RimX Proof 26" steel barreled action - bullet data

Rimfire barrels can be extremely picky about what they like and dislike. for 100 and beyond my favorite is Lapua Super Long Range. You can also try SK Long Range. Many are in the Eley camp and they make great ammunition as well, their Ultra Long Range though has been a bust for me and many others. Their Match and 1oX is excellent.
 
Rimfire barrels can be extremely picky about what they like and dislike. for 100 and beyond my favorite is Lapua Super Long Range. You can also try SK Long Range. Many are in the Eley camp and they make great ammunition as well, their Ultra Long Range though has been a bust for me and many others. Their Match and 1oX is excellent.
I've head they can be extremely picky, so will have to try a couple of different types. Any comments on Lapua Centre-X?
 
I have accurate lots of sk rifle match, eley team and eley match for my RimX / 26" Ace / Eachus chamber / Mike Manzella gunsmith. Of the three, eley match is best all around for me from 50-300y. Below is an eley match group I shot for a 22LR "long range" qualification (club requires certification to shoot beyond 200yds with 22LR (2" dot for ref)). 12.1 mils @ 300. Can't stress lot testing enough.
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