I've seen 30-30 loads from 4.5 gr to 9 gr on different internet forums. 5 gr should be fine.
These are good places to look for reduced load data.
http://www.hensleygibbs.com/edharris/backcreekdiary.htm
http://www.gmdr.com/lever/lowveldata.htm
No unique on hand and running low on trail boss. Got 5 lb of titegroup so thought I'd give it a try.



























