I've recently resumed shooting after a few years and I've actually been doing pretty well. I've shot paper and even some combat courses. I can shoot competetively but with my sig 220 I have to aim at the top of the target. I shot 30 slow, well controlled rounds off hand and had a large open hole about 3 - 4 inches below the target at 25 yds. I shot a friends Kimber (better trigger) and put all in the target - 3 or 4 inches at 25 yds. I shot a combat course and did quite well but had to aim at the top of the targets. I've shot my sig in the past (years ago) and didn't have this problem. I've considered (but not attempted to change) grip, trigger, recoil springs, lighter/stronger handloads, etc. I cannot figure out the problem. Can someone give me a list of possibilities and how would you address them. I've got a 10 hour tactical class in 1 week.