The only thing I can think right now is that not all chronographs are created equal? I've blown a few primers clean out of the back of 22-250 brass and left the primer pocket big enough that I could insert my pinky finger in them and have never before witnessed any speeds near what some claim...
I run 53 gr vmaxs at 3850 with a stiff charge of cfe 223 in my 12 twist 22-250. It does great on dogs out to 700 yards. At 500 yards it's only drifting 18 inches in a 10mph wind and drops 24" from a 100 yard zero. The 0.29 BC makes this bullet a great choice IMO. Pelt damage is minimal as they...
I have a similar rifle that I built on an old lefty Remmy 700 30-06 action I had. 27.5" Pac Nor 9 twist fluted sitting in a pillar bedded Mcmillan BDL style stock. I run 53 gr of RL-22 under 140 Bergers @ 3126 fps and it's a hammer out to 1350. I run a NF 5.5-22x56 NP2-DD on it but I have to...