I have had issues with the Gen. 3 ,LR PMags , had to send two back , they would stick in the Mag well & had feeding issues , in all my 308AR's . It was from their new facility after moving , so it was probably a production issue , no problem getting replacements that work fine . I started a thread on it around here somewhere .
The issue or difference between the two , as we all know is ,the Feed Lips , that is where any Plastic mag will fail , the Lancers eliminate that potential issue , but for a price , thats for sure . There are many gunners that will flat out not use a Plastic Mag in their Rifle , true its their loss , but thats the way they feel safe to use Steel only . The Lancer is an answer to some of these people , some still will not use a Plastic Mag , no matter what it has on the feed lips .
Having the Follower not follow the Cartridges the full length of the Mag , could be several issues . I would have had Lancer figure out the issue , could have been a bad batch of Springs from a supplier, in any capacity mag. , the weakest part of the spring is with the Mag empty & if its weak at the end , an out of spec or weak spring to begin with , will have the potential to cause issues . The Bolt catch would be one of them .