To answer the first question. No, my ears weren't ringing at all. I pulled the flaps down on my hat just before the shot. I hardly heard a thing. A lot of people think that a 300 gr load would be brutal but to me it actually kicks less than the 240's. My setup is a Leupold 4X with Weigand base and Burris Zee Rings. I get about 2 1/2 inche groups at 100 yards with factory Hornady Custom ammo.