I had on brand new that would drop 5 1/2" at 25 yards when it got warm! did it with both barrels! Sent it back to cz, they called me and said they couln't fix it! So they found me another one and sent it to me. That one was just now a very good shooter. I retuned it and they gave me all of my money back. CZ guns are awesome I have 3, a shodow 2, two TS 2s an orange and a green ( super accurate and reliable) but the checkmate was just soooo dissapointing to me.