Well.... I resurrect this thread for an update! Took the problem child out and I had...well....more problems.
Set aside the magazines I had marked and loaded up three others with Hunting Shack Ammunition - 124g - PFP (plated flat point) (RL)
. - 42 rounds total and all worked flawlessly. Then I loaded the remaining eight rounds into a mag and topped it off with six rounds of Parabellum Research - 147g - FMJ (value line)(RL)
. And loaded two more mags up with this.
Now I started having failures to feed with every other round again. I tried all magazines with the same result. I believe the remaining Hunting Shack rounds would have worked fine but at this point, it was hopelessly mixed in with the others.
I put all the rest of these aside and tried Federal - 100g - CC BallistiClean
and all 50 rounds ran flawlessly (and they grouped well too - pic below).
I'd say at this point I have a picky eater. I need to find one practice round that works well and one premium round and just stick with them.
By the way, I love PBR(Parabellum Research) ammo. My P229 chewed it up and spit it out without a hitch and my G31 likes it as well!