I have been led to believe high performance steel is for fluer dy lys stamped guns only.Steel shot is the biggest issue, it almost certainly won’t have a steel proof. At least a couple of the shoots around me are saying non lead only next season.
Having said that there is one team on the shoot I pick up for that will only use side by sides.
Friend of mine is trying to get me to use his OU 28 bore. Says I will love it. I’ve been resisting and have probably had my best season ever with my Aya 2.Gun values go up and down depending on what the current fashion is.
Once upon a time, if you turned up at a shoot with an under-and-over, you didn’t get invited again.
Then there are antique guns and the dilemma as to whether you still use it or not.
IMO if you can shoot reasonable well with it, why not? Even if it is 125 years old and a reasonable good, sort after brand!