It should be about like the 30 SIL, but a little heavier (your estimate is about the same as mine on weight), and of course have a crimp groove that should be about right to use with any .308. I'd like it to be down around 170 grains, but I'd have to give up something in either the nose or the driving band area and I don't want to do either. I have in mind to round the nose a bit once I get it made and use it in my M1A. .308 bolt guns, and my XCB. If I ever get another .30-06 it would work in that, too, and probably my break-action .30-30s. Heck, it would even work in the Blackout.
Josh, if you're looking for something to do, that would be great! I'd like to see the CP/CG and weight estimates. I sent a copy to Tom last night to draw up, but that other info would be helpful. Also, we may make some tweaks....
The idea is the crimp groove will be there for AR-10s, M1As, etc. with the usual throats that they have, and for the rest of them it can be a displacement and lube groove if seating depth doesn't permit crimping or you just don't want to use it.