Earl,
This may sound strange but, have you updated any drivers on your PC around the time your rubber bullets started? Have you installed any new programs? Did your antivirus program receive an update to it's engine along with the latest definitions? Have you allowed Windows Update to install hotfixes?
Sometime Windows Update turns things on that you have disabled as part of finishing the update's install.
Do you run a batch file or application befor starting the game to reduce your running services down to about 32-33? This is where Windows Update screws you sometimes because you don't count services after updates thinking MS wouldnt dare do that.
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Have you turned your router or broadband modem off and let it sit for 10 minutes recently? Sometimes with ATT I have to do that when I get rubber bullets in AH. When I start it back up I also get a new IP address and a temporary halt to automated scans of my ATT IP address by IP addresses registered to hotels in mainland china.
Something to ponder, how old is your router or your cable\dsl modem? A few years back my first ATT DSL modem was getting old and I had a long streatch of rubber bullets. I replaced it and started hitting things again. I've had the same thing happen with routers going bad. Another thing to ponder is if you login to your broadband provider with PPPoE, is your router MTU and network card MTU both set to 1492?
You can download SG TCP Optimiser from here to test your MTU window size for packet fragmentation on the way to the game server. Packet fragmentation can cause rubber bullets.
http://www.speedguide.net/downloads.php/--------------------------------------------------------------------------
I recently caused my own rubber bullets by installing the latest and greatest ATI drivers for my video card. I had to roll back 3 versions and my .50cals started sawing wings off again.
If Hitech was going to change gunnery it would happen during a patch release as a global effect to every player. If your rubber bullets are not happening right after installing the new patch. The source of the problem is anywhere from your PC to the internet path to the game server.
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Have you run PingPlotter to 206.16.60.38 to see whats happening in your internet path to the game server?
Have you performed normal house keeping of your harddrive like a comprehensive defrag along with a boot time defrag?
Have you checked to see if something is phoning home from your PC that shouldn't be on your PC?
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Whenever I get rubber bullets and it's not immediately after a game update. I run through this kind of laundry list of steps and it usualy comes down to one of them. More often it's just a bad night, or even a week on the internet between me and Texas.