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Unless you are determined to use the 139 gr bullet, try some different bullets. I haven't checked the max loads, but if 67 gr is the max load for your gun there isn't going to be much velocity difference with 66.5 gr. If that is the most accurate why not use that? I haven't personally found a 1/2 gr powder difference to make that much difference, but it evidently does in your gun. If I got 5/8" groups at 1/2 gr below max I wouldn't try anything else. If you just want to play try different seating depths. Sometimes different powders make a difference. Jerry
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