Welcome to Marlin Owners, and I bet you'd get more responses to this if you posted it up in the 336 section. It's sort of buried in a less-visited part of the forum here.
That aside, I've had good results with the Weaver base, which is very simple and inexpensive, and can be used with Quick Release rings.
I've also had good results with the Leupold "STD" base. No problems at all, even on a hard-kicking .45/70 Marlin.
For scopes, I've got a decided prejudice towards Leupold, but either of the two you've mentioned should do fine. Vortex seems to be gaining a good reputation quickly. My favorite lever-gun scope is the small 2.5x Leupold Ultralight. Excellent field of view, excellent eye relief and at only 8 ounces it doesn't throw off the balance of the rifle.
Regards, Guy
That aside, I've had good results with the Weaver base, which is very simple and inexpensive, and can be used with Quick Release rings.
I've also had good results with the Leupold "STD" base. No problems at all, even on a hard-kicking .45/70 Marlin.
For scopes, I've got a decided prejudice towards Leupold, but either of the two you've mentioned should do fine. Vortex seems to be gaining a good reputation quickly. My favorite lever-gun scope is the small 2.5x Leupold Ultralight. Excellent field of view, excellent eye relief and at only 8 ounces it doesn't throw off the balance of the rifle.
Regards, Guy