Mmmmm, maybe Im not explaining this right. Max loads for barnes XLC bullets contain more powder than max loads for conventional bullets. This allows you to safely drive XLCs at a higher velocity than a conventional bullet. You are correct when saying that one should not use XLC loading data for TSXs, explains that right on their web site. My ? was is the max loading data for TSXs higher than the max loading data for conventional bullets? there for allowing me to safely drive a TSX bullet slightly faster than a conventional bullet, just like I can with a XLC. Whew I hope I nailed it this time. Lol. When I was reloading XLCs for my 7mm08 I actually couldnt put enough powder in the case to meet Barnes Max load. I was quite happy being able to push a 140gr XLC at 150fps faster than a conventional bullet.