Two months later...
Still no joy with this "4198 similar" powder. Although I have not tried the heavier bullets yet, and really have not experimented much further with it. SO many social engagements, so little time...
I have had good success with IMR4064, TAC, CFE223 in all three of my AR guns - NONE of them like the "similar 4198" so far.
on the brighter side....Built my "new" .223 Wylde AR. Ohhhh she butter! shoots very well. Very happy with it so far. 18" stainless steel barrel, PSA upper, Nickel Boron BCG, Aero lower, Hiperfire EDT sharp shooter trigger, M-lok narrow handguard, Hogue overmold stock, Hogue grip, Strike Ind. extend latch (needed with the optic), Vortex Strike Eagle 1-8x24, cheap UTG bipod (much better than expected)
This was a BUDGET target rifle with everything purchased "on sale" and I am very happy with the results on this budget. Less than $1k even with all the upgrades(minus the optic). I'd call this a mid-grade quality rifle on a budget build.
Also, I have found I very much like the Armaspec stealth recoil spring. I tried it for one gun and now have it in two 5.56 AR-15 guns and my "AR-47"- an AR platform 7.62x39. The stealth spring definitely eliminates that twang.
And with all my recent building and reloading, my wife and family now considers me a "gun nut", so ....do I get a badge or an award for that somewhere? Or just on a government watch list?