Senate Bill 1985 passed out of environment committee based on party lines IIRC. (Official record on ILGA web page is now showing 5 Y 3 N and 1 NV). Its now up for additional readings, discussion and vote in the Senate
http://www.ilga.gov/legislation/BillStatus.asp?DocNum=1985&GAID=14&DocTypeID=SB&LegId=105382&SessionID=91&GA=100
Synopsis As Introduced
Amends the Wildlife Code. Provides that it shall be unlawful to use lead ammunition to take wildlife in State parks or natural areas. Defines "lead ammunition" as a projectile containing one or more percent lead by weight. Makes conforming changes. Effective immediately.
2/10/2017SenateFiled with Secretary by Sen. Don Harmon
2/10/2017SenateFirst Reading
2/10/2017SenateReferred to Assignments
2/28/2017SenateAssigned to Environment and Conservation
3/9/2017SenatePostponed - Environment and Conservation
3/16/2017SenateDo Pass Environment and Conservation; 005-003-000
3/16/2017SenatePlaced on Calendar Order of 2nd Reading March 28, 2017
https://www.nraila.org/articles/20170316/illinois-committee-passes-lead-ammunition-ban
Might be a good time to please contact your state Senator and politely urge them to OPPOSE SB 1985.