If you want to shoot commercial ammo and still have an intact rifle get one these, an adjustable gas plug. I have these on all mine, it will save you from a lot of damage later on. I set them so I only have enough pressure to cycle the rifle. Start with the largest port first and work your way down. You may have to change setting to get Greek .06 to cycle after shooting the commercial stuff. As someone else said, you can bend operating rods, and that would be the least damage. You can also shear the rear legs off the action, then it's a piece of scrap metal.

The part is about half way down the page:

http://www.fulton-armory.com/MParts.htm
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