Compared to most std cup an drawn bullets like the game king, power point, corelokt, and inter-lock the billistic tips are designed to expand at a faster rate due to the effects of the tip. This was a classic mistake in choosing the wrong bullet design for the task at hand (close shot from a higher velocity cartridge). If that shot was at 200-400 yards you would have loved the b-tips perfaomance.

For the 270wsm try the 140gr partition or the 140gr accubond if shots mainly at longer ranges where the pointier accubond would be an advantage. Or for shots under 200 yards any of the none tipped hunting bullets of 150grs for that matter.