09-18-2019, 01:10 AM
Dropped my Ruger Predator Grendel in a Magpul stock the other day. Much improvement over the factory stock. Feeds quite well out of Magpul AICS pattern (green follower) 5 round Pmags. The newer brown follower Pmags were a no-go, follower is different (has a small ramp to feed Creedmoor cases more reliably). Need to run the bolt fast though, slow is a recipe for the round to fall off the boltface and induce a double feed. Feeds 9 out of 10 rounds in a 10 round polymer Ruger AICS mag, have to level the cartridge stack on round 7. Round 7?s head is always too low in the feedlips for the bolt to pick it up. Also, fed perfectly with a 3 round Ruger polymer ACIS mag. Ordered some Ruger 5 round polymer AICS mags to try. Tried out a PVA Dasher kit in a metal AccurateMag AICS pattern mag...should have gotten the flat spring version, the wire spring version only runs 6 rounds before I need to press the top round to level the cartridge stack and follower. More spring power may be the answer, PVA notes the flat spring is more reliable.