Well.....
Stripped, cleaned and re assembled.
11.5m indoor range 10 shot group and I completely covered it with a 2p piece!
2nd group slightly tighter but had one low flyer.
Shot outside at a fence post about 4 inches wide at 34 paces freestanding and aiming just at the top 6 inches above the top wire, hit 5 out of 5
The rifle is now shooting exactly as I hoped it would and this with the Bulldog .3g bb's. Be interesting when the Madbull snipers arrive.
When I removed the hop chamber the bucking looked twisted or not on fully on the one side or skewed a little if you like and I thought after that the nub was lined up with one of the flat sides of the barrel tho not definite about that, but I could not see anything else.
Thanks for the input guys next task... upgrade it!