I don't see the .45 GAP as having much of a life.
I wish the 7.62x28 Tokarev were bigger in the US. It's the round that the 5.7x28 wants to be.
I'm not convinced of the longevity of .500 S&W. The .460XVR as a "hypervelocity" handgun hunting round, I can see. But, the .500 is kinda like the 50 AE. Its niche is irritating people in the adjacent lanes.
The other fantastic round to go away is the .38 Super
It's "died" many times. It's still real popular in Mexico and South America, and thus you can see a lot of it near the border.
As long as it's still standard issue for several large LEOs, I don't see it falling by the wayside quickly. It's very easy to find here. However, in some areas, it's hen's teeth. Not a bad round, but it fills a very narrow niche. I have a drop-in barrel for a SIG 229, but once I shoot up all my ammo, I probably will "retire" it and stick with .40s for the remaining life of the gun.
The excellent combat round that should have been but never was; the 6.8mm
It would have a chance if
- There was a rifle built around the round
- That rifle was widely issued
- The other countries in NATO like the round
As long as it's "just another upper", it's going to continue to be a boutique round. There's no niche being filled beyond "I want a .243 that fits in a AR-15" Same for the 6.5 Grendel and all the other "I bought an AR and someone convinced me that .223 was for poodles" rounds. Just buy a darn M1A, AR-10, or FN-FAL and be done with it.
Possible the 30-06 even, as I suspect sales of .308 are currently much higher than 30-06. But, again, we're talking a LONG time before it goes away, or become unpopular.
A couple of generations will need to die off before that becomes a possibility. There's just too many rifles with it, and there's just too many things you can do with it for hunters or reloaders to abandon the cartridge. Now, if it were invented
today, with a .308 and a .300 WIN MAG around? It wouldn't have a chance. However, it's the cartridge that Won the War, and it's good for anything on this side of the world.... it's got legs.
I wish that 7.62x39mm and the 5.45x39mm are the next rounds on the way to out being replaced by wide spread acceptance for the .223 and .308. Think of the possabilities, no more AKs
They make AKs in .223 and .308 already. Not general issue to troops, but to sell to folks who cleave to NATO.
Shouldn't the GAP stick around just because it is made to fit in a 9mm or .40 cal frame? Seems a lot of pistol makers would find it easier to make a GAP than an ACP.
That was the originating thought... "people want big holes and small pistols." In a lot of ways, the 9mm/.40 markets are a little different than the .45. It looks good on paper to make a .45 that fits in a 9/40 pistol, but you're basically asking someone to get accept less capacity for the same power out of a hot .40. All you get is a bigger hole, which is good in some respects... however, the .45 shooters I know want a big hole with a lot of power behind it. They've already made the trade off. If they wanted a 9/40 pistol, they'd have gotten a 9/40 pistol. Instead, they got a .45 ACP, and they're fine with it. Especially if they got a 1911.
I also don't see why you would go from a 9/40 to a .45 GAP. You've
already decided that capacity is an issue to you.
What I like are the rounds that "came back" like the .45-70.