Jamie is correct, but it sounds to me as though you havent actually shot the gun.
Id personaly be doing that in order to confirm where your zero would need to be.
Meaning it might be you would need a 200 yd zero instead of 100 with that base.
It really makes no difference where zero is unless you want to do most of your shooting at
100 yds or less. Even then you could hold low using the reticle. For longer shooting the base you have would help.
For about $40 you can buy a zero taper base from EGW and keep the one you have for future use if needed.