Yet again one of the "old school" guys resorts to trying to belittle someone that they do not agree with. It's become so common it's no wonder that people stop coming onto this forum or only show-up during hunting season.

You still haven't explained how the guy saying he looses concetration after a few shots equates to him beign tired after a feew shots. Have you ever really concentrated on anything that hard that requires a great deal of concetration and soon realize that after a few attempts you need a break? Apply that to what he's doing and then you'll understand.