I have a 220 SS elite that engages slide lock on last round about half the time. Gun only has around 300 hounds ran through it, have 4 mags, and have used several brands of ammo. I have ruled out mags and maybe ammo. I recall reading that European ammo is hotter than domestic ammo and am wandering if the gun may be designed as such? Anyway, feel free to offer any suggestions.
Thanks!!!