RE: Should I get a 50-60# or 60-70#
If he said he can't hold the concentration how does that relate tohavingthe strength?Sounds to me it's more of a case ofburning himself out on high degree of difficulty shots.
Trying to make high degree of difficulty shots like he does wouldrequire the type of concentration that would burn you out fast if you tried to do it over and over 20-30 times. It doesn't sound likeand issue of his shoulder getting tired
I'd never recommend that anyone shot more than they can handle. I'm just stating that you can't use lack of concetration to mean that a person is tired or overbowed.