Perhaps someone can clarify for me.

Since steel shot goes down the barrel in a plastic cup it shouldn't affect the barrel walls. I assume the damage occurs when the cup hits the choke area. Normal lead shot will deform while being compacted to go through the choke whereas steel shot will not compact, therefore bulging the choke area. Do I have this right?

A vintage gun with no choke should have no problems?
Will choke tubes solve the problem?

Also I've heard that some non tox is just as hard as steel, true?

Thanks, Rob

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