I've been using the Wilson buffers for a long time in my Springfield Armory .45 M1911 and I haven't had and malfunctions that weren't happening before. It has always had the problem of occasionally hitting me in the forehead with an ejected case but it's always done that.
Tony
I have a thread where I had them in a full-size Wilson. With certain ammunition the Shok Buffs would occasionally cause failures to feed (PMC Bronze IIRC). My impression was the recoil spring wasn’t compressing as it would otherwise. Removing the Shok Buffs eliminated the issue. With Federal ammunition I had no such issues, but over the past year I didn’t always get to be choosy with ammunition. The only other issue I have had with Shok Buffs in both my Wilson and the Springfield Armory Range Officer I had was I couldn’t release the slide with the slide release with the Shok Buffs installed.
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