I have a Weaver 20 MOA 1 piece base on my Stevens LA. I question whether it is 20 or some far less MOA base. To the naked eye it is fairly flat/level front to back. When measured with calipers there is only .04 difference front to back. Is that 20 MOA? I could spend a week trying to calculate it but was hoping someone had a 1 piece base laying around to confirm. I do have a 20 MOA on my WBY MKV, and you can't see the cant from across the room. Any help would be appreciated.