Took my new Glock 30 to the range and had a failure to feed on the second round with Lawman 230 grain hardball. After that, the gun ran like a Timex watch. However, I am all over the pie plate at 30 feet. When I am taking slow, controlled, hand held shots (isosceles stance) at 30 feet, what size group should I expect from a G30??? 3 inches? 4 inches? 6 inches? Barn door? I can shoot 2 inch groups with my Colt. To be fair to the Glock I need to know what size group to be satisfied with... I have read posts where some shooters consider the G30 to be the most accurate Glock. Thanks.