I am with Don on this one. Yes it creates higher pressures. I used to shoot bench rest, and touching lands or just off was the norm for accuracy. When Weatherby designed there magnum line of cartridges, to compensate for their massive powder charge in the quest for speed, would free boar (deeper throat) their rifles for keeping pressure down. This is with bolt action rifles, so pistols are a whole other beast as strength comes into play here. If you are watching pressures, I do not see a problem, but not a pistol loading authority either. I always just stayed within the book specs, and never had an issue. The cartrige also has to cycle and function action properly in a semi auto.
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