I would suggest you try 4064. For years my favorite and most reliable 220 Swift load has been Win brass, Win LR primers, 37.5 grns of 4064, and a 55 grn Sierra bullet. In a 24" barrrel you should get around 3700-3750fps and that will take care of just about anything from gophers to whitetails.(If you put it in the right place.)
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