Iffy for now. review 1) - Barnes Precision Match 6.5mm Grendel 120 grain Match Burner Open Tip Match Boat Tail Centerfire Rifle Ammunition

I have shot 8 rounds with this ammo out of a new build with about 83 shots through it. After the first 4 rounds I notice that the front of 2 cases were bent indicating there was an issue, so I took the bolt apart and noticed the ejector was re-milled to fit a 6.5 Grendel and it was extremely loose, so I replaced the ejector with a JP 6.5 ejector and it solved the loose chambering issue then I removed the 3oz buffer and put in an adjustable buffer. I took it out for the second time and still had over gas issues. I will update this review as soon as I get out to the range again to try it with an adjustable gas block to see how it performs. Out of both trips @ 100yrd I seem to be holding a 1-3/4" group. I'm not happy with that grouping and I'm trying to figure out what could be going wrong without blaming it on the ammo but if I end up with the same results after the third trip then I'm sure it's the ammo because I've tried every other fix I can think of and it still shoots the same.