12-06-2011, 04:00 PM
As far as projo-length is concerned, the Grendel is far better suited for longer projectiles than choices like the 5.56 and 6.8. Further, our experiences with bullets like the Hornady 120 gr GMX and Barnes 130 gr TSX tell us these bullets will work in the Grendel -- and probably a lot better in the longer magazine length you describe. The 130 TSX has about the weight density and shape factor that would be seen in a copper-jacketed steel-core round. To be sure, the longer bullets have created some surprises, but these are readily overcome details, not show-stoppers.