I've used them both and they are excellent bullets. Often, I get better accuracy with the flat based bullets at 100 yards, but the BTSP has a better BC for longer range trajectory. I've used them both on deer in the 30-06 and 300 wsm from 85 yards to 600 yard and have not caught one in an animal yet...
Have to agree with BSA here, used to push the 165 BTSP's to 3450 fps back in the day [late 80'searly 90's] in a 300 WBY, don't ever remember catching one in deer and pigs, I just simply blew the chit outta everything.
