*%&$#@!

I can't get my Norinco M14 to shoot straight.  I've got the Bushnell Elite Tactical 5-15 x 40mm mounted with Weaver Tactical rings on an M14.ca CASM Gen 1 mount.  The optic is visually canted to the left and with the windage cranked to the max, this is the best I could to at 200 meters.  The bullet lands on the mildot fiurthest right when I aim for centre of the target sheet, scope set on maximum magnification.

The only solution I can think of is to shim the rings, or file and shim the mount.  I was told the bigger problem
could be that my receiver isn't straight in relation to the barrel.....no idea what I'm going to do.