I use one with my flinter. I have one problem to report: When discharging Powerbelts, I have had the bullet come out and the powder blow thru the hole in the plastic base, but the plastic base stay IN the barrel. I then have had to use a bullet puller jag on the ramrod to remove the base. Not really a problem, as long as you realize what is happening. If you don't realize it and load again, I'm not sure how things will turn out. I put a sock over the barrel and catch the bullet for future use. If you use the Co2 cartridges that are for air guns, they contain oil that will contaminate your barrel. They make special cartridges for discharging MLs that contain NO oil. I recommend them exclusively.