RE: Primers/accuracy?
In my observation I would say no. And changing primers will not make a poorly shooting gun suddenly shoot sub MOA. To minimized my inventory I have favorites for several different chamberings. For the most part I use CCI BRs....many years ago when I started handloading that was all that was availible. I kinda stuck with them for most things. But I also use Fed Gold Medals, Remington small pistol