Help with Trigger Adjustment

South Pender

South Pender

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I've recently acquired an older-model Schultz & Larsen M65DL rifle (a .264 Win. Mag.) and have been adjusting the trigger weight-of-pull. When I got the rifle, the trigger was set at about 4.75 lbs.--way heavier than I like it. I found the weight-of-pull screw and began backing it off. The picture is below. It is the screw with some rust on it. When I acquired the rifle, that screw was all the way into the housing, but you can see how far out it is now. At its present backed-out position, the weight-of-pull is about 2 lbs. 10 oz., a weight I like in my hunting rifles. However, in its present position, the screw turns loosely without any friction, and my concern is that the screw will continue to turn on its own when the rifle is being fired. In fact, as I've been testing weight-of-pull on my Lyman digital trigger gauge, I can see that it has turned some on its own.

So here's the question: what's the best way to lock this screw in its present position so that it won't turn any more on its own. I thought of using blue loctite (medium strength) on the threads, but am not sure I want to back the screw out any more (I'm concerned it might come right out of the housing) or to apply loctite, and am not sure that this is the right fix. I don't want to glue in it so tight that it couldn't be adjusted in the future. Would it work to just put a little blue loctite on the outside of the screw where it is now (without getting any on the threads inside the housing) and up against the housing, or would that not be sufficient. Should I use something other than blue loctite.

Any suggestions would be greatly appreciated.

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There is loctite 222 or 222ms it's a purple colour. It's a very low strength loctite used mainly on fine threads for anti vibration like sight screws it has a break strength of around 25 inch pounds. The loctite should wick through the threads or you could try the old nail polish trick put a dab of nail polish on the thread to keep it there.
 
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I would take the screw right out, clean the threads, apply a bit of blue Loctite and screw it back in enough to contact the spring and compress it slightly. Then let it sit a few hours... The screw needs to be engaged enough to make sure the trigger is pushed back fully. You might want to replace the spring with a lighter one where the screw would be in farther with the same resultant lightness.
 
kamlooky said:
Don't forgit the bump test when you have it all back together.
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Yes, absolutely. Good advice.

WobblyHead said:
There is loctite 222 or 222ms it's a purple colour. It's a very low strength loctite used mainly on fine threads for anti vibration like sight screws it has a break strength of around 25 inch pounds. The loctite should wick through the threads or you could try the old nail polish trick put a dab of nail polish on the thread to keep it there.
Click to expand...
I have a tube of Permatex low strength threadlocker, purple. I'm guessing that it is the same thing as the Loctite branded 222. Anybody know if this is the case? In any case, I think I'd prefer using it instead of the stronger blue Loctite.
 
A drop of Blue Loctite isn't strong...

If you are worried about a thread locker simply set the screw where you want and paint it over with a blob of nail polish making sure it contacts the housing and let it dry. Easy to 'break' that loose.
 
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Thanks to all for the suggestions. I took the screw out, cleaned it and put it back in with a little Loctite 222 on the threads. Seems to be fixed in place now.
 
guntech said:
A drop of Blue Loctite isn't strong...

If you are worried about a thread locker simply set the screw where you want and paint it over with a blob of nail polish making sure it contacts the housing and let it dry. Easy to 'break' that loose.
Click to expand...

I too was going to suggest that as well, but was thinking purple nail polish , lol.
The bump test and before all of that clean the threads with some electronic cleaner or even some CLR .
But, all the more knowledgeable folks spoke first.
Sounds like it is going to be a very nice gun .
Rob
 
Send YoDave a pm.
He is the spring chap.
I'll bet iff'in you answer some spring size questions, he could find sumting
in his collection of springs that would work well for this ker-pow.

On another note, they are junk rifles.
Send'err'ear and I'll dispose this newscence rifle for you.

Heck, I'll even let you pay the freight to avoid any guilt awn yer part..............:wave:

Nice frick'in score.
 
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