20-something years ago I got a pierced small pistol primer with a 22 Hornet load. I was only using them after reading about how you don't really need a powerful primer to ignite the small volume of powder in a Hornet case. Along with how the powder ignition may be more uniform with the pistol primer. Had shot quite a few with those primers and that one round was the only problem. Wasn't a hot load and I never noticed much difference when using them, so I went back to regular small rifle primers.
