bullet: 30 cal flavor no less than 165 and no more than 200gr. That's the bullet, now for the rifle. I already have the ability to shoot 165 gr at 3100 fps accuratly. Want to get past this. Does anybody make a 300 with 30 or so inches of bbl? Is this something that needs to be custom made? Weight and length of rifle are not an issue. Accuracy and speed are. I dont want this for punching paper, this is for hunting the flat lands.