CAN'T stop the CANT!!!!!!!!! help?

[supersonic]

I've had a hard time w/ reticle cant when mounting glass - I get it level, then - sometime during the torque-down process - the scope goes "just a little-but NOTICEABLE" out of alignment. Any tips/tricks from the experts out there? I'm doing a 1" Burris FFII on a Rem700 w/ Leupold 1913 2-piece base & PRW rings.
Thanks,
S.S.:43:

[BigMac]

Thats the key, tighten evenly on both sides.

I use the center line in the stock as my guide.

[rksimple]

If your scope has a flat spot on the bottom, by the turrets, try this method:

http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Board=19&Number=248971&Searchpage=2&Main=23141&Words=feeler+gauges&topic=0&Search=true#Post248971

Its worked for me.