Re: .243 improved help ?
I just built one, (.243AI) it's one of my most accurate rifles to date.. 8 twist Shilen, 117gr Matrix on top of 47.5gr H1000, Velocity?? but crazy accurate.
I'm not sure you could get 47.5gr of H1000 into a .243 win case?
I cannot see for the life of me why people seem to feel the need for 7 twists unless running at lethargic velocities. My 2bits.. good cartridge