My nearest Smallbore Lever Action matches are over 4 hours away. I have a "traditional" NRA smallbore silhouette match about and hour away.

Question:
Can I use a SCOPED lever action .22 in a traditional (1/5 scale) smallbore silhouette match?

Yes. Assuming it meets the weight and stock dimension requirements and there would be no reason it wouldn’t. When you switch back to lever-action you will be well practiced.

What 375 said, plus trigger pull weight. If your trigger is less than 2lbs you could only shoot in the standard class.