Have found Hunter to work very well with 100-grain bullets in the .257 Roberts, but Magnum works better with 115-120 grain bullets. In fact I was once told by Doug Phair, the owner of Western Powders until it was recently sold to Hodgdon, that his standard load for 120s in the .257 was filling a case to the mouth with Magnum, then seating a 120 Partition seated on top.
Tried it, and it shot very well. In fact, Eileen used it for a while in her NULA .257. Muzzle velocity was around 2950 fps.
Thanks John,
I will give Magnum a try with those stubby 115 Partitions from SPS.
Just to clarify, did Doug mean filling the case flush to the mouth, or to where the neck meets the shoulder?
Thanks again,
Rex
