Action for 7mm saum

[17remfreck]

Hi all new to this group
I'm planing to build a 7mm saum using 168gn VLDs with ar2213sc or ar2217
On a CZ or Winchester 300-338 win-mag action (if I can find one)
My question is can I use a STD length throat reamer or does the throat need to be longer ? so I can play around with seating depths
Barrel length ? 26 or 28in
Thanks for any info you can share