Great cartridge! I am currently working on a .257 Roberts deer load myself, and I am using the 2 powders Dan mentioned with Speer Grand Slam 120 grain bullets. So far I am liking the 4350 better. I have a Ruger #1 I am shooting. I have not seen the new G&A, but would add that Handloading recently did an article on it too, within just a few issues, I'll try and remember to dig it out later and let you know which one.
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Geoff. Since 1960.
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