Thought this was a fairly well known issue with the Tikka T3s and Sako A7s. The plastic isn't strong enough and so the top of the mag expands from the spring pressure with cartridges loaded in it.
I've had Tikkas for over 20 years and never heard of this phenomenon. I think you're jinxed.
I’ve only had Tikkas for 10 years so I lack JG’s duration, but I have a lot of Tikkas and I’ve never had this problem.
Makes me wonder how you’re loading the mags. Try not pushing the cartridges straight down on your next mag.
P
