If you are interested in shooting BH209 in a Huntsman you might find that the aftermarket smokeless barrel from the guys that make them is a better choice as I believe their barrel uses a 209 primer without the plastic insert. (I have not read if they work but the guys that make them would certainly know). I think it is smokelessmuzzleloading.com. The .25ACP conversion (I have one) will not ignite the powder with any confidence. It requires a real 209 not even the special muzzleloading 209 primers will work all the time without hangfires. The additional benefit is that you could also shoot real smokeless if you wanted to. I have only read one negative report from someone that had the barrel. The other option is spend about the same money and buy a rifle that will shoot the powder (CVA Optima, some of the Traditions, T/C Omega, CVA Acura which I would pick as it has the Bergara barrel).