I have a Renegade in .54 caliber which is a lot like the Hawkins. I have shot conicals out of mine, and they shoot fine. I like the T/C maxi ball in 430 grain but they are a little too much for deer. I also have a LEE R.E.A.L. mold that makes a 300 grain conical which shoots fantastic out of the Renegade. I will advise that you might want to use wonderwads or bore buttons. They really make a difference. Years ago, I did shoot some Great Plains Conicals, and they were fantastic for shooting. I have never tried sabots out of the gun and do not think I will. It is also a fantastic roundball shooting rifle. If I were you I would get a few different weight conicals and some wonderwads, most come pre-lubed but if not a little bore butter or crisco will work, and try them out. Any reason to go out and shoot is good enough for me. Have a good one.