5.5 gr Power Pistol  and a 124 RMR HP at oal of 1.055 is my standard load that works in ALL my 9mms

When I  first got a Witness I  had the same issue. Changing springs made it harder to rack the slide but didn't make. Much difference in the launching of brass. A helpful member of another forum who knows the Tanfoglio pistol well. Explained to me that they all use the same ejector..... which means that the ejector engages the brass "early" in the 10mm compared to the ejection cycle of the gun in 9mm. SHORTEN the ejector and the brass is ejected less violently. A few minutes with a dremel got my brass landing 10-12 feet away instead of 35-50 . I could shorten a bit more but I  want positive ejection and I find it acceptable at this level.