The holy grail !!

Went out to the range early this morning to try out some new turkey chokes a customer game me and threw in my air rifle just in case the wind wasn't howling.
A few days ago I put a heavier hammer weight in my FX dreamline and chronographed it in the garage, the velocities went down instead of up, I still don't completely understand how the spring, hammer weight and regulator work together and I don't think anyone else does either except for maybe the Swedes who designed the gun.
Anyways, the spring had to be taken out to put the original hammer weight back in so I used my chronograph to adjust the tension for optimum velocity today.
Only got another 6 fps out of the 13.43gr pellets but 26fps with the 16.2gr jsb pellets.
In previous tests the best groups were with jsb slugs at 50yds, best pellet groups were with the 16.2 gr at 35yds, those became unstable somewhere between 35yds and 50yds and didn't group at all at 912fps.
Adding just a little speed made all the difference at 50yds for both pellets, the gun grouped really well at 50yds outdoors with a 3-5mph wind with both pellets. Somehow in my hurry to get out the door this morning I forgot the JSB 13.43gr slugs but brought some 16.0gr Wildman slugs made in GB. As you can see they didn't stabilize in the 1-18" twist pellet barrel, whenever I get the heavy slug barrel I'll rerun the test with them.
I didn't bring the compressor to the range so could only shoot so many rounds, I wanted to confirm that the groups weren't just luck but was unable to do so, will try and replicate as soon as the weather permits.
These are outstanding groups for a 177 air rifle at 50yds, really close to 1 moa. They're definitely good enough for most of the rodents and pigeons I encounter out to 50yds.