If you only have 100 rounds through it you are just getting to know your rifle. I shoot poor in the 120deg summers here in vegas. same gun same loads but a nice calm winter day and that 1.5 " group will shrink down to .75 or .5". Or some times it's just plain me. Try some different ammo. I reload and have a great time finding that sweet load for each gun. Loads can make a big difference.