I like the FTX bullets they are very accurate they are also not for light loaders, I cut several of them and checked them out the jacket is several thousands thicker and appears to be a stronger alloy the lead is a bit harder according to my lead tester while the Shock Wave and the SST appear to be pretty pure lead.
I have not check the 225 and as its main use is as a pistol bullet it may have a different construction. My testing indicates that 2000 FPS may be the best minimum for some of these FTX bullets in particular the 250 gr .451 it takes 120 grains of Blackhorn to get a trust worthy expansion at 25 yds with my gun.