I actually looked into the idea for a base to build a 1000yd light gun on. Trouble is, primers were not available at that time for a person who wants to reload. Next, the gun that I was going to cut up would cost as much as a BAT Action and unfortunately, that was the only piece that I would use. So, I bought a BAT.
Still, it seems like it would be a good idea. The firing part that is.
Primers are such a huge part of getting a gun to shoot at 1K, that a person would have to be a little nuts to invest all the time and effort into a gun to find out that Remington doesn't make a decent primer for it. You won't have choices here! Hell, Remington can't make the old style primers consistant when they have to compete with other vendors! How will they do on ones that they have the corner on the market for?
If you have something that you disassemble and reassemble enough times, sooner or later, you'll have two!