but when I shoot it with my gemtech tundra 9mm POI is extreme. 12-15 inches at 30 yards.
No and no.Possible Muzzle or damage to the crown. Threads may be off causing the bullet to strike something inside the suppressor tube. JMO
Acceptable group size, and consistent size, both suppressed & unsuppressed?it was shooting low and right.
And how many types of ammo?POI shift is only with suppresor.