When I was a teen ager I worked at Lion Country in West Palm Beach Florida during the summer and my uncles and cousins worked there also and owned many many rifles with recoil and I shot them all and never had a problem.458's,416 Rigby.416 Taylor 460 Weatherby Mag and some I can't recall and never had a flinched,except the 460 maybe.375 H&H were candy.I played football as a defensive end and set a record on bench press.I'm not tall but wide in shoulders,narrow in the hips.Florida State gave me a letter of intent to sign but I wanted a full ride,even Alabama would not give a full ride so I didn't go to college.
Point is I have taken some hard kickers and never developed a flinch!Losing weight must have put me in a whole new place,plus I got a little older,will hit 71 soon.