Understand that I am not arguing....im asking. thanks for the advice

Mark, i am certainly no expert in this but my inclination is to not shoot steel through that nice gun. No need to really with all the good non-toxic alternatives today. I would buy some Kent Bismuth and shoot away with no worries. :)

It was really sort of a rhetorical question, since I have been feeding my very early Parker lifter 10 RST Bismuth at $3.00 a copy, it is not the economics.

I agree about tempting fate!

Mark, If I were you I would NOT shoot steel through those barrels!

Winchester Proof Steel is indeed Chrome Moly 4340 or 4130 and was introduced in 1931 for the Model 21 and reported to have a tensile strength of 115,000 - 120,000 psi with an elastic limit of 105,000 psi.

https://books.google.com/books?id=9S...YC&pg=PA57&lpg
The "Violent Proof" (VP) load was reported to be 7 1/2 (long) tons = about 24,000 psi by Burrard's conversion

Steel target loads have a thick shot cup and I would certainly use them in a M21 with no more than an IM choke. Sadly more gun clubs are being forced to convert to non-tox only ie. Naperville (Ill.) Sportsman's Club and some in CA

Good post learned a lot. If I paid Win 21 money I would not be shooting steel threw her. The newer heavy shot would be my choice. I always favor the investment in the gun and what it was built to shoot when made.

I shot steel for several years through a model 21 skeet gun choked WS-1 and WS-2.It patterned IC and IM with steel and was wicked in the timber or over decoys.I would not put steel through any gun with chokes tighter than .020".

Who is Chuck Hawks?

i ve shot steel shot thru my lc smith long range that has modified both barrels it has never hurt the bore on it but with the other set of barrels with full and full choke i would not shoot steel in them...charlie