Ammo in cold weather

[Limitless]

Regarding the issue with the shells not firing...

If 2 of the 4 failed in another gun, is the thought that 2 guns had light primer strike issues? Or simply the primers are harder than most, and a number of guns might have issues?

 

[SPUR60]

15 isnt cold enough to severely alter ammo performance in modern factory ammo. Once you get to -15 then you start having primer failures. All loads will be slow at cold temps, but you wont get a FTF at those temps.

Im guessing its a firing pin clearance issue due to metal shrinkage (or weak spring), and just was not smacking those hard Winchester primers good enough.

Very well could be the firing pin itself, but I had zero issues with the same primers in the 2 3/4" box of super pheasant, and zero issues with the 20 or so other random loads I shot to verify operation; and 2 of the 4 rounds I tried to re-fire in a different gun did not go boom. That's why I'm leaning towards the ammo. But I'll fire off a Numrich order and replace the pin and spring to be safe.

 

[Tomahawker]

Sounds like ammo is the culprit and an easy fix.