I think the best thing about this platform is the 21rd. mags. Max knew this gun would be popular for CO, and designed a tube just for us. And so easy to get to 23 with just a base pad swap. I have 8 21rd. mags with TTI bases, stock guts. I get 23 reloadable in all of them. There is a thread going where guys are only getting 22 reloadable, and I admit the 23rd. round is tight, but with a LULA, it goes in. I have no issues loading it on the clock, and the gun will feed it reliably. YMMV.
Before I got the TTI bases, I used Springers with the Grams guts to get to 23. Those worked for me too. Charmed life I guess.