This is all just a bunch of reasons for me to own a bunch of guns! So if you need a excuse to buy more guns then please read the following. I like the 45 GAP. I made a choice to have guns in still common but less popular calibers. As long as it works. I like to own and carry a gun that is not so common. Some like 45acp but not 45gap. I like both. The more guns I own in different calibers. The more likely I am to be able to use ammo I find. Some have many guns in the same model and caliber. Dose it make sence to have as many calibers in a gun model as posible? At least make one of your five 45acp glocks in 45gap? Or one of your seven 1911 45acp guns in 10mm? When ammo went away last time. It was the standard ammo that went first. The oddball ammo lasted longer. And came back first. I want to be able to get ammo even if it costs more. Start with common caliber guns. Then consider others. It looks like I have about 25 different calibers at this time. Not that hard to do realy. I enjoy learning about different guns and ammo. There is 45colt,44mag,10mm,357,7.63x25,45acp,45gap,40s&w,9mm,380acp,32acp,25acp,22lr. In handguns. And 50bmg,45-70,375win,30-06,308,30-30,22-250,223/5.56,7.62x38,30carbine [8 of those!],5.7,and .22mag. In long guns. I could be missing some. I have a lot of ammo for the military caliber guns. Not so much for the others. Maybe a couple hundred or so. Enough to make the odd caliber guns usefull if needed. It started with buying several rifles and handguns to do different jobs. At the same time I bought guns I liked and the caliber just came with it. I don't shoot some of my guns a lot. But I will allways have a bunch of different calibers. The last ammo scramble we had turned common caliber guns into expencive clubs! Heaven forbid we ban military caliber guns like so many other countries. Even if you have five lifetimes worth of ammo it could make you a criminal to own it! People may understand you have a lot of money in guns and not pass a bill taking them away. FMJ ammo. Most will think. Thats what the army uses! People shouldn't have that! The average person dose not understand or like the idea of you having thousands of rounds of ammo. They may pass a bill taking away all but a reasonible number of rounds. And that could be as little as a hundred. Certainly not a thousand. After all what do you need with all that ammo? You must be a nut? Washington state tried this a few years ago. If things got bad. Or laws were passed. And no more ammo was made. In twenty years will 5.56 or 7.62 be laying arround? Or 375 winchester? When my ar-15 is banned I will still have my 30 carbine. And when that is banned I will have my 94 30-30. Dont put all your eggs in one basket. But a bunch of eggs in a bunch of baskets. And if nothing happens and we dont use our guns . Just think of the all the different and cool guns you will have to play with! So have you looked at how many calibers you have?