You can remove the bolt from a 336 by opening the action and removing the lever pivot screw. Remove the lever and the bolt comes right out. It's been a while since I have done it, so I can't promise you there are no other small parts that come out with the bolt, but if you're careful and p[ay attention, you should have no trouble getting it back together.
Anyway, once the bolt is removed just adjust your scope so that it looks about two inches directly above whatever object it is you are boresighting on. That should get you on paper at 50 yards or so.
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