6ed3a3630a3c511cbbc6b56882a488722)
Title: Re: Lyman breech plug
Post by: D. Taylor Sapergia on October 06, 2011, 06:37:37 PM
I had the occasion to replace such a vent in a Lyman.  It was right down at the bottom and forward edge of the pan.  So I plunged a mill into the hole, after taking out the vent, moving the hole rearward as far as the existing hole would allow, and then redrilled it for a WL 5/16" liner.  It was a vast improvement.
Title: Re: Lyman breech plug
Post by: Brian on October 06, 2011, 09:44:40 PM
Quote from: D. Taylor Sapergia on October 06, 2011, 06:37:37 PM
I had the occasion to replace such a vent in a Lyman.  It was right down at the bottom and forward edge of the pan.  So I plunged a mill into the hole, after taking out the vent, moving the hole rearward as far as the existing hole would allow, and then redrilled it for a WL 5/16" liner.  It was a vast improvement.

And it works very well I might add!   ;)