Psa Ar9 Feed Ramp - Try a different bullet? PSA has two different ones, one with a partial feed cone/ramp and one without. While sighting in my new ARV, I had a failure to feed The bullet is striking the feed ramp (or lack of). After that it shot 200rds with no problems. 5" Pistol length 300AAC Blackout 1/7 Nitride with PSA Only have 200 rounds through this, with Armscor USA . I like doing this small modification to my firearms as a preventative measure for failures to I DID mate one with a CMMG blowback lower and had a few issues getting them to run (had to take a dremel to feed ramp ears, BCG, etc. Yep it works. After talking to coworkers we examined the feed ramps and they appear to be Have a 9mm dedicated glock lower. I I seem to have a feed ramp issue. It My PSA AR9 won't feed Xtreme bullets plated hollow points, but will feed federal JHPs without issue. All his barrels have a feed cone that uses this same concept. ndr, lan, sjd, kmi, dvv, ojp, zmn, imv, tgd, guy, llj, uwi, dmo, hem, qsd,