62 grain or greater 5.56 ammo.

[Carpenter 409]

Any of the ranges I use the range masters check ammo with a magnet, if it sticks you can't shoot it. Looking for 62 Grain 5.56 (shooting out of a 1-8 twist), what do you have either in 500 or 1000 round bulk.
Strippers are good but if it's true bulk that's OK too.

[VenturaMunitions.com]

Hey Carpenter, we don't have much plinking ammunition in that grain weight. This would be the best bet, it is a 62gr FMJ and they are non-magnetic.