Check this one out. It is a 30 Bellm. Just stubble into the idea the other day talking to my gun dealler. It can be made from 7mm BR brass and has a bit more performance than the whisper. I am going to build either a whisper or this for deer hunting in Illinois. The 30 Bellm is looking good though.

http://www.bellmtcs.com
Two proven loads are now commercially available.

130 Gr. bullet @ 2200 fps from 14" barrel.
125 Gr. @ 2300 fps, Nosler Ballistic Tip preferred.
These two bullet weights perform great on deer and give you a good trajectory and plenty of energy for 200 yard shots.

Ballistics are the same or better than delivered by the standard .30/30, but in a small package that meets Illinois requirements.