Being fortunate to own a Pre-war Winchester M/70 .257 Roberts, I would like to deer hunt with it this coming season. I'm looking for a good load for Whitetail deer, shots will be 100-200 yds.. I have been shooting Federal Light Magnum for a foctory load and the rifle groups them well. Looking for a handload using 115-120 gr. bullets and IMR powder. I have several pounds of IMR-4064 that I use in my .35 Whelen, if I could utilize that in the .257 that would keep my powder inventory from getting too extensive.