I am lifting weights, and I get close to the fence but never over. Brad, being able to hit the long ball is a desire most share. Physical maturity will bring more distance also. If you are a good contact hitter, I hesitate to make many changes in your swing.
Most hitters can gain more distance by proper mechanics.
Make certain the bat stays in the hitting zone as long as possible. The finish should be out front and fairly high. Do not sacrifice contact to gain a few extra feet. Do not try to yank every pitch, but try to use the entire field. Consult our baseball experts for an answer.