Light primer strikes

toddlouis

Well-Known Member
Joined
Aug 29, 2019
Messages
77
Location
alaska
Hey all,

I have a Winchester model 70 300 wsm. It’s probably the most frustrating rifle I’ve ever owned. Lol.

It shoots amazingly well some days, other days not so much and about every 7-8 shots I’ve been getting very light primer strikes, it was doing this with the old firing pin spring and installed a new one from Midwest Gunworks and still happening.

Is there anything I could try/do before I decide to spend the money on a gunsmith?

Hunting season in Alaska is coming up soon. Lol. Any advice, help, tips is greatly appreciated.
 

djfergus

Well-Known Member
Joined
Dec 25, 2015
Messages
1,560
You can measure firing pin drop and see if it is at least .230" supposedly .250" is optimal. Measure from the cocking indicator on the back of the bolt from being cocked and then in fired position. Also, do you think it's possible that you have excessive head space and the cartridge is allowed to drive far enough forward into the chamber that the firing pin isn't driving into the primer far enough every time.
 

toddlouis

Well-Known Member
Joined
Aug 29, 2019
Messages
77
Location
alaska
You can measure firing pin drop and see if it is at least .230" supposedly .250" is optimal. Measure from the cocking indicator on the back of the bolt from being cocked and then in fired position. Also, do you think it's possible that you have excessive head space and the cartridge is allowed to drive far enough forward into the chamber that the firing pin isn't driving into the primer far enough every time.
Measure the drop and it’s .224”.
 

djfergus

Well-Known Member
Joined
Dec 25, 2015
Messages
1,560
What is the firing pin protrusion? Also, I have noticed on Win 70s that the spring seems to drag inside. I ended up buying a decimal sized reamer to enlarge the inside of the bolt so the spring doesn't drag. Depends upon the vintage of the rifle as to whether spring drags, or not.
That's a good point. Might not be enough potrusion. And it could be a cumulation of not enough potrusion with excessive head space on some of the brass.
 

Trending threads

Recent Posts

Nightforce has great tracking capabilities, they are rugged, a bunch of elevation, holds zero forever, and reticles are designed for long range shooting. So if you are looking to shoot long distances constantly, then you need a scope that can take the abuse. -- gilmillan1


Culture Of Excellence At Nightforce Optics
By Len Backus

A high level of quality both in production and in service. Read More


Nightforce is such a solid combo of reticle, available elevation, glass that is good enough to shoot at the longest range you can dial. Nightforce has bullet proof construction that can handle the incidental horse rolling or some other rodeo action. -- bigngreen


Nightforce ATACR Scope Review
By Jeff Brozovich

The new NightForce ATACR is for sure a top choice for any long range shooter. Read More


The total package. Nightforce is the best I have used as far as turret feel and solid detents. I have never had one that didn't track right on and always return to zero. Nightforce NXS is the best value for everything I need. -- Broz


Nightforce Velocity 1000 Reticle Review
By Scott Shreve

I think Nightforce knocked it outta the park with this reticle! Read More

NightForce


Top