Rain. Rain. More rain. Had intended to sight in and do some serious MOA shooting with the new CZ-452 this weekend. Weather didn't cooperate. My first frustration was a magazine feed problem. I had difficulty using the internet to access the CZ thread on RimFireCentral to figure out exactly what the problem fix was. My HughesNet sat link was mostly on the fritz due to the rain. Went out to inspect the receiver and it was, literally, waterlogged. So I could only download very slowly and could not upload files. I eventually fixed the magazine - did some adjustment bends on the magazine follower and got the rounds feeding smoothly without dinging the tip. This morning, I got a friend with a pick up truck to help me haul the bench I had made down the mountain to the range area we use, only to find out that what was represented as 100 yards (stepped off) was in fact 85 yards when measured by laser. So I couldn't shoot 100 yard targets (until I get busy with the chain saw, blade trimmer and bush hog to gain another 15 yards of useable range. And after all of that, I ended up shooting in an intermittent, light drizzle. Despite the rain, I did manage to get several sub-1-inch groups. Can't qualify as official "MOA" shooting because of the 85 yard range, but I do feel like I am making progress. The trigger has been lightened to 1.3# pull and I have determined that the rifle shoots CCI 20 grain 17HMR better than the 17 grain CCI or either the 17 gr or 20 gr Federal rounds. I didn't get to try the Winchester 17 or 20 grain rounds yet. My best group in suboptimal conditions was 0.86 in, CTC at 85 yards with CCI 20 grain. The 17 grain ballistic tips may do a bit better in dry conditions with no wind. Maybe next weekend I will get another chance to try for 100 yard MOA groups.