2eagles
The first thing I might suggest is to switch rings - swap the front to the back and the back to the front if you can... Believe it or not not all rings have equal heighth.
Shimming is an option and it will work.
I have several 3200's mounted on different guns and have not ran out of adjustment on any of them, including the ones on my Omega.
Another avenue is to contact Bushnell and ket them know the problem - they might just fix it real easy for you.