What are the dangers of using 5 year old aluminum cased ammo?

Recently became a gun owner again after purchasing a G19 offline (nowhere to be found during covid locally) and bought all the necessary accessories BUT I'm kinda lacking in the ammo department. I'd say after my first 100 round range trip I'm gonna be down to only having my 4 mags full and no spare anything. 

I did however have the foresight to keep all the ammo from my previous guns I've bought and sold over the years AND they've all been 9mm so all the ammo can be fed through my new gun. The issue is some of the ammo is upwards of 5 years old at this point (all carry ammo I've spent every range round I've ever had) and hasnt been stored ideally. But none of the rounds have rust on them and they're all good brands, Hornady, Barnaby, Federal Etc. and all primers look good to go I've scraped up around 60 rounds looking in my car and around my house. So the question is should I give them a good dust off and keep em to the side or should I have a good day at the range with em and just call it a day.

OR the horrible third option. Are there hidden dangers I should know about? When I started keeping em I woulda shot em without thought but now that in wiser I'm a little skeptical.  Would love to know if I have to re buy any of these rounds which have all skyrocketed since lockdown and beyond.

P.S. RIP Yahoo Answers I've been coming here for years sad to see this might be one of my last questions