Pretty simple question if you start with a decent quality scope say a Leupold os there any practical disadvantage to a 20mm obj for a hunting rifle?
Thanks Hank
My opinion, any practical limitations of a 20mm objective would be a result of your personal preference for magnification. My personal preference is for low power magnification when using such a scope. For medium and big game, I rarely use more than 2.5-3x out to several hundred yards. A 20mm objective provides an ample exit pupil for my satisfaction at low power. But, if you are someone who prefers higher powers, especially if you are someone who prefers higher power settings in low light, you may find a shortage of exit pupil at those higher magnifications compared to having a larger objective.
So for me, I don't feel shorted when hunting big game with a 20mm obj. For you or someone else, I cannot say.
Best