Quote Originally Posted by wbm View Post
Wow! 2525fps and 2675fps is really poking along with 55gr of H4350. Hodgdon lists 3100fps with a 130gr bullet and 55.5gr of H4350 from a 24" barrel.

You might want to go to here http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi and plug in your data.

Set the scope at say 2" high and 100 then go to 300 and see what the drop is. Not quite as good as a Chrony but closer perhaps to real velocity and performance relative to your H4350 load in your rifle.
Apologies, correction, my powder is H4831, not 4350. I went from memory and should have checked my written load data.

2525 was with 52gr, 2675 was with 55gr.

I agree, the exercise has me doubting the accuracy of my device. I really need another one to line up in series and compare against. They Lyman book called for velocities about 200fps higher (although out of a 4" longer test barrel). The Lyman book indicates 2990fps with a max compressed load of 58gr of H4831