The new long actions have center feed magazines and there are even fewer stock choices than the 4.4" short action centerfeed magazines ....

I have a .260 on an older .270 action, works great, can seat bullets way out, especially the 140 Bregers which like to be close to or into the lands. Can get the 140 Bergers to around 2900 fps very accurately.

Working on setting up a .284 on a LA also. Been doing some Quickload load workup and there is a significant velocity advantage to seating the bullets way out.