So far mine hasn't shown a preferance for any particular ammunition.
Federal - 550 count Waly world bulk pak
Remington Thunderbolt
Federal American Eagle
CCI Mini Mag
CCI Stingers
All of the above have worked pretty much the same.
Tips from my experience:
- Take your time fitting the unit. I mean REALLY take your time. It pays off big time.
- Clean the firing pin channel. Mine must have had some packing grease in it, and I didn't clean it out before using the unit. A few hundred rounds later, I had all sort of FTF. Taking it apart at the range was a PITA without having my reading glasses to let me see what I was doing.
If you're the meticulous type that takes your time with things. and makes a habit of cleaning and inspecting a gun before use, then you shouldn't have any problems. Generally, I inspect a gun before the first use, but don't clean it unless there's an obvious safety and/or function issue.