I just got on of these Prairie Dogs in 22-250. sing some 25 YO loads with bulk .224 55gr FMJBT and IMR 4064 I got a 10 shot .67 group after a 20 round break in. Am now going to try some Hornaday 50gr with H 380 and 4064. I have some 69 gr fmjbt match Sierras going to try as well.