"built" a modified case today for the 6 predator--took me a couple of hours but I got lands/ throat engagement measurements for all the bullet types I have. In retrospect--I should have done this before firing off the first loads above. Wildcat chambers may or may not conform to the range of bullets--I should not have assumed the maximum length that would fit in the magazine, or even the "standard" 2.26 would necessarily chamber without engaging the lands or throat and potentially create a bullet set-back.
That was not a smart thing for me to have done.