I had a Colt Delta Elite 10mm , the EAA Witness (Tanfoglio) 10mm and a Glock G20c. With full power hand loads (155gr fmj, 800x powder) the Glock got real hard on the hands after 20rds or so. It had a wild flash, very loud, made gongs dance, made a great conversation piece and most just had to try it.
A Bren 10 would be a sweet find
A Bren 10 would be a sweet find