Q fix 6.5

Hello All I have a Q fix 6.5 with a Schmidt and bender 5-25 proof barrel 22". Reptillia AUS mount 39mm height. I zero my rifle at 100 yards than set the zero stop. I only have 15 mills of elevation till I'm bottomed out. Is this what it is with this scope mount or am I missing something?. Should I have more elevation to use before the turret stops turning?