Having started off on the Vigilant (Grob 109) we were taught turnbacks but they were:
A. planned out for each runway and shown during briefing- 2 runways so four directions that were:
B. graded specifically on height and wind speed direction at the point of EFATO e.g. minimum 300' still air, min 500' wind above 10 knots.
C. as an FSC I was once made to carry through a practice turnback and land in a light tailwind to show it is tricky.
D. captain's discretion - you were not expected to slavishly follow them if it was gusty for example.
E. I'll have a look but the FRC's refer to using the MINIMUM angle of bank to minimise height loss something like 10-15*.
F. I found it very hard not to perform an immediate turnback when I started on the PA28 - those drills were still a sharp instinct 8 years on!
G. Feather the Prop in the subsequent actions.