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#7 is pretty slow on the burn rate chart for 45acp.
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I agree, but I have loaded Blue Dot with good results using WLP. and 230gr Speer Gold dots for my Colt 70's ser. and the Marlin camp carbine. The loads I tried with AA#7 did not perform as well as the Blue Dot loads for both guns.
AA#7 works well for my 3" .44spl but only with WLP this was not always the case, but things change. All the more reason to rework your loads with different powder lots, and to buy powder in larger quantities.
For my Colt .45 acp I have a over sized firing pin stop that I fitted to the gun for higher pressure loads, it works well and reduces the need for a heavier recoil spring.