Yep, i am shooting the .429 XTP bullets in 240 grain and 300 grain in the short black sabots. i also have the long black .429 sabots but do not like them at all. The 300 grain XTP bullet has two cannelures. i also have the green .429sabots, but IMO they are not very good. Thw long black sabots that i have the stepped base. Some of the short ones also have the stepped base and some do not.