Well as it happens I had no steel shot I ended up using hardened No.4(?) lead shot, works like a charm and thanks to advice from @Hindquarters the action is all back together and seems to function.
A general thanks to all that assisted with suggestions
PS- don’t have your right thumb anywhere near the ejection port when jiggling the cocking handle into place and it doesn’t hold and you’re on blood thinners..
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