See where a lot of people are wanting to convert from 209 shotgun primers to handgun primers. I haven't tested them to see which is the hottest, but I personally think the shotgun primer would be. When I pop a large rifle primer in the dark garage in my Handi I get about two feet of flame. When I pop a 209 in my H&R 12 ga I get about six feet of flame. Sometimes Pyrodex and Triple 7 are hard to ignite. I want to use the hottest primer I can get. Expecially since I hunt bears with my Huntsman.