Those bbs are too soft. That's likely your problem. Typically high cap mags are more forgiving of soft bio ammo but those are one of the softest bbs I've ever tried.
Don't judge me too harsh for saying this, but if you can crush a bio bb in your teeth at all, don't run it through your guns.
I believe I may have made a poor life choice... oops.Or the early heavy bio bb with powdered lead...yeah...what...lead is BIO...its a natural material...