..Poldi anticorro steel...
There has been a recent thread on Krupp barrels.
Raimey/Ellenbrs had an elaborate thread years ago on the Czech Poldi steelworks.
I understand that they went broke recently and were auctioned off twice.
So here are 2 photos of a pair of bars for Poldi anticorro chopperlump barrels
in statu nascendi.
I got them decades ago from a Prague gundealer.
In the old Austrian steel group classification (STL1 to STL7)
it featured in STL 2.
Böhler Rasant/42CrMo4 has been in STL 3, Böhler Super Blitz in STL 7.
This steelgroups defined the minimum allowable thicknesses, an
critical parameter when extending shotgun chamber length from 65 to 70.
..
http://www.jpgbox.com/page/62374
http://www.jpgbox.com/page/62375
....
F.N.
As it is not uncommon that posts on this forum deviate in a nonsense
political dispute/insult, so dont be misled by the rule , it has been a
giveaway into my mailbox at the last election.