main spring

[binski]

I have a M14 and a 686,that I want to use for DP matches.Both of them have 2 1/2 to 2 3/4 SA trigger pull.But the DA of both are over 11 1/2# as near as I can tell.I have a M19 that has a 9 lb DA that breaks great.It has a 4" barrel and it isn't near as accurate.I've used the search function and I gather that if I change the stock main spring with a reduced power spring I will have a problem with light primer strikes.Unless I use Federal primers.And naturally all I have or can get are WW primers.I just had a thought,I could take the spring out of the M19 and try it in the M14.What do you think. binski

 

[BlueOvalBandit]

Has the 19 ever been worked on? Getting lighter trigger pulls generally takes polishing and balancing spring weights between the mainspring and the rebound spring. If you're careful you can bend your mainspring by putting more "arch" in it. This will lighten the trigger pull, but be careful not to go to far. Around 8.5lbs is what I've found most factory ammo likes, lower and you may get light strikes.

 

[BobR1]

Using Federal Primers you should have no problems with a Wolff Reduced Power Ribbed Main Spring.
I normally do not have any problems with a 13 pound Rebound Spring. I have a 12 in one of my revolvers that also works fine.
Springs are cheap, and you can always change them again.

Option Number 2: Install either a 12 or 13 pound Rebound Spring.
Install a Wolff Ribbed Full Power or Reduced Power main spring. Tighten the strain screw all the way down. Then start backing the strain screw off 1/4 turn at a time, and test fire until you start having lite strikes. Put Blue Loc Tite on the Strain Screw and again tighten it up. Then back it off to 1/2 turn from where you started having miss fires. You should have a pretty good trigger at this point.

A little polishing of the internals should not hurt either. Watch a few You Tube vidios on trigger jobs first.

Bob