'Old' 30-40 ammo

Recently a friend gave me several dozen rounds of 30-40 cartridges, older stuff-probably dating back to ???. None have 30-40 stamped on flat of case rim, but are marked:
PETERS 30 USG----PETERS 30 USG----WESTERN 30----REM-UMC 30 USA---WESTERN 29
Some are soft lead points, others are FMJ. Thought about shooting them in the Krag I bought last summer, but am wondering what would be the approximate age of these rounds. I'm not real 'up' on older ammo ID and it's value, but can tell if it is of recent manufacture. I'm sure these would be safe to shoot, but am wondering just by the case ID I provided if any of you in MILSURP land can advise if these may have a value as far as collectability. Even if they aren't of any value, it wouldn't cause me to lose any sleep not to fire them. I'm just about ready to drop powder and bullet in some of the brass I bought for shooting. Factory stuff is to scarce and pricey anyway.

They may not even go bang, they are old. 1930s...? The powder may have turned back to liquid or be perfect. The primers may be prefect or dead. Maybe a bit of both in both. The cases will likely fracture at least neck crack. I've taken lots apart and reprimed and charged them, then the case doesn't stand up. Re annealing may help. I don't think they're particularly collectible. Keep one of each and go from there...

Thanks, I did have concerns about them, not knowing how well they were stored from excess heat or anything else that could possibly render them useless or not safe to shoot. My friend got them from a long time former Sheriff/Deputy Sheriff in a county where I was a Police Officer and I have a small electronic signal in my skull that these might have been some from a case way back when. Seems to me I recall some talk about it when shooting the 'bull' at the SO once. Don't want to mess up my shootin piece on account of several dozen rounds that were free in the first place. I'll have to ask the former sheriff the next time I see him where they came from. I think I'll leave them as is, I've a good supply of new 30-40 brass to reload.

Western 29 is 1929 manufacture.