I saw some folks asking about the XP earlier this year so I thought I would give it a try and post the results. From this sample of one it does appear to be a pretty destructive bullet. It produced a remarkable amount of damage from an 18" 308 at a distance of 300 yds. I think it did well penetrating 20" or so after destroying the shoulder bone upon impact. I believe these clocked around 2700 fps out of my rifle.

"The world breaks everyone,and afterward, some are strong at the broken places"
Hemingway