I'm one of the ones who had trouble with the earlier onesI'm afraid to try them again. I take quartering shots thru shoulders sometimes and hit bone at times. If the new BT's in the heavier cal bullets are thickened up now then I'd say theyll work fine. I use smaller weight foe cal bulllets so I think I'll hold on to the accubond. The only difference between accubons and BT is that the jacket on the accubond is molecularly bonded to the core to prevent core/jacket separation. The BT is not bonded the same way, but for example, you will get sililar results with a 140 accubond or 160 BT in a 7mm. With the 160 BT probably leaving a wider path.