[ManyFeathers]

When you say a 400yd set-up.......this confuses me

Are you talking "man-sized" targets?

If you want an M1A buy it!

If you want a bolt...buy it!

Don't buy an M1A looking for bolt action accuracy and don't buy a bolt looking for firepower!

Realize you don't often get it both ways, you almost always sacrifice accuracy to get reliability or vice versa

IIRC the original 1903 Springfield and the 30-06 cartridge was designed for a maximum range of 2200 yds with irons.

Now I read that somewhere, before the days of computer, so I know of no link

I would tell you, a standard M1A with irons would be capable of "man-sized" accuracy at 400yds

Now if you want to put a projectile between the eyes at that range, look for a bolt