Accuracy improvement with different gas block

[DHumbarger]

Maybe the steel blocks being heavier than the aluminum ones interupt/disrupt the natural barrel harmonics thereby adversely affecting accuracy. I can envision that a gas block located farther out on the barrel might tend to have a greater affect than say a carbine length block. Might be that on a carbine length block steel is ok & on a rifle length block aluminum is the correct one. Just food for thought.