My 2 year old Co-Ax uses adjustable jaws for priming. Not the best, kinda hard to get some cases right (45 Colt w/thin, small rims), but with practice it works and on my 30-06 brass it works quite well. Prolly the best press I've used in over 30 years of reloading. I didn't have to wait and I bought mine from Brownell's in Feb. for an even $300.00. Some complain about the shell holder assy. but I really like it; I don't have to shove a case into a slot, just drop it upright and raise the handle. When I'm seating bullets I'll place a case on the shell holder assy., raise the handle to clamp on the case and placing a bullet in the case mouth is easier with the case not wobbling around. Everything I've found that would go in the "con" column is really minor, and mostly just need a small modification of my methods...
Keep shopping, I think the Co-Ax is well worth the wait...