Are they new Mag's Monty? May just be a case of loading and unloading them a few times to wear the springs in.
Also, if they're not very firm in the magwell you could try a bit of eletrical tape on either side at the top, this usually works to help feeding problems with other magazines.
Failing that, if you're set on Emags and prepared to spend the money you could change your hop unit and see if they feed better with an alternative.
Someone feel free to correct me if I'm wrong on anything, still learning myself