Considering Ron shot the 240gr XTP MAG in a 45ACP i would assume they were .451-.452 bullets and not 44 mag bullets. I may have missed something though.

It appears Hornady uses the 240gr .452 XTP MAGs in the 454Casull at a advertised 1900fps MV. Ive seen a few guys using them in the 460S&W too but i don't think its a factory load. IIRC Hornady does list it in the reloading manual at 2000fps for the 460S&W. A call to Hornady got the response of upto 2200fps for the 240gr XTP MAG. So its a pretty tough little bullet.
http://www.hornady.com/store/454-Casull-240-gr-XTP-Mag/

The 44mag 240gr is not even listed as a MAG but the higher sectional density might help it perform like one.
http://www.hornady.com/store/44-Cal-.430-240-gr-HP-XTP/

Its known to be a tough bullet and even many Savage smokeless shooters avoid the 240gr MAGs because the bullet is so tough. Not so much due to lack of expansion but due to better accuracy with the 250gr XTP non MAG. At longer ranges though they might be a crap shoot on expansion depending on bullet placement. Not all SML shooters are pushing the FPS limits even though 2400fps is not hard to achieve with a 250gr class bullet. One of my pet loads is over 2400fps with a 275gr bullet and its not even max. Its simply the limit of what i can endure and the accuracy is more than adequate for 200 yard shots.

This isn't as big of a problem for the "average" handgun shooter who will most likely try to take a closer shot. Quite a few ML shooters don't realize this and complain about lack of expansion. Especially those using low end sub loads in their ML and taking shots over 100 yards. The poor .160 BC strips off a lot of fps even at 100 yard and a low end sub load is probably slower than a common 454Casull 240gr load.