Edit: here is the only difference I can see with the 380mm. the nut is not all flush.
fx crown .177, 600mm STX superlite dud.
- Thread starter PappiPT
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Edit: here is the only difference I can see with the 380mm. the nut is not all flush.
I agree with Acruz - try indexing the liner and you may find you get POI much improved in relation to your optically zeroed scope.
How are the groups it's shooting? I'd only really consider it a dud if it is performing poorly in that sense.
How are the groups it's shooting? I'd only really consider it a dud if it is performing poorly in that sense.
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How are the groups it's shooting? I'd only really consider it a dud if it is performing poorly in that sense.
So I got it, cleaned it, Shot about 100 rounds. I was very pleased. finally I got the 16gr up to speed( wich I couldn't with the 380mm) Groups were ok I guess, for a new barrel. (shot a fly at 25 yrds
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I had a 700mm liner that was a bit tweaked that caused pellets clipping my moderator.
I made a set of rollers and used an indicator to measure the high spots. It doesn’t take much pressure to bend the liner a little. After I get my liners straightened a bit (they don’t need to be perfect) I index and mark them so they always go in with the high side to the top if that makes sense.
When you get it right you’ll see it really minimizes sideways drift when you stretch from 25,50,75...
In my opinion for good long range accuracy indexing your liners is an absolute must.
Check out Ernest straightening out a barrel.
https://youtu.be/9HzEnQML3gM
I made a set of rollers and used an indicator to measure the high spots. It doesn’t take much pressure to bend the liner a little. After I get my liners straightened a bit (they don’t need to be perfect) I index and mark them so they always go in with the high side to the top if that makes sense.
When you get it right you’ll see it really minimizes sideways drift when you stretch from 25,50,75...
In my opinion for good long range accuracy indexing your liners is an absolute must.
Check out Ernest straightening out a barrel.
https://youtu.be/9HzEnQML3gM
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PappiPt not the washers. This is how I index the barrel sleeve. On my Impact I remove the shroud, on the sleeve, at the twelve o'clock position make a mark with a sharpy or other marker. loosen the barrel lock down screw and rotate the sleeve clockwise to the 2 o'clock position. Put it all together and take five shots. record the group. Then move the sleeve to the 4 o'clock position and take another five shots and record the group. And just keep rotating the sleeve and recording the groups. When you get back to 12 o'clock position see where the best group is at and rotate the sleeve to that position. Then it's a matter of finding the proper tune for whatever you are going to shoot.
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Thanks, I'll keep that as a last solution. Paying almost 300 quid for a new barrel, and then having to straighten it is a bit scary on my part! I'll check with the shop first. I got 7 days to sendt it back.
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Yes, so you want to mark the liner at its 12 o clock position, then rotate the liner itself, leaving everything else unchanged and see how point of impact shifts as you do. Hopefully at a certain degree of rotation, say with the liner rotated to 4 o'clock as an arbitrary example, poi will line up more closely/acceptably with your scopes line of sight. If it doesn't work, or swings way out the other way consider moving on to srtmats solution
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I made a set of rollers
https://youtu.be/9HzEnQML3gM
I raided the kids legoboks, lets see what we'll get.
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Stand the gun upright and tighten the four barrel screws, shoot the gun and then loosen the screws, tighten front to back in the opposite direction to the error, this usually removes upto 3 mils of error.
Any more then work on indexing, rotating the liner clockwise to correct to the left and AC to correct to the right.
Any more then work on indexing, rotating the liner clockwise to correct to the left and AC to correct to the right.
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I made a set of rollers
https://youtu.be/9HzEnQML3gM
I raided the kids legoboks, lets see what we'll get.
Yeah, as expected: lego doesn't have the precision and strength for it to work.
) A for effort, I say to myself! Nice work on those rollers you made!Upvote 0
Update: rolled the barrel on my lego-rollers, and straightend it slightly. Got the liner indexed, but poi stil 8-10 mrad low, at 10 yards, Wich seems a lot to me (380 barrel about 2 mrad low, still with optically centered scope).
I don't know, it feels like something's off, with this barrel.
I double checked my scope, by some " nipple-twisting".
I shot some groups, with differend ammo, wich looked ok. But already using half of my elevation, in the fx nolimit rings, seems like a bad starting point. (Measured in cm) shot at 15 yrds.
I don't know, it feels like something's off, with this barrel.
I double checked my scope, by some " nipple-twisting".
I shot some groups, with differend ammo, wich looked ok. But already using half of my elevation, in the fx nolimit rings, seems like a bad starting point. (Measured in cm) shot at 15 yrds.
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