hello All,

I have a no.2 mkiv trainer that shoots standard velocity ammo fine. If I use high
velocity, especially Winchester, the cases will bulge and blow out where the extractor
is gripping the fired case.

Now the chamber appears to be relieved at the entrance for easier loading. The barrel is a 1934 BSA on a 1915 BSA receiver, and bears Canadianicon property marks. I would assume that standard velocity would be the proper ammo for it. Has anyone else run into
this problem?
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