I believe the XTP’s are more of a hunting bullet. I use Speer Gold Dots. Speer says their bullets are bonded core. To me there plated heavily. Kind of in between lead and jacketed. Check out this link –
http://www.speer-bullets.com/default.asp?s1=5&s2=15
click on - 44 Special and 44 Magnum with 200 gr GDHP