You could pull the load....I don't
You could shoot it out......I don't
You could leave it in........I don't
You could use a Co2 discharger......I DO!

They use almost a whole cylinder per use so figure that price first. I figure I will only hunt about 4 or 5 days total with my flintlock so buying one box of cylinders per year is not a big deal to me and well worth the convenience. I think it it much safer than any of the other alternatives. I did have one instance of a base of a powerbelt staying in the barrel once, so always check your bore before loading. I now put a tube sock over the barrel and collect the bullet for reuse. You can do that with Powerbelts because they come out looking the same as when they went in. Not sure if it is a good idea with other kinds of projectiles.