I was once criticised by a certain flight commander during an IF training trip for allowing my Puma to descend in the 60 degree bank turn that he told to me to maintain. He wasn’t very experienced on type as an IF safety pilot. I pointed out that we were at maximum allowable collective pitch and the aircraft simply couldn’t maintain level flight at that angle of bank so to maintain the airspeed he wanted, it could only descend, bearing in mind that he told me to maintain 120 kts. As a safety pilot myself (and then later a QHI on type) I never expected any pilot to use more than 45 degrees of bank for practicing steep turns.