At the end of the outbound leg in the hold or sector entry, a quick glance at the tail of the ADF needle (or bearing pointer if you have one) will tell you roughly how the inbound turn is going to go. If it's showing about 30 deg offset from the inbound track you'll have no trouble, but if it's less than that, you'll need to steepen up the turn a bit to avoid overshooting. For this reason, the teardrop/sector 2 entry is brilliant because it'll always be 30 degrees.