Eddie,
Your 870 might survive shooting steel through a full choke but I would not subject one of my doubles to it. A Full choke being a constriction of .030". As your 870 is a 3.5" gun the full choke that came with it might not be anywhere near .030" but would still deliver a full choke pattern using steel shot.

Steel shot doesn't squeeze very easily and after a while something will give. A barrel may just bulge or split.

Last edited by MarkOue; 01/08/08 11:10 AM.
USMC Retired