P220 mag problem

opusxx

Moderator
I am having a problem with my new P220 45's mags that were provided with the gun.
they fail to feed the last round into the chamber when i shoot Corbon 185 gr+p and triton 165 gr +P. the body just below the front of the follower here the mag tapers seems to be too narrow to feed these wide mouth HP's.
these are the SS mags that have the plastic followers. My blue 220 mag w/ the metal follower works fine.
I called sig and they said they do not recomend CorBon ammo. ??????
but no cause as to why the mags wont work w/ the other widemouth HP's.
any help from you guys would be appreciated.
 
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