Rem 700 short action base works on the 600.
Just took one off a Mohawk.
Had low turn in front, windage adj rear.

I prefer Burris Zee rings.

Used 700 2 pc base set, only one screw in the rear. Folks say that works fine. Ordered a 1 pc, will mill a slot in it for better access to load.

But until that arrives, gets the mod......am running 2 pc.
Just a .243 win.

Burriz reg Zee had the bolt handle close. Signature Zee (posiline insert) noticeably taller (more clearance) but still decent cheekweld.

Eventually rebarrel to .300 sav and drop into laminated stock.

Rain this weekend, the Ruger RSI stays home. Beater 600 is crap weather rifle. Zero in tomorrow.