is there any guns where you don't like the thimbles... guns that are factory made?
or even thimble guns factory made that you do like or are made well
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Should you index your barrel?
- Thread starter Michael
- Start date
is there any guns where you don't like the thimbles... guns that are factory made?
or even thimble guns factory made that you do like or are made well
Electrical tape, works for me! And why are thimble’s so bad? Doesn’t the RAW BM use one? And they seem to do just fine in BR. I do agree that the USFT & THOMAS are the best action to secure a barrel and allow you to index also? 
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out off all the 177 high end rifles I have used... the raw I have with thimble is the most accurate air gun I have ever used thus far... so why the did like of thimbles
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I think so. There's more than one custom quality PB gun builder out there that swears by the importance of it.
A properly done thimble works fine in my experience. I had a barrel OD that was smaller than the receiver on a gun build. I had to use one. So I purposely designed it to be an index-able barrel to take advantage of any potential accuracy improvements after the build was done. 18 reference marks on the barrel was too many actually.
This thimble barrel to receiver fit is much better than the stock barrel was.
A properly done thimble works fine in my experience. I had a barrel OD that was smaller than the receiver on a gun build. I had to use one. So I purposely designed it to be an index-able barrel to take advantage of any potential accuracy improvements after the build was done. 18 reference marks on the barrel was too many actually.
This thimble barrel to receiver fit is much better than the stock barrel was.
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Good point Mike, I wish mine stayed put but that's what happens when you think they are too tight and you go reducing the diameter a little (like me). I make a sharpie mark on the end of the liner when I'm trying to get everything back together in the exact same position. Sometimes I have to leave that mark near 90 degrees CCW of the desired position for it to align at the same time my retention snugs up.
jking
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Yeah Jimmy, mine is so tight I need a pliars to remove it, and no way is it turning when it’s all the way in. (pellet liner A) Funny though cause I also had a pellet liner B and that one just slides right in. So much for the “all liners are exactly the same diameter” information… 
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I am about to do this test on my impact. There are a few videos about this indexing and it isn't easy to wrap my head around it especially with all the variables in play.
Do the rotational forces of the projectile rotate the liner, over time?
Is there a known torque setting for the "threaded liner insert" (for lack of better words)?
Has anyone tried to use penetrating loctite or epoxy binding the liner to the "threaded liner insert"?
Do you think there would be any advantage to resetting the scope zero to the intersecting center of the various groups to cancel out the previous windage setting on your scope before making a final decision on barrel index? Of course you would either have to vice the gun and move the crosshairs optically to your new zero or you would have to use turret math.
Do the rotational forces of the projectile rotate the liner, over time?
Is there a known torque setting for the "threaded liner insert" (for lack of better words)?
Has anyone tried to use penetrating loctite or epoxy binding the liner to the "threaded liner insert"?
Do you think there would be any advantage to resetting the scope zero to the intersecting center of the various groups to cancel out the previous windage setting on your scope before making a final decision on barrel index? Of course you would either have to vice the gun and move the crosshairs optically to your new zero or you would have to use turret math.
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