I decided to replace the mainsprings on my 2 k-frames recently:
http://i.imgur.com/8pRFp9m.jpg?1
I bought one of the reduced power springs, and a couple of the standard, just to see what the difference was.
I dropped the reduced power spring in the M&P, and it was REALLY weak, like it was barely engaged with the strain screw turned all the way in. Nice light DA pull, but I doubt it had enough juice to reliably set off even soft primers.
I had put the full power spring in the 15-3, and it was WAY too stiff! Like, way more stiff than the stock spring, and this gun hasn't had many rounds through it, as far as I can tell.
So I swapped them. Interestingly, the full power spring in the M&P is great, much smoother pull, and seems to match the REDUCED spring in the 15-3. Both now have much improved triggers, the SA pull on the 15 is especially nice.
Was there some change to the geometry of the action between the two? Both are "short" actions, to my knowledge.
I've got one problem left with the 15, though. Right at the end of the DA trigger pull, after the cylinder has locked up, there's a bit of a gritty feel, but only when using my right hand. And gritty may be too strong a word, it feels like something's rubbing. If I make a conscious effort to push the trigger over to the left, it goes away. Any idea on what the culprit is, or do I just need to continue to dry fire and let the parts mate a little more? This one didn't have a turn ring on the cylinder when I bought it, as I said, I don't think the previous owner put much more than a box of ammo through it.
http://i.imgur.com/8pRFp9m.jpg?1
I bought one of the reduced power springs, and a couple of the standard, just to see what the difference was.
I dropped the reduced power spring in the M&P, and it was REALLY weak, like it was barely engaged with the strain screw turned all the way in. Nice light DA pull, but I doubt it had enough juice to reliably set off even soft primers.
I had put the full power spring in the 15-3, and it was WAY too stiff! Like, way more stiff than the stock spring, and this gun hasn't had many rounds through it, as far as I can tell.
So I swapped them. Interestingly, the full power spring in the M&P is great, much smoother pull, and seems to match the REDUCED spring in the 15-3. Both now have much improved triggers, the SA pull on the 15 is especially nice.
Was there some change to the geometry of the action between the two? Both are "short" actions, to my knowledge.
I've got one problem left with the 15, though. Right at the end of the DA trigger pull, after the cylinder has locked up, there's a bit of a gritty feel, but only when using my right hand. And gritty may be too strong a word, it feels like something's rubbing. If I make a conscious effort to push the trigger over to the left, it goes away. Any idea on what the culprit is, or do I just need to continue to dry fire and let the parts mate a little more? This one didn't have a turn ring on the cylinder when I bought it, as I said, I don't think the previous owner put much more than a box of ammo through it.
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