I’m shooting Maxxtech 115g ammo, which powerful ammo would you suggest? Yes I cleaned and lubed my CZ according to CZ’s instructions, using shooters lube. It is so tight, so I’m sure the more I shoot the looser it will get. Right now I will get one round stuck between the factory mag and the barrel, ( it varies, could be the second shot or the 15th shot ) so I have to hit the mag release button…drop the mag and hand cycle the slide to get the cartridge to come out. Then reinsert the mag and it cycles properly for the remainder of the 20 rd mag. In no way am I limp wristing it, just a little disappointed that this is happening on a $2,000 dollar handgun. When it does shoot properly it is by far the most accurate handgun I’ve ever shot.