I load my .40S&W right on the hot side with no sign of over pressure... pushing plated projectiles... I load power pistol exclusively in the .40, because I want to shoot the .40 as it should be....

Power Pistol no matter the load or caliber has an inherent crack that I love its a rather loud boom and makes quite a fire ball out of the CHP4006TSW/Shorty.40 (note I do dial loads back spficly for the shorty given its alloy frame...

Best advice I can say is work loads up to what you want and air on the side of caution... the .40 should be fine in a gun ment for 10mm...

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