When the rifle was introduced, I thought, cool I can choose the barrel based on the desired caliber of the current situation. But now I'm wondering if i'd keep it dialed in to .25 & pick up another rifle if I want to shoot .22. How have you been using yours?
Fx Impact owners, how often do you swap the barrel?
- Thread starter bokes
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it is not possible to swap barrels alone, without doing any other additional adjustments.
if you have the reg setup to .25 you will have to lower the reg too.
if you have the reg setup to .25 you will have to lower the reg too.
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I only have one barrel on my impact so can't speak from experience. However I thought you were right. Each barrel calibre has a different size transfer port which I presume let's more or less air through depending on calibre. For example, a .25 barrel might be shooting at 50 ft/lbs but putting on a .177 barrel with a smaller transfer port will reduce the energy to sensible power levels for that calibre without making further adjustment. Some adjustment can then be made through the power wheel with its repeatable settings.
Would need to make scope adjustments between calibres.
Would need to make scope adjustments between calibres.
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the larger is the caliber change, the more adjustments you will have to make on the reg.
or why would be the adjustments be there if it there were not needed? come on.
people you better get that major tuning guide out there, or people after a year or two are just guessing what to do.
i cant believe that no instructions set comes with these guns.
the transferport sizes change, for effciency and many other considerations, like for the fps can be kept maintained as you go up the caliber size, on the other hand it cant stay the same large or the small pellets would drop into it it that makes sense. LOL
or why would be the adjustments be there if it there were not needed? come on.
people you better get that major tuning guide out there, or people after a year or two are just guessing what to do.
i cant believe that no instructions set comes with these guns.
the transferport sizes change, for effciency and many other considerations, like for the fps can be kept maintained as you go up the caliber size, on the other hand it cant stay the same large or the small pellets would drop into it it that makes sense. LOL
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I bought a .22 barrel when I purchased my Impact, then I bought a .25 barrel ... basically I wanted to see which one would shoot better at 100 yards. The .25 won hands down, plus I didn't have to mess with that darn telescoping shroud. It is something of a PIA to have to re-zero the scope when I change calibers as well as other settings like the power wheel and the valve screw ... and now they are coming out with barrel liners with different twist rates. Yeah, it is fun to experiment with all the different variables, but there comes a time when you have to sit back and ask yourself if shaving an additional .5 mm off group sizes is worth a new barrel and liner and can I shoot well enough to take advantage of that .5 mm. So I guess your answer would be that I very seldom change calibers anymore, but it is there should I need it.
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Theoretically you can keep the regulator set high & use it for all calibers. Mine was set at about 150 bar for .25 and. 30 and I had no problem shooting the. 22 with the same reg pressure. You just need to decrease the valve and hammer spring. But if you're looking to squeeze the most efficiency & accuracy out of the .22 you should decrease the regulator pressure to make everything run smoother.
If you plan on swapping calibers regularly I'd just leave the regulator alone (high). Then all you have to do is swap out the barrel & probe, then adjust the valve, hammer spring, & scope turrets. Which should come pretty easily after you notate the settings.
If you plan on swapping calibers regularly I'd just leave the regulator alone (high). Then all you have to do is swap out the barrel & probe, then adjust the valve, hammer spring, & scope turrets. Which should come pretty easily after you notate the settings.
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I've swapped my barrel exactly once. I originally got the .22 and swapped it out when I got the. 25 kit. Haven't touched it again since.
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I have a .22 and a .30. I mostly shoot the .30 but do occasionally swap it out for the .22. I've set it up so that with the power wheel set at 5 or it shoots the 44.75 grain pellets at about 840fps. If I swap the .22 barrel in I turn it down to 1 on the power wheel and the 18 grain JSB pellets fly at about 880fps. Both are super accurate. It works great.
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