A 243 or 30-30. The 243 for just enough and the 30-30 just because of its history.
Not saying the 30-30 is a hard kicker but I never thought of it as low recoil myself.
Fully agreed.
Part of that stems from the rifles the 30-30 is generally chambered in.
A lot of them were chambered in light lever guns with combs that may result in cheek slap, combined with narrow butts that concentrate recoil, plus many had hard butt plates or the dreaded steel butt plate.
All of those factors combined to generate a flinch in many a young shooter.