Would you reccomend using the Gamo precision combo's with this gun ?
Do you mean pellets? I would recommend JSB pellets.
Is the power adjustable down the line?
You would be able to make hammer spring tension adjustments, sure. Regulator adjustments would require someone with a tester and experience in working on HW regs. Really depends on what you are trying to achieve.
Does the muzzle break screw off for an aftermarket moderator?
Yes it is remove-able
where could i get the schematic diagram of weirauch HW110ts
Is this the model with the synthetic breech? Are there any baffles in the muzzle brake. If not can They be retrofitted?
The muzzle brake is not baffled.
Does this gun (in the FAC version) come with a threaded silencer?
No, the muzzle brake shown is what it comes with.
With this gun shooting the barracuda match 21 grain pellets what's the best head size? Those pellets are available in a few different head sizes.
I would recommend starting with 5.52, but in all honesty, the only way to know is to test them all
can this gun be shipped to Canada & if so will it include the silencer
It cannot be shipped.
Is it ok to leave the gun at full charge for a short period of time.
Yes, of course
Any idea when we will see a video reviewing the performance of the rifle?
There are a few from overseas. Might be a bit to see one here in the US.
Do you have any data on recommended pellets and FPE measurements?
JSB's are most likely going to perform the best
Is this gun regulated? I saw a video of one that was reviewed in Europe and he said it was not regulated...
Yes, it is regulated
Shots per fill?