I'll be giving UA a call today. Maybe they will give me a "Deal" on a new regulator. Regarding the tuning. I did more research into the "how and what" and tuning appears easy enough albeit a little time consuming. One thing that's not going to work is that the velocities are all over the place. I am not able to get consistent minimal velocity increases (or decreases) to make such an attempt. It's a frustrating mess. one shot will be 870 and without any adjustment the next will be 930, then a third will be 910. I think actual "Proper" tuning will be impossible till this regulator gets fixed or replaced.
One other Newbie question. Once the rifle is tuned, will it need to be re-tuned for each different pell weight? Logic tells me yes considering needed air volume change to move a heavier/lighter pell down the barrel, but I'm not so sure.
Thanks again for all the input and advice. Its priceless info.
btw. I did purchase a tin of the HN baracudas 21gn pells. The rifle didn't like them, however, that was also before I discovered this current issue which most likely was a contributing factor.