You can find it on the Crosman web page. The JC Higgins model 180 was made by Crosman Air guns. See the link below
Stevens made jc Higgins shotguns ,the model 311 interchanges with the jc Higgins
The JC Higgins Model 45 was made by Marlin and is basically the same gun as the Model 336. Manuals are availabe from Marlin Firearms. The JC Higgins Model 66 was made by High Standard and is out of production. I have a manual scanned, and can email it to you. firstname.lastname@example.org
Sears' JC Higgins Model 25 is the High Standard model A1041 .22 auto
The JC Higgins Model 30 was made by High Standard for Sears from 1950-1953.
The JC Higgins Model 31 rifle was manufactured for Sears and Roebuck by Hi Standard.
need info on jc Higgins model 60 12 gauge shotggun
1958 to 1962 for jc Higgins
Do an internet search for SAVAGE 311 OWNERS MANUAL
I found one @ http://www.histandard.info/manuals/sears/rfrifles/index.html