It wouldn't hurt to get a hold of Talley - they are great and will get back to you if you email (or give them a call).
They do provide "general guidelines" on the Q/A but that doesn't apply every time.
I mounted a 2-10X42 Burris Veracity, so by the (chart) I should have been able to get away with 30 mm lightweight low rings but glad I emailed. The tech guy told me to go with medium rings because of 1) the outer dimensions of the bell on the Eyepiece end and 2) because I had a 90 degree bolt lift - said the bolt would interfere with the bell if I used low rings.
Sure enough, with that particular scope and with that bolt lift the bolt handle comes within a hair of touching the bell - if the rifle had a 60 degree bolt then low rings would have worked fine, but not in my "particular case".
They seem to be pretty knowledgeable (or have a decent database of scope dimensions etc) as to what will fit what. Not such a big deal if you are buying your mounts locally, but in my case, where I have to order them in, don't always have the luxury of trying something and returning it in case of improper fit.