what can be done to keep fired brass in the same area code?

Welcome to the Forum Cdan
You can try a heavier Recoil Spring
And / or re-facing the Ejector with a slightly downward and rearward / right facing angle

Extractor shaping is the best bet.

Thanks,
Dan

Quote from: sqlbullet on July 13 2015 03:36:49 PM MDT
Extractor shaping is the best bet.

I believe you're thinking Ejector reshaping, not Extractor
Bevel the Ejector down and to the right a bit
Check here:
http://www.czfirearms.us/index.php?topic=8209.msg78580#msg78580

yep...Brain fart or old age.

Do-hickey that hits the brass....

Here is a thread on the topic:

http://10mm-firearms.com/gunsmithing/eaa-witness-elite-limited-ejector-shortening-project/