Thanks Conor, Rob and Azuaro.
I usually use those card targets with 5x targets on and the black inner area is @ 20mm.
I'll try get some groups done on those at 55 yards rested and see what groups I get with Prems and Barracudas.
I'll have a before and after 'before' to go on if the groups aren't acceptable.
Last edited by skires; 21st January 2016 at 08:12 PM.