Help determining muzzle velocity

[jcann]

I'm shooting a GAP 7wsm with a 26" 1 to 8.7 twist 5R Bartlein barrel. Load data is: 180 gr Berger hunting VLD, 65.5gr H1000 powder, Winchester brass and CCI BR 2 primers.

I don't own a chronograph nor do I have access to one and I was wondering if someone would mind running the numbers and give me an approximate muzzle velocity?

I don't know if you would need this but altitude would be 1249', temperature 85 degrees, barometric pressure 29.9, powder temp 85 degrees.

Thanks in advance for your help

 

[dragman]

Best tool that I could tell you is go to the range and zero the gun perfect @100 then shoot it @ 300 for group then measure the drop from center too center. then you can go to any decent ballistics program and punch all bullet B.C and weight in and then adjust the FPS until you get the same drop. that should put you within 25fps or so.