nope never done any benchrest.but even centerfire ammo is crap compared to home loads it took ages for my 204 to shoot .25 and under, and the best it would do with factory was 1" at 100.i find one box of hmr ammo differs greatly from another.i shoot an anschutz and winchesters are shockingly bad ,hornadys are best in mine but i know rested i can shoot under .25 all day .through my swarovski 30x mag scope even the best rimfire ammo i can find does not all land were i shoot and that would wind me up if i had gone to a lot of trouble only to be let down by a bad batch.

atb mike