I have a Compact and a CDP, both series I, and they do shoot great. In fact the CDP is my carry gun. But, it does not like all ammo - I bought 100 Rem. Golden Sabres to run through the CDP and it did not like tham at all! I got tired of having to rack the slide every round, so I'll have to find different carry ammo. Guess I'll buy some Hydrashok!