270 WSM busing dies are the way to go. You could get by with the 270WSm seater as well, but I made myself a seating die. 140 bergers at 3180 from a 28 inch 8T kreiger is not too bad. I have been needing to try some 17 in em but they are working with with VVN560.
I have built about six or seven of these things all for myself. Every time I build one I let someone shoot it and it follows them home. I have done at least three on SAs and they were fine. I have some seekins DBM sitting around that would get COAL a ways out there, so I am going to try SA again.
I can slum a conquest every now and again. I have a buddy who is a big time internet retailer. He lets me know hen he is selling demos and prices accordingly. I have to say that I have never had one crap out on me yet.