I shot the inside of my Impact's moderator, a the least a dozen times, because I drilled and or tapped the 1/2-20 hole crooked in my new carbon sleeve tensioning nut. It obviously took quite a few shots and constant fiddling with the scope (wondering why I wasn't on target) to figure out that I may have an issue somewhere else. In the end I returned the OEM shroud and moderator to the barrel and made a short tension sleeve to work temporarily there. It is not as solid as tensioning the full length carbon tube was, but it is better than floating on buna 70 o-rings coming out of the case.
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