aucontraire BG they are different in construction and design. Main difference the Ab is bonded and BT is not. The BT has a design upper ceiling limit of which Nolsersays3000fps at impact(many feel this is optimistic and should be a few 100 fps slower). The Ab has no upper velocity ceiling attached to it. The ABis design to retain 60% of its mass. Just like the nolser partiton front 1/3 is designis shed to create a larger wound channel (=more trauma) and the remaining portion is their to pentrate deep (thru bone, muscle and tissue). The BT is not really design to hold onto mass persay, in fact i have never recovered one intact (most have blown through but the few that didn't pieces were all that was left -hence the RAPID expansion design/class given to the BT bullets).

Both bullets are really built for longer range, IMO their is no need for either if you don't expect to shoot 200 or further with regularity (much better to go with a flat based bullet like the Nosler Partition, Barnes TSX, etc).

AB deer and uplargerorneed pentration/retention gaurantees. BT for deer sized and understand that if you hit the shoulder at rate of speed expect some losses (bullet pentration, retention and meat)!

I like em both but migrate back to the NBT, just flat out works for my situation is cheap toreload and deadly accurate in my rifles.