What HiredGun said is the way I do my Rems, but I will add that pinning the recoil lug is only part of what I do, I also use David Tubb's .250" thick tapered recoil lugs and machine my barrels to suit so I can get the headspace right, even with the original factory barrel.
To be sure that the headspace is correct each time I switch between barrels, I also have index marks and I only snug just past hand tight to the marks.
I have switch barrels on Rem 700's, Kinmder 8400's and Win Mdel 70's, each require a slightly different approach, but essentially are the same in regard to headspacing.
Cheers.
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