Things based on the .308 case turned out to be real useful. I've used .243, 7mm-08 and 358 Winchester. (And of course some very accurate .308s ! )
And the ole -06 spawned some great calibers when necked up or down as well. The 25-06, 280 Rem. and 35 Whelen come to mind.
Too bad the 6.8 Mini didn't take off and become more mainstream.
Some choices for the Mini in a short 6mm, 25 caliber and 270 or 7mm cartridge would be nice, provided the ammo would be readily available.
Want a Mini in .17 Fireball, .204 Ruger, .22 Nosler, .224 Valkyrie, 6.5 Grendel, or .350 Legend ?
ASI lists those calibers and 16 others that Ruger doesn't chamber a Mini for.
Ruger Mini 14 30 Rifles Barrel Conversions New Rifle Packages Accuracy Systems (ruger-mini-14-firearms.com)
We 7.62 x 39 shooters are being left out though, as manufacturers work overtime to catch up.
Stores near me like Cabelas and Sportsmans Warehouse have shelves loaded down with every kind of 5.56mm you can imagine. Full cases of Federal XM193 sitting in the aisle and stacks of PMC M855 battle packs on the shelves.
But only a couple boxes of x39 here and there, if any.
Even though I have a good stock of handloads, PPU and Silver Bear, it would be encouraging to see some rifle ammo on the shelves that I could buy to add to the stash.