RE: 257 roberts/imr 4350?
The very best and most accurate powder I have ever used in my
old Rem. 257 Roberts was IMR 4320...I can't remember what the
loads were now,but that stuff worked with every bullet I tried..
Killed a lot of deer with that old rifle..Reading you post brought
back memories..Wish I still had it.That was 30 years ago...
Good luck with your and be safe---Happy Holidays