Did you get one?
I bought an M1A in 6.5 to run beyond 1,000. I'm new to the M1 distance/optics game, having shot irons as a kid and bolts as I got older.
What I've experienced defies my redneck logic. With decent ammo, it runs 1.25 - 2.5 MOA on paper at 200, but it still slams that steel consistently out to 800. Groups between 6'-8' aren't uncommon. With specific, excellent ammo, it's solid out to 1,000, and a bit further if the wind plays nice. There are instances however, particularly as the barrel warms, where the bullets essentially dance around the target, reducing utility to that of an area platform.
It's a fun gun to shoot, if you don't mind attention at the range. IMOP, for the pennies my opinion might be worth, it's a fantastic coyote gun. It would also make a good spotter rifle, particularly if you have someone on a bolt that's capable of shots beyond 1,500.