SINCE YOU DID NOT STATE WHAT CALIBRE AMMO YOU ARE USING I WOULD SUGGEST THAT YOU USE A 30:06 180 , 200, OR 220 GRAIN CORELOCK BULLET..... THAT IS ALL I HAVE EVER USED AND HAVE NEVER HAD A PROBLEM OF ANY KIND........ WHEN I AM LOOKING FOR WHITE TAILED ONLY I USE A 150 GRAIN CORELOCK., ROHO