Good shooting Semi. I was also surprised when I shot some 150 gr Noslers out of my GM .45 and they hit the same POI as the 200 gr XTPs.
Just wondering, why don't you try some 70 gr charges next time out? Looks like you got a good shooter there and maybe a little 'tweaking' will make it even better.
Now I have a hankering to go out shooting myself but its hot. 85 degrees - not fun shooting in that heat. Especially with no shade.