Your chronograph is your friend here. Load up three of several different powder charges starting with 4.3, going up to 5.6 if you wish, and go chronograph them. When you hit the top speed number that the books say you should get, stop there. If you have to pull a few bullets from a couple of overloads, not that big of a deal.
Your gun and your lot of powder are always going to be different than what the loading manuals were using. Max for your gun and your powder/bullet/case/primer combo is something that you and each one of us should find out through experimentation and chronographing. If you see or sense any of the typical pressure signs we used to rely on, you are likely WAY over max or safe levels.
LOVE God, LOVE your family, LOVE your country, LIKE guns and sports.
About 2016 team "R" candidates "We definitely need a crew with a sack of balls the size of hot water bottles, bloviated estrogen leaking feel-gooders need not apply." Gunner 500
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