Does it not like some steel-cased ammo? The first time I took it out, I shot Hornady steel-cased through it, no problems. The other day I took it out, along with an AK. I was shooting some Herter's through the AK, no problems. I switched to the Mini, and it would ignite about half the rounds. I first thought it was something wrong with the rifle since the last time I shot it, then remembered that I had used the different ammo before. If it's just that it doesn't like the Herter's, I won't shoot it, but I was just wondering.