Hatsan AT44 accuracy - pellets spiraling

[GoneShootn]

It is real hard to say what the problem is, I would try the .25 Kings at 880fps and the .177 I would drop down to 850 using the 10gr pellets..When you get a chance see what it does without the LDC, but I do not thing it is the LDC seeing that the holes are super big for a .177 Has to br barrel related...see if the oring is there at the end of the barrel at the breech end.

I just went through the same problem with my .177 S510 the LDC (not yours) was made for a .25 the S510 is a single hole rifle out past 25 yards when I installed the LDC I could not predict where the pellet was going at 10 yards. I found lead shavings inside the LDC . A little judicious work with a rat tail file and problem was solved. The S510 is fairly quiet even without the shroud so no problem for me to shoot it in my basement. Long winded way of saying try looking inside the LDC after it is removed from the rifle and see if any shavings shake out also look in side the bore of the LDC for evidence of damage from the pellets

Made for a .25 and still clipping? Goodness.

[Sfttailrdr46]

It is real hard to say what the problem is, I would try the .25 Kings at 880fps and the .177 I would drop down to 850 using the 10gr pellets..When you get a chance see what it does without the LDC, but I do not thing it is the LDC seeing that the holes are super big for a .177 Has to br barrel related...see if the oring is there at the end of the barrel at the breech end.

I just went through the same problem with my .177 S510 the LDC (not yours) was made for a .25 the S510 is a single hole rifle out past 25 yards when I installed the LDC I could not predict where the pellet was going at 10 yards. I found lead shavings inside the LDC . A little judicious work with a rat tail file and problem was solved. The S510 is fairly quiet even without the shroud so no problem for me to shoot it in my basement. Long winded way of saying try looking inside the LDC after it is removed from the rifle and see if any shavings shake out also look in side the bore of the LDC for evidence of damage from the pellets

we are still looking at very tight tolerances over an extended length and a couple of areas where small errors can be additive and so anything can and does go wrong at times unless the builder has the rifle to match up to the LDC and test fire for proper alignment on the rifle

Made for a .25 and still clipping? Goodness.

[GoneShootn]

Turned out I never got a sampler for the .25. Instead, I bought JSB Kings, Benjamin Domes, H&N Barracudas, and Beeman Kodiaks (look the same as Barracudas), because most rifles seem to shoot one of these well. So I just ordered a bunch more pellets for the .25. In the meantime, I am going to video the bolt probe lift issue and will post it here for opinions. Looks to be about 1 mm of travel, but I haven't yet measured. I don't mind spending the time, spending the money, and doing the work so long as there is progress, but, as yet, there has been little. At least now, however, I know it is the rifles and not the scopes or me. We'll see how the new pellets do. Here are the ones I ordered:

* H&N Field Target Trophy 21.06 gr
* H&N Spitzkugel 24.85 gr
* JSB Predator 26.00 gr
* H&N Silver Point 24.38 gr
* JSB Heavy MKII 33.95 gr
* H&N Excite Coppa-Spitzkugel Pellets 24.54 gr

Thanks to all for the help.