I realize some 22-250's will shoot the 52 grain faster, mine won't, only the 40's like to run fast in this barrel. Both shown loads are about 3 grains from max, so I was thinking it was a responsible comparison. I'm with you on the fast twist 22-250, it would be great. A 90 grainer at say 3200-3300fps with a bc the same as a 175 SMK.