300WSM primer question

[northernexposure]

Gentlemen!
I have a quick question for you... I was loading for my 300 WSM in the fall for the local white tail season. had a good load worked up for the season, and figured I would run with it.
The load is as follows:
Federal brass fired once
Winchester WLRM primers
61 grns of H4350
OAL 2.885

My question to you is this, are Winchester primers temperature sensitive?

Reason I ask, I got lined up on one, pulled the trigger and pop!
Figured it was a "one time thing" and chambered another round. Same thing!

Now I'm ****ed and Bambi is running into the bush... gone.

So I chambered and fired another three with the same results.

When I worked up the load, it was around the +10c area... when hunting, on the day it was -20c. Is this my problem?

 

[Shortmagman]

I can't answer the question about temperature because I have never shot in -20c, but I have had some WLRM primer do the same thing that you had happen to you.

I purchased 1000 primer from a gun shop at a reduced price.The gun shop had bought them from a store that went out of business. I don't know how old the primer were but they must have been 15-20 years old. I have had a number of them fail to fire.

I have never had a fresh WLRM primer fail to fire, but again I have not shot them in very cold conditions.

 

[northernexposure]

I forgot to mention the projectile being used... 185 grn Berger VLD hunting.