Bigwheels Gunny Sergeant Full Member Minuteman Jun 16, 2007 1,819 298 58 Anacortes WA Mar 21, 2009 #1 Mar 21, 2009 #1 I've been cronying some loads in my 300 WM, & with H-RETUMBO, I'm seeing an increase in velocity when it gets colder. Now anyone know how I can get my FFS software to accept a negative for powder temp. ie. -2fps/*F?
I've been cronying some loads in my 300 WM, & with H-RETUMBO, I'm seeing an increase in velocity when it gets colder. Now anyone know how I can get my FFS software to accept a negative for powder temp. ie. -2fps/*F?