Got up to 17.0 H110 yesterday with the 158 xtp. 5 inch 627. Velocity averaged 1209 fps (seems low) ES and SD were dick nothing. Went to 17.5 and velocities jumped up to nearly 1300, but ES and SD was all over the place. Cases fell out of the cylinder, no flat primers.
Might give AA # 9 a try.
