Thank for the suggestions, and I think I still need to work on improving the muscle control on gripping the gun, or rather know how to let it go in a controlled manner, as quoted from a my buddy:" muscle are less consistent so either you learn to control them or just fully relax them". I chose latter, and it had promising result.
I caved in and bought a torque screwdriver set from Princess Auto Store solely because because i enjoy that style of handle instead of the thick line Wheeler and similar model present. I've also picked up a shooting rest, botched together a cheekriser with EVA foam and self-adhesive bandages. I'm now on my route to cooking up a batch of Ed's Red following recipe from Ed, still searching for Lanoline and wonder if I can substitute with Vaseline.
The stock problem is resolved in that now it is free floated (when not fired) and torqued to spec (40in-lb for my axis with polymer stock); and has about 1/32'' of a gap (very tiny, but will let the paper pass through for the classic free float test), and now it shoots a lot better. I've also improved on shooting technique and gathered advice from a fellow range buddy, so the following are results using STV 55gr FMJ Ammunition (Also some blabering: STV seems to group better than the S&B dispite both being Czech ammo and at same weight, but being slightly cheaper at only $.80 per round instead of $1 per round. hmm)
Still there are flyers showing up here and there, but that's due to me rather than due to the gun.
Attached picture is me shooting at 50 yard, with those 2 flyer being the adjusting the scope in the wrong way because guess what, the scope I have on that 223 works the other way around.
Second picture is same gun at 100 yd. sans 1 flyer the rest 4 grouped amazing which means I'm the problem.