Yes, operator error IS the problem in ALL circumstances IMO.

Sort of...

Some action designs are more likely to contribute to or encourage operator error than others. That is actually the point with most of these feeding issues. For example, I shoot my .223 or another rifle just about daily from April on till August-something {varmint season}. In the loading and unloading process {while moving stations} is where I see these issues arise {or try to make them occur out of curiousity} in my situation and that makes me wonder about potential for a fellow to screw the pooch in a more serious situation.

I personally cannot remember a situation where I had a double feed while hunting deer or other larger game since IIRC I haven't needed to work the bolt in a fashion that would cause such an event to occur. But I can imagine it could, as in the case of a fellow changing solids to softs, or some such while stalking.

I am out and about nearly every day of the year with a rifle in my hand on my morning hikes, at my range, when chasing {too often unsuccessfully!!

} a stock-killer or actually hunting something worthwhile. Naturally, I suppose out of 300+ days a year in the woods with a rifle, I experience more loading/unloading or mechanical issues than fellows who hunt the normal seasons and then lean the shooting iron in the gun safe till next year.

I'm just passing on the "theories" I've read, have experienced myself, or when trying to make them happen, have seen occur.

When I try to make malfunctions occur, I find the push feeds more likely to cause problems than the Mauser CF type.