I have seen a couple in 45-70 and we know they will handle 303 brit type pressures.
What are you thinking of making?
I am guessing you are looking at American calibers with a rim.
So 22 hornet, 256 Win, 25-20, 30-30, 30-40 Krag, 303 brit, 32 win special, 44-40, 45 colt, 45-70, 50-70 no problem As well as any of the T/ C contender wild cats. Like the JDJ series based on the 444 Marlin case. The bruiser 375JDJ would be neat. (Micro 375H&H)
Pretty sure that the 357, 41, 44 mag and 444 Marlin would work as well.
Possibly 308/30-06 and family of rimless
.348 Win.
As far as your 45-90
I do not know if the case is too long and fat to feed into the action.
I have also seen a couple made into shotguns. But they were smooth bore strange guage by the south africans. Would be a really neat trap gun.