looking for a 6.5gr bolt gun

[Bottomdweller]

I think the inherent problem is the cartridge itself. I would bet that other howas chambered in the longer cases feed better than the shorter grendel. The problem I had with all of the mags I worked with was the shoulder being so far back from the tip making the ballance of the cartridge too far forward. A longer case with a short throat facilitates feeding from the mag.