I think you'll find that the ammo is at fault, not the rifle. I have shot Winchester, Remington, Black hills and handloads through mine, very succesfully. It did not like the FMJ's I tried. If you want to find how it'll shoot while waiting for your dies to arrive, try some decent ammo, Black Hills or Hornady Tap. I only shoot handloaded through mine now, but sub half inch is really easy to acheive. I settled on 55gr Sierra's in mine and they really shoot lights out.