Posted by JF in CT on April 16, 2013 at 15:14:59 from (70.194.3.77):
Some time back I asked opinions on 22 LR groupings as rifles with telescopes were new to me. Well it has been quite some time since I was finally able to get back to the range. I got a lot of advice and figured I’d take just about all of it. I also did a bit of reading on the subject (should have done that first) and picked up a tip or two. Here are the results so far; I fully floated the barrel not as much for harmonics but I found the end of the stock was pressing on it in such a way that, depending on how tight the action hold down screw was, the point of aim was changing considerably. I also cut down the chamber end of the barrel so the chamber length, while not quite Match is closer to Bentz. At least the rifling engraves the first ring of most bullets. Someone mentioned keeping the flat of my finger on the trigger and sure enough I found I was unconsciously putting my first knuckle on it. I got a sand bag to rest the back of the stock on which helped remove lots of my movement. I also made up some different targets with a cross that helped match the scope cross hairs to aid in zeroing. I think this made a big difference. Someone mentioned that they didn’t think anyone could get a good group using Federal (I think they were) hollow points. I took a close look at the bullets and it seemed to me that the holes in the tips were not all that consistent. I figured that might make some “corkscrew” (for lack of a better term). I got some Blazer HV round nose and some CCI standard velocity. The Blazers grouped noticeably tighter. I read that some say the high velocity get upset as they go transonic and sure enough the standard velocity produced consistently tighter groups yet. Times being what they are I think it will be a long time before I can come up with any match ammo let alone any 22s. I read that some experts say not to clean the barrel for tighter groups. This was difficult for me to do as I never put anything away without a good cleaning. Darned if this didn’t work. After about 50 rounds things got and seemed to stay consistent. The picture is of a 5 shot group at 50 yds (there wasn’t a 75 yd position at this particular range) on a gusty day. I spent a lot of time waiting for the target holder to stop rocking in the wind. While not a world record like some posters seem to have achieved it is getting better and I think I can get even tighter with less wind and better ammo. Thanks for the suggestions.
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