depends on if you turn em
and obviously how thin you make em....a loaded round with no turning is .289" and a good no-turn neck dia. is .293 which leaves .003 (.0015 all the way around!!)...so with a early european dim. on the reamer which is VERY big I wouldnt turn a bit....and if so a .286 or .287 should work ....Roger
PS...seat a bullet in one and see ...the new brass may be different....let us know what your dims. are...then you will be able to answer your own question....
OBTW,,,,great looking rifle.....the F-Class action is nice ...recoil lug...20 moa integral rail,,etc....I have one and set a 600 yd NBRSA score record with it at Sacremento this spring.....and Kelblys did the gunsmithing on it also!!!!grin..