Hi guys, im putting together a LH precussion Hawken rifle using a new Investarm stock as a base and 32” Bobby Hoyt 54 cal PRB barrel. Does anyone know if there are drop in LH locks that fit this stock. In having difficulty finding LH Investarm lock. Suppose Lyman GPH would fit but its pricy. I will go this route if I have to but I would like a better quality lock if possible. Any input is appreciated!!
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LH Investarm lock
- Thread starter mamero
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I beleive they do have LH locks but will it fit the morticed Investarm stock? Is the existing mortice same shape, is this pretty standardized. If not I guess I could make a lock plate and transtplant rest of the lock on to the newly make lock plate?
I know people that have used there RPL and they say it less work then you would think, just a little wood to take out, if any. The one you need is a #5 in the RPL chart. Give them a call and they will let you know if the left hand is a different number
Just got off the phone with Bill at L&R. He said they do not have a LH one in precussion but if I send them the one I have they are willing to make it. On a side note they have one LH in flint. Im pretty excited to see this unfold and will update. There has to a more Lefties with Investarm sidelocks that want an upgrade.
I have a left hand Flint RPL that I put in a lyman deerstalker stock and it was very easy to install. Lyman and investarms are the same I think. On a side note I put a rice .54 smooth bore barrel on it and shoot shot and ball out of it. Good all around gun. :thumbsup:
Good to hear, im not affraid of tinkering but I do preffer an easy swap. Did you keep the trigger? When I wrote to L&R I told them Id like to buy a new trigger group as well. Compared to TC Investarm trigger leaves a lot to be desired in that department.
RE Davis sells a replacement Lyman/Investarm trigger groupsfor ~$50.muamero said:
But like many others here did, I took a Lyman/Investarm (early model) trigger group and replaced the sear spring with a lighter one. What a WORLD of difference! Now I have on hand custom arms with dbl-set triggers and I cannot fathom where the Davis would be an improvement. IMHO; from what others have stated and from what I recently did/experienced, the stock lock was out of balance with the spring pressure and the lighter spring made it work significantly better.
And sure, while admittedly I didn't sleep at a Holiday Inn last night ... I do have formal training as a machinist and gunsmith and have full confidence in this simple upgrade to the OEM trigger.
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I believe investarms and lyman use the same lock.
A lyman lock isn't a bad lock at all.
Their triggers could use some help.
As with any lock, some basic tuning makes a big difference.
A lyman lock isn't a bad lock at all.
Their triggers could use some help.
As with any lock, some basic tuning makes a big difference.
Trigger Spring - On the Lyman/Investarms trigger assemblys, I found there is a small screw behind the rear trigger to adjust the tension on the trigger mainspring and mine was cranked all the way up. That made it pretty tough to set when pulling the rear trigger and it also gave the front trigger an abysmal letoff.muamero said:
The trigger assy didn’t need all that tension. When I backed it off, that screw was loose, so I secured it w/ loktite. But I didn’t get the full realization of how well this worked until I replaced the sear spring too.
Sear Spring - I was lucky and have an assortment of spring wire sizes on hand, so I’ll just say that the stock sear spring is easily 5X stroger than it needs to be! I replaced it with a much lighter one and as stated, it only needs to be strong enough to reliably allow the sear to set in the notches.
In combination, the results are so deamatic that I can’t imagine why I would need to buy a replacement Davis trigger assy.
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Plus 1 on sear springs. Clip off one coil at a time and try it, or replace it with a weaker spring.
Well beleive it or not my lock is finished and being sent today hopefully. Wholy turnaround time Batman. Spoke to Bill again and he voiced same opinion. Investarm triggers are fine just need adjusting. I will post photos when I receive the lock.
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Davis DeerSlayer triggers will drop into that InvestArm stock. They were made for TC Hawken( rpl triggers )but l currently have two GPR’s with them. Smooth as butter! Excellent investment for around $50.
Respectfully, Cowboy
Respectfully, Cowboy
The lock is here and It feels like a huge upgrade. So much crisper and quite obviously appreciably faster. Feels very strong though. It dropped in the Investarm stock with minimal inletting and it functioned flawlessly. Armed with the knowledge you guys shared with me and a short tutorial by Bill of L&R I have the stock trigger shooting reliably under a pound of pull as measured by RCBS pull scale.
There is a light gap in the front part of the lock plate. I would like this to go away/minimized if possible. I am tinkering with the idea of taking the lock plate to my smithy and heating and using my cross peen to stretch the lock plate to oversize so I can trim it for better finish. Before I go down that route wonder if you guys have any other suggestions.
There is a light gap in the front part of the lock plate. I would like this to go away/minimized if possible. I am tinkering with the idea of taking the lock plate to my smithy and heating and using my cross peen to stretch the lock plate to oversize so I can trim it for better finish. Before I go down that route wonder if you guys have any other suggestions.
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I’d leave well enough alone on that one! Looks good to me? Wood to metal is showing a very minuscule gap. Doesn’t subtract or effect the overall beauty of your muzzleloader. I’d put an outer finish on yer new lock and call her done ✅
Respectfully, Cowboy :thumbsup:
Respectfully, Cowboy :thumbsup:
Thank you for your detailed instruction, I just re read your response and realized that I did not make it clear that I am not replacing the existing lock with an L&R one. I am building a completely new rifle based on a brand new Investarm stock. It is amazing how wel thought out these mechanisms are and how adjustable they are. On the other hand also just as amazing how many muzzleloader owners are unaware of how adustable their trigger is and like myself just roll with whatever the factory has set it up to.
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