I am working on a mk262 clone for my shtf ammo. I have worked up to 23.2 grains of some military pulldown imr 8208(not xbr) in lake city brass with cci 450 primers. 77 grain Nosler CC pills. Getting 2700fps out of a 1/8 twist 16" tube. What are you guys getting? Should I try for faster? Primers not flat, small ejector swipes.