Truth known very few specialty or wildcat calibers as they are called stand the test of time after their introduction. Most of the tile the owner of the weapon ends up loading for them due to availability and then short productions of commercially made ammunition for them and finally it doesn't pan out for profit and the companies stop loading for the round causing the owners once again to start loading for them and also to locate reloading materials if it is still available? The only wildcat caliber I have is the 6.5 Grendel and the 458 Socom. Bullets for both are easily acquired and I stocked up on casings in advance. With some work 6.5 Grendel Cases can be made from 7.62X39 brass if need be. Both are using quality hand made loads. Primers are standard primers.
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America will never be destroyed from the outside. If we falter and lose our freedoms, it will be because we destroyed ourselves.