Divey
Member
gun) Try fast twist with 40 gr V-Max or 52 A-Max bullets. I have used my 1-9 twist in 22-243 A.I. with 40's up to 4800 fps and they rip the heck out of a PD. I would go 1-10 with short throat and have some fun.
Years ago SSS Fred Moore told me at that time he didn't think you could over rotate a bullet. Well you can these new bullets, the 40 V-Max. Because now my same rifle with the 1-9 will spin bullets at 4800 and they don't stay together anymore. Also the 30 V-Max always blew up at 5200 fps......Now I can on spin them around 4400 fps otherwise they split into 2 impact points or just leave a silver grey cloud.
I cranked up the 36 gr Barnes Varmint Grenades in the 220 Wilson Arrow to a tad over 4700 fps using ADI's AR2206H powder (I think the USA equivalent is Hodgdon H4895) and they held together and still shot a tidy group. That is with a 1 -14 twist though.