Guys:

I went out in warmer weather to check the difference w R17, accubounds, from winter shooting as discussed earlier in the thread
my bone stock CZ550 shot a 0.45" group, 2 thru the same hole 0.16" apart, and the flyer that opened it up to 0.45". There was a 7-10mph variable cross wind.
I wish I knew how to upload pic's

I tried Varget earlier in the year and didn't get the velocity I am looking for, nor did it tighten up the group LOL

yesterday I fired a fouling shot, three for accuracy, then a couple at the 400y target, and went home