*The discussion of the creation, fabrication, or modification of airgun moderators is prohibited. The discussion of any "adapters" used to convert an airgun moderator to a firearm silencer will result in immediate termination of the account.*
How about a picture? Never heard of a "chipped" moderator. I do have a DonnyFL which I hung on a shroud once. It took a very hard hit but no "chips" happened. There was damage to the crown, very slight and the thing still shoots just fine.
See if Donny can get you a new end cap, maybe one caliber up in size. Personally, I've never had a clipping issue with his mods and I've owned 5. Even my 22/25 doesn't clip with 34 grain or 31 Cudas.