I just got the 209 conversion kit for my bighorn. Long story short, i stongly urge anyone with a bighorn to NOT convert to 209. I had 3 out of 8 of the full plastic jackets blowback so violently that the primer was dislodged from the plastic jacket and the fpj was lodged sideways between the nipple and the hammer. Almost identical to the pics sabotloader posted of the 209's with the bare nipple. I ended up yanking out the 209 breech plug and putting the #11 back in to try and salvage my day at the range. The 3 shots that had the "dislocated" primers were horribly off my group, like 8" in all directions. And that particular 209 setup causes a filthy mess everywhere. The entire hammer was black, all the way to the spring and the threads that lock it in place. After 8 shots. Not trying to ramble on, just felt i had to chime in on this. Never had an issue with #11's, just got lured in to try something "better". 209's are probably great in a different rifle, but have no place in a bighorn. Just my .02