Suggestions to get rear axle nut lined up with cotter key hole

[OL JENNY]

I have changed an axle and am using a good original castle nut. My problem is that from a torque range of 90 to 125 it does not line up with the axle key hole. I do not have another nut to try and I am going to call Bert's this morning as some have said another nut may line up differently. At 125 it is close, but not close enough. My hubs are 3 year old cast iron hubs from Snyder's.