I am full sizing my cases and am very pleased with my groups at 100yrds. I can cover my groups with a quarter. I am useing 35.3 gr of 4064 and sierra 1365 bullets, 55gr bt soft points and cci primers. If I just reneck will I get tighter groups? This is for my hunting rifle on ground hogs and yotes. Also 3x9 prostaff nikon scope. Thanks all. Dan