Is a zero reset the same as a zero stop?
No, toolless zero reset is a different feature than zero stop. I can’t remember which, but it DOES seem like one of the Vortex Strike Eagle, Venom, or Diamondback Tactical doesn’t have a zero stop…
Is the Christmas tree preferred over the graduated reticle?
I like trees on all of my scopes, BUT 22LR can be an instance where a simple graduated reticle can work ok - there’s not much splash for 22LR misses, so I can understand logic where guys might prefer more open glass to be able to see miss-splash better. For example, I bought a Mil-C graduated reticle for my ELR rifle instead of a Mil-XT, so I could see splash easier. With centerfire PRS rifles, no question for me, 110% Christmas tree, and for ME, since my centerfires are trees, I want trees in my rimfires too. In general, a tree gives you more options and more info - so if you get tight on time, you can start holding in the reticle and dialing, and NOT be stuck holding in open glass. So for me, I want trees.
If I can't find one I can get 20moa rings,
Burris XTR Signature rings - pick up a BUNCH of angle if you want, with the versatility that you get multiple inserts to pick 5, 10, 15, 20, 25, 30, or 40moa. They offer these in 30 and 34mm. They may have them in 1”, I just don’t have any - but they do offer their Signature Zee rings in 1”, with the same options for insert angles (but to get 40moa, you have to buy a second set of inserts - but these rings are super affordable - like $50).
Would a 34mm tube be better than a 30mm?
In general, 34mm will have more elevation capacity, but it’s not guaranteed. Otherwise, eh, not really. A 34mm tube is stiffer and sturdier, and there’s some discussion that squeezing the light through a smaller erector tube (50 or 56mm of FOV being squeezed through a smaller tube = more light manipulation, potentially larger circle of confusion in the lens), but eh… all of my centerfire competition scopes are 34 or 35mm, my Rimfire scopes are both 30mm, I don’t overthink it.
Any suggestions on where to locate these programs?
If you’re mil/LEO, first responder, NRA life member, RMEF, firearms instructor, etc (or allegedly, good friends with any of the above), you can get access to these programs.