Thread: Winchester xpr bases help

Have a winchester xpr 7mm rem mag with 2 piece weaver bases and leupold high rings with an element 6-24
The problem we are having is we don't have enough up elevation to zero its maxed out and at 50m is about 250mm to low still, we've changed the bases around thinking we had them backwards but still didn't fix it, bases and rings are new
Shimming the rear base was the next thought are there any others I'm missing
Thanks team