Spuhr scope base/scope picatinny rail

I use one on my .338LM and my .50BMG. They are heavy duty. Very easy to level a scope when mounting it in the rings with the supplied v-insert tool. You can get them in different diameters, and with different cants too. If you are moving your scope between rifles, the Spuhr mount makes this a breeze. The only thing I don't like is that silly levelling bubble on the rear. It is too small and in the wrong place. If you do use it to check your level, you need to break your cheek weld to see it.

I would recommend one.
 
I use one on my .338LM and my .50BMG. They are heavy duty. Very easy to level a scope when mounting it in the rings with the supplied v-insert tool. You can get them in different diameters, and with different cants too. If you are moving your scope between rifles, the Spuhr mount makes this a breeze. The only thing I don't like is that silly levelling bubble on the rear. It is too small and in the wrong place. If you do use it to check your level, you need to break your cheek weld to see it.

I would recommend one.
i think hes talking rails for a 700/tikka not the ISMS mounting system