I think I have solved my "Rubber Bullets" issues in AH2.
It has been horrible since version 2.6. First I had video stuttering, CTD's and other frustrating stuff. I got that cleaned up, but still had rubber bullets. I would shoot the kee rap out of a bogey, and see someone else kill him, and I would not even get an assist. Often they would fly away only smoking after 5 or 6 hits from 30mm guns. I emptied 120 rounds at a 234 from a 163 at under 200 yards, with many many pings, and at the end his engine started on fire. It was frustrating

Anyways, I tried one more thing before dumping the game until the next version. I replaced the LAN port on the mother board with a PCI ethernet card. My guns are back to normal now, maybe better than ever.
It is like a new game. I even got some kills last night with the 50 cals in a Pony D. I had 2 kills, 5 assists, and 2 shot up bogeys ditched on me. That is the most damage I have ever done with a load of 50 cals.
All in all, I am pretty optomistic that my AH problems are over until the next patch

Then we start again with the problem sloving
