Elias,

I had a stock crack on my CZ550 in 416 Rigby after only 12 rounds. I had properly tightened all screws.

I talked to the US warranty repairman, and he said to glass the actions before shooting the heavy magnum 550s at all. At least he was being honest.

I galssed the new stock they installed as soon as I got the gun back and have had no trouble since. I've put about 200 rounds through the CZ with no problems...now that it is glassed.

By the way, the CZ shoots a much tighter group than my Ruger RSM 416...maybe due to the fine set trigger.

luv2