Deep penetration was my deal since '92 when I started using the X bullet, recovered very few bullets over the years, most were .358 bullets and mostly on quartering shots on moose where they would be found under the shoulder blade or sometimes just through it. Started using Accubonds this past year, mostly for their ranging ability, high BC, in a 200gr 30 cal and 250gr in a 9.3. The X bullet mostly passes through but does it do maximum damage on its trip through the animal, so I changed to find out. The 9.3 cal/250gr passed through the moose and I did not get a chance with the 3006 this season. I was looking for experiences with both , but for years Swifts in my area were/are uncommon.