About 3 years ago, a buddy stopped by my office with a Remington 700 ADL Youth .243, along with a Leupold scope, and wanted me to set it up for him...

I happen to shoot a .243, and he knew I would have plenty of ammo...I don't know where you got the idea the .243 was for youth as I'm 52 (maybe that's a compliment)...Or for smaller hunters, I'm 6ft 5 inches and weigh about 250...

Anyway...I mounted the scope and sighted it in with no problems, even though it was a "youth" model...If your guests have a problem with the length of pull simply add one of those slip on recoil pads to lengthen....

btw...He bought this gun for his 14 year old daughter, he is an '06 man....
After he saw my groups and shot the gun, he used it to kill a nice 10 point...
It sure was funny to see him come by my office with this deer and tell me how effective the .243 was....Now, he used to be an '06 man...