any decent in-line will work. i know folks who use those "package" muzzleloaders, the ones that come with rifle, quick loads, some cleaning stuff, etc. enclosed in the clear plastic. i've used a tc black diamond and a tc renegade. both easily killed elk. i used 348gr hollow point power belts in my in-line to kill several elk. i use maxi-balls in the renegade with the same effect. i use either 90 or 100 gr of 777 in the in-line.