It is not recommended to shoot slugs with a power pack chock on a JC Higgins model.
1956
1957 more likely 1961
just bought one in like new condition for 150$
The value of a JC Higgins model 2012 gauge 583.59 is $250.
Measure it, or have a gunsmith measure it, with a choke gauge.
A 1953 JC Higgins shotgun 12 gauge model 20 pump is values at about $150. It was sold by Sears Roebuck.
what is a. jc Higgins pump shot gun. model 20-12 gauge worth??
When was the J.C. Higgins Model 101.0 12Gauge Shotgun Made
You don't give us the model, so it is hard to answer the question. Assuming the gun does not have an obvious adjustable choke, the choke is probably not easily adjustable. A gunsmith can open the choke (from Full to Modified for example) or can install internal interchangeable choke tubes (costs around $125).
The Winchester 140 12 gauge has a choke barrel at 28". This is the same choke size as the 20 gauge model.
Stevens made jc Higgins shotguns ,the model 311 interchanges with the jc Higgins
No model provided.