Semi - Sorry to hear your resized bullets didn't work out for you. You may want to try the 200 gr Hornady 10mm bullets. They are shooting good for me out of my GM 45 using the Harvester 45/40 EZ load Sabots.
I've got some 180 grain10mm Gold Dots ordered
bronko. I wonder how they compare to the XTPs in terminal performance?
I haven't given up yet on the Lees sized to .451. Will be trying them with felt wads and a wider variery of loads with the GOEX, plus Pyrodex and T7. Would sure like to find a load that shoots them well.