All five of my cans are screw on and not QD, each of them had a POI shift of a few inches due to barrel harmonics changes with the cans on.
However, once I targeted them all in with the cans installed, they all shoot MOA with zero hassles, but I do not take them off except to clean out the barrel.
Many like the convenience and utility of a QD can to install on numerous rifles, I stick with a dedicated can on each of my rifles purely for the sake of precision and not having to re-target them.
