I was thinking a Lee 25-06 trimmer chucked in a drill after necking down would be reasonably quick.
I trim my .270 with a Forster chucked in a drill, works great.
On the primer pockets, mine is the AI version and I'm shooting 140's at 3050, and seeing loose primer pockets after 3-4 firings on just about all the brass I've used. So I'm not a good judge.