Didn't know this

I have an older model Lyman Great Plains rifle.
Just received a new percussion lock from TOTW.
Removed the original lock from the stock and tried to put the new lock into the recess. It doesn't fit. I don't know exactly what it is in the new lock that is keeping it from fully seating into the recess inletting area. It could be in the area of the tumbler or the brindle.
Don't really want to remove anymore wood to seat it properly. I guess that I will use the parts from the new lock and use them as needed in the old lock.
Has anyone dealt with this problem before?

Most guys I know who have swapped locks say the after market lock is going to take some fitting, if I'm understand you correctly.

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Originally Posted by stick

I have an older model Lyman Great Plains rifle.
Just received a new percussion lock from TOTW.
Removed the original lock from the stock and tried to put the new lock into the recess. It doesn't fit. I don't know exactly what it is in the new lock that is keeping it from fully seating into the recess inletting area. It could be in the area of the tumbler or the brindle.

Don't really want to remove anymore wood to seat it properly. I guess that I will use the parts from the new lock and use them as needed in the old lock.
Has anyone dealt with this problem before?

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Take some dark lip stick or the soot from burning a piece of masking tape and darken up the new lock and try to fit it into the wood . You'll see where it's touching . If you think it's the plate itself strip it down and see if it fits in the existing inlet

disassemble the lock and fit the plate to the stock lock mortise by first drafting the bottom edges of the lock plate with a file, then blush the plate with candle soot (or whatever, i use prussian blue) and begin fitting it to the stock. go slow, take your time. it'll work out fine.

OK...….Took the new lock apart, and placed the lock plate into the stock. Found where it was not allowing lock to seat. Started scraping away wood. Kept repeating that until it fit. Added on more part and repeated the process, Finally am able to completely seat the lock in place. Thanks everyone for your help.

it's important to draft the lock plate during fitting.

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Originally Posted by rfd

it's important to draft the lock plate during fitting.

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Please define your meaning of "Draft".

this is mine. LOL:drinks::drinks:

filing the BOTTOM edge of the lock plate at a very slight angle. this allows the plate to "snug" into its mortise easier, tighter, and without cracking any wood. it will also allow easier filing of the plate's edging, should that be necessary.

https://i.imgur.com/dYzYQRL.png

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Originally Posted by triggerhappy243

this is mine. LOL:drinks::drinks:

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i like yers better!

https://i.imgur.com/HHeNPPn.jpg

Quote:

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Originally Posted by rfd

filing the BOTTOM edge of the lock plate at a very slight angle. this allows the plate to "snug" into its mortise easier, tighter, and without cracking any wood. it will also allow easier filing of the plate's edging, should that be necessary.

https://i.imgur.com/dYzYQRL.png

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Thanks! Makes good sense.

Been many years since I’ve built a ml but I’ve never drafted a lock. Taught me something. Thx.

a small section of one of the 8 videos jim kibler made during his assembly demo of his colonial rifle kit ...

https://www.youtube.com/watch?v=ZMDI66BjKE8