Snappo
6.5 Creedmoor
Oh!... but how much cant can a base have? More than 20moa would be rare and it actually should work for You adding to the elevation range of the scope by borrowing from the cant.
So I dont get why you are not able to zero and have plenty of adjustment left.
Nikkon are nice but the bdc have coarse reticle.
It's gotta be a 20 MOA base. I don't think I have ever bought anything but flat's and 20 MOAs. My crosshair was 1.5" above the bullet impact at 100 yards when I ran out of dope. So that mean's the scope must be 40 MOA's. I tried to google how many MOA's were on the scope, but apparently there is no such thing as a Pentax LightSeeker 30 8-32 anymore.
I had another of the Pentax LightSeeker 30's do that same thing, but with windage. I ran out of dope about 2" from zero on windage. I took the Pentax off and put on a Leupold, and the rifle zeroed for windage just perfectly. So I have 2 in boxes now; and I think the third might be sitting on a 22 Marlin bolt action (though I am operating from memory - I have a bunch of rifles).
I don't much like that Nikon recticle but here is what I do: I go out to my range and shoot at 100, 200, 300, 400 and 500. I have shot-record books, and I figure out what my dope is on every rifle/scope/bullet combination and when I get back to the house I poke my data into a spreadsheet I keep. Then I push my spreadsheet to my Samsung Tablet-4; which is 8" and somewhat readable down back. For hunting I really just use one rifle, and that's my Remington 700 Police with the 20" bull barrel and a Springfield Government on top. That zeroes at 200, and each mark is a 100 yard increment. Really easy to do, and I only hunt my property so I have distances very memorized. Hunting truly is a time where you don't want to have to mess with a home made ballistic chart. You just want to know your distances and take a good shot without a lot of thinking.