1: When people shoot sub-moa groups using Win209a and Federal 209s, the argument becomes sort of irrelevant.
2: Conventional wisdom is for maximum accuracy use the ignition source with the least energy that still positively ignites the charge. Doing so is supposed to help eliminate the occasional, and unexplainable, fliers.
3: See item 1.
and don't you mean #11 caps. #10 caps are generally for pistols.