I have an AX .25, I don't know why it was discontinued, and then this one brought in. According to the site, the Weston will do 15,900 with an 8-6" APC. That is only a bit better than an FP or good LA .25 which was also discontinued here. At least they are bringing back a .25. A really nice size that is often overlooked. I like the angled back needle valve too. They still use the weak screws holding the carb on instead of the clamp though. I guess they sell more cases that way.