Ran some .22's

[Randy Bohannon]

I just read through all of the replies to this thread. I have been playing with CZ 452 Super Exclusive,453 American,455 Trainer ,455 Full Stock .22WMR all have iron sights except the 453 American it has a Leupold 4-16 Rimfire scope and set trigger and is the easiest to see what ammo does what with the tight bores on CZ's rimfire rifles.
Looking through a couple of U.K. rimfire forums it had been mentioned by several shooters answering new to the game questions concerning the 'best' and 'cheapest' accuracy improvement. It turns out that weight sorting their rimfire ammo was the single best thing a person could do to any rifle and improve it's accuracy. I spent Christmas in CA with my Son and we both have nice rimfire rifles to play with so we weight sorted Eley Club, Norma 'Tac 22' and the Federal 'Auto Match'. Wow were we surprised in the extreme variances in the Eley Club ammo equally split greater than 52 grs. and less than 52 grs. Heaviest was 52.8 grs. lightest was 48.3 grs. My Son asked the question is that powder or bullet variances ? Who knows unless you pull them apart and weigh each component,most likely a combination of all. So we seperated 500 rnds of each. The Norma was so consistently boring @ 52 grs. +- .4 grs.all greater than 52 grs. we did'nt weight sort but 250 rounds.
The Federal Auto Match was right between the two @ 51.8grs. and 52.5 grs. all these are 40 gr LRN. All were seperated by either heavier than 52grs or lighter. The Eley Club over 52 grs. shot the best in three different rifles and turned in some of their best groups to date. The lighter stuff shot decent with a marked difference and all rifles prefering the heavier bullets. Norma Tac22 shot well in all rifles with nothing exceptional. Auto Match shot as well as it always has in my CZ's I did not notice any improvement in accuracy.
Bores of all rifles were throughly cleaned between ammo shifts.So now to do the same with the Wolf and some the other .22LR available and shoot for groups at distance greater than 100 yds.
So my Son's and my conclusions are, it is wortwhile to weight sort rimfire ammo of unknown variances and not mess with Norma Tac 22 or any other ammo that demonstared no significant improvement some ammo will when weight sorted will give you the best groups you and the rifle are capable of.I see weight sorting as another variance I can control to certain degree and reduces those nuisance 'flyer's that ruin a super group.