Mosin Nagant Firing Pin Spring Question

M

Mosin-Marauder

New member
I was going to order a lighter tension firing pin spring along with a trigger pull improvement spring from https://www.crsurplusspring.com. I planned on ordering the light tension spring (21 lb.) Because my original spring over tensions and makes the bolt hard to open after firing. I read somewhere that the heavier 28 lb spring increases accuracy due to greater tension and a harder strike on the primer and an overall tighter lockup. If that's the case, then wouldn't that mean the lighter spring makes the rifle less accurate? I emailed the owner about this and he hasn't responded yet and I would just like to hear some advice before/if I buy. Thanks for your help in advance.
 
I would say get the trigger pull improvement (what pull weight?). As an overly heavy trigger pull definitely affects accuracy.

As for the firing pin upgrades, I don't know a whole lot about MN's, but I think you should probably wait. Please don't take this the wrong way, I mean no offense, but just going off of the groups you've posted pics of and your current skill level (although you appear to be improving by leaps and bounds), I don't think you would see 1 iota of improvement in your groups by decreasing lock time.

I would just keep up what you are doing-it's working. And continue doing lots and lots of dry fire practice.....now if the firing pin gets damaged or the spring breaks from all the dry firing (pretty unlikely) then by all means, order the upgrade.
 
What does decreasing lock time mean? I just want it so I don't have to whack the bolt a lot.

And thanks for your advice and compliments. I am continuing to work and I plan to pick up a new rifle sometime in the near future. I've really been working hard to save up for a mini-14.
 
I would think that it would make the trigger slightly lighter but any inherent accuracy would remain the same. what you need to look out for is a loss of reliability. the lighter string may not ignite the harder military primers.
 
By increasing the firing pin spring pressure (or lightening the firing pin) you are decreasing the time it takes for the pin to strike the primer once you pull the trigger (lock time). A shorter lock time (from when you pull the trigger until it strikes) decreases the time that any movement on your part, after pulling the trigger, will adversely affect accuracy. Basically, it gives you a little less time to have to keep yourself still, and in your hold.

The old BP long rifles lock time is something silly, like a second, (click the trigger, watch the flint drop and flash, the powder starts to burn, etc) it's amazing they hit anything. Modern rifles are in the milliseconds.
 
I just got the email back from the guy. He said that if my spring was heavy and had a lot of tension I would definitely see some improvement with a lighter spring, he also said that it would not affect head space and that they tested them with all kinds of surplus ammo with no problems. I plan on ordering the whole kit with both sprints and four front sight post extensions. For $14 I thought it was a good deal.
 
Mo,
If you're having a hard time getting your bolt open after firing, I wouldn't expect a new spring to help out much there.
Just FYI, let us know.
Denis
 
It's not so much after firing, it's dry firing too. The safety is a huge pain to operate too. If I cook it after firing and then cycle the bolt it's a lot easier to operate, though, just a bit of an inconvenience. I heard of people lopping of a coil on their original springs to make the tension lighter and they said that worked, but that doesn't sit too well with me (I think you know why :)).
 
Did you ever break the bolt down & remove all cosmoline from it & chamber?

The safety's never going to be exactly easy & cosmoline's the usual culprit in a sticky bolt.
Denis
 
You must log in or register to reply here.
Back
Top