Barrel bore very off center.(Updated new barrel issues)

[redlined_b16a]

It likes the 30grain barracudas and I pulled a 1/2" ctc at 50 yards.
865 fps average for 51fpe.
I finally like my gun.

[anti-squirrel]

Great hearing your results- a 35-yard one-holer is a keeper, no doubt.  But the bottom line is your gun is shoo9ting up to your expectations now.  a 50-yard 1/2" group is nothing to sneeze at

[K.O.]

Hope it stays that way for ya and does not lead up at the ring to much... If it does you might want to consider fire lapping with paste...(JB bore/tooth(the ones with hydrated silica))

right now... if it aint broke don't fix it..

[redlined_b16a]

To be 100% satisfied Id have to open the transferport to .180"
And try to get more out of the hammer to get 33 grains at 900fps.
850fps is the guns limit.More hammer preload loweres the fps and stops the trigger from working.
I do like its performance with the 30 grain cudas though.
18 shots only use 2800 down to 2100 psi and thats with the extra valve holes plugged and one .165" port hole.
I can shoot 4 mags easily but .........more pumping.

I should have bought a bt65 short instead

[Rocko]

Glad to see Hatsan step up & send you a new barrel.  Since you have a lathe, a 4 jaw chuck sure would come in handy the next time you need it.  I don't use mine very often, but for some jobs, its a must have item.

[redlined_b16a]

As a hobbyist a mini lathe is a must have tool.