ALSO...im curious to know what other 22-250 users are loading & what velocities you are getting...?
The charges listed are the highest tested, & so far no signs of pressure that i can tell...
All at 100m.
The brass was all formed & neck sized prior to these shots, & all rounds were seated at .010" off the lands
Ive only chrono'd the zmax loads & not happy with the velocities--the 36gr load with 50gr Zmax is only reading 3490-3500fps, which probably means the 55gr SIE GK with 35.5gr/2208 is probably only doing hot 223 velocities...im not sure what to expect as a norm, but i intend to check that against a different chrono to see if my magneto is a bit crook.
(This is the rifle i was getting some double grouping with--i pulled it out of the stock & replaced it with an extra 5in/lbs on the front screw & it appears to have fixed the problem--touch wood...! not one double group out of nearly 40 rounds

Anyway, any thoughts on where you would further proceed appreciated...
Thanks.

First load...
Hdy 50g Zmax/2208
Second load...
SIE 55GK/2208
Cheers