Firstly the sticks have more reports of problematic ignition compared to the loose APP 3F powder which is potent and reliable.
Secondly the primer should be fresh and the gun needs to be properly stored and sealed at both ends to keep moisture out between cold weather hunts and until it's discharged.
That includes protecting the bore from condensation.
The cold temperature shouldn't negatively affect anything if all is properly stored and sealed.
If there was a partial flash hole blockage then that's not a cold weather issue per se, but could have contributed to the problematic ignition due to the reasons above.
Last edited by arcticap; 05-01-2011 at 11:08 AM.