Polychokes made prior to 1954 ( I could be wrong on that date) can not be recommended for steel shot. The reason is they did not know the metallurgy of the steel used in the polychoke|
Polychokes made after 1954 could be used with steel shot
Here's how you tell the difference between a pre and post 1954 choke
If the choke tube is knurled, at the end, it is a post 54 choke and OK for steel shot
pre 54 chokes will have vertical lines or (groves) at the end of the choke.
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