This sport is supposed to be about having fun, trying new ( to you) things and learning.
If one only learns by listening to others advice online, he really has no knoiwledge basis to advance.
Like the 45-120 prospects that jump on here all exited, only to be shot down as idiots, by the more experienced, so go the BP sub and SP users.
I think you should get out there and try it all, and develop your own opinion.
I'm fortunate to live and shoot in an area where nothing is sacred. Bring what you got and shoot it. How you do will dictate how good it is.
I started with smokeless and it only took me 6 months to Develop a liking for BP only.
Never tried BP sub, cause I figured it would be like kissing your sister, close but no cookies.
Have fun shooting the triple seven. When you get to the BP part, you can look back and know why its not recommended by the experts instead of just wondering.