All the bullets mentioned above will do the job, my choice for bang flop out to 150 would be the 250 gr speer, where a lot of people run into difficulty is with the sabot there are a number of possabilitys here that are didderent thickness, due to the wide tolorance used by muzzle loader manufactures any one of them might be what your rifle likes, I always recomend getting a selection and taking the beach plug out and trying them with the bullet of choice before going to the range if they are to tight so you can not load them with out undue force or if they go down to easy then eliminate them before you go to the range if they load good but just a little bit tighter than you like they will likely work ok. by doing this and picking a good bullet for the twist and a standard load like 100gr you have a much better chance of having a good first try. Lee