Thanks a lot for that info. The paper that came in the box of TSX bullets said that you may have to exceed the data for the 120 grain X bullet to get the velocity from the TXS. This gives me a good statring point. In the past, I have used the 120 grain Sierra Pro-Hunter bullets in the 280 for deer. I kept the velocity down to about 2850 with the Sierra bullet thinking that with its low SD, it may be a bit fragil. I did get pass through on all the mule deer that I hit with them but no hit to big bones were involved. With their constuction, I think the 120 TXS should be a very good deer bullet. Thanks again.