Sorry:
I was referring to a 9x 25. Seems to pack a punch from the info I've seem. No personal experience. LoneWolf makes barrels for Glocks for this round
An Interesting ctg. For about a month It had some minor vogue for IPSC unlimited. Supposedly with n efficent compesator it would give negative muzzle flip, ie drive muzzle downwards upon firing.
Mike Dillon designed it with. Short neck to maximize powder capacity with 115 gr bullets to maximize compensator effect for competion. If you could find bullets with proper nose shape, bearing surface , and seating depth it would be an interesting thing to try with 147-158gr for field shooting and hunting.
Oh , and the dies are expensive.
If I already had a G20 , I would be tempted to indulge my intrest is off beat ctgs with a Lone Wolf bbl. But as a practicl matter .357SIG , 9x23 , or .38Super would be more practicle way to explore medium bore magnum velocities in an autoloader.