I have a number of possible bags. Some are actually maybe fifty years or so. The reason I say this is when I was very young a person gave me their old possible bag as a gift! I was very thrilled. I use a different bag depending on the caliber and the type of weapon. For instance one is for black powder revolvers and .45 caliber rifles. One is for flintlocks. Another is for shotguns. It just makes it easier for me to keep track of jags, mops, etc.