AICS Mag tough to feed

[Eurodriver]

I got a PTG DBM, Badger bolt knob, and an AICS mag for my Rem700 build this week.

It was professionally installed and the bolt is right where it should be when feeding rounds from the magazine.

However, especially with a full mag, the bolt is pretty tough to cycle. I've read that it appears to be pretty common to remove some material/bend the feed lips for the first 1/4" or so of the magazine in order to smooth out the operations. I think this is pretty ****ing retarded considering I spent $80 on the magazine alone and $300+ on the DBM. Is this true? I mean, it has to be something because the bolt is no where near as smooth as I would like it to be.

Let's just assume for sake of argument the DBM is installed correctly - because it is.