[AppyPappy]

Is there an issue with modern ammunition?

[DesertRhino]

There is a range of serial numbers to avoid below a certain number where the receivers were improperly heat treated and can be more brittle. It’s a well known thing you’ll easily find online.
Other than that exception, modern ammo is fine.

[2harddrive]

You could check in one of the forums in here: https://gundynamics.com/about