TommiT wrote:just curious, how high would the pressures be with 41 or 42 grains of h110 staying with the 2.3 col and the 275 tsx bullet? Would like to get to 2,200 fps, but have heard bad things about lil gun regarding temp sensitivity etc. Never used it in my 458 socom or handuns. Pretty much stayed with unique, 2400, and h110. Just an old fart I guess
Lil Gun isn't a concern in this straight wall caliber as long as you don't work up loads when its 50 degrees out and then shoot it when ts 100 degrees without adjusting the charge down but that's the case for most, if not all ball powders'
41gr of H110 bumps the chamber pressure up to 45.6k and 42 gr up to 49k
in theory".
If you want to go higher, take Bmt85's advice and seat the bullet a little longer. That'll buy you back about 3k pressure reduction. Can't believe you're not applying any crimp. I assume you dial the seating die up a little (per instructions) so as not to apply a roll crimp. Basically run the ram up, screw the seating die until it bottoms out against the shell holder and back the die off a turn before locking it down. Then apply a taper crimp down into the driving band groove. The importance of a strong crimp goes down as the bullet weight goes up. It is however, critical with lighter bullets which get moving a lot easier.
Hoot