Bore scoping Tikka T3lite
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- Last Post 18 July 2018
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Having trouble with myself and my Tikka t3. A shooting friend said maybe I had shot it to much,so cleaned it good and remeasured col. I have been shooting the NOE 227-80sp,gs & coated at 2.480col.new measure is 2.539.So I scoped it chamber looks good to me, but barrel has these diagnial, about 45 degree marks all along it. WHAT ARE THEY! thank Nosee
Probably score marks from using a Dewey plastic coated cleaning rod that had a piece of hard grit, sand, etc. embedded in the rod cover. Happens quite often, actually. It appears to over the lands and down into the grooves so it was done after rifling.
Drill marks from factory maybe cause buy extracting drill?
I doubt your barrel is shot out. Bullet fit is most probably the issue.
These all look very uniform, same angle same distance apart. I,am not sure human could make these that uniform. I have a newer Tikka t3x lite same cal.no such marks. I give up. thank you. Nosee
The mark goes into both the lands and grooves. Therefore, I do not think it was done through cleaning. I think it was somehow done during, drilling, reaming, or rifling. I believe your rifle has a barrel that is hammer forged. If you look on YouTube you can see how it is done. I think that is your answer.
I am pretty sure you are right about hammer forging in Tikka barrels since my chamber and throat don't appear to have been cut. If so, there was no drilling, reaming, or rifling operations. That makes the marks even more mysterious.
Ric's theory seems unlikely since the mark is rotating much faster then the rifling and and is also in the grooves. But we know he doesn't approve of Dewey cleaning rods. I agree that hard steel is probably better.
Maybe a defect on the mandrel????.
From bore scoping and shooting a lot of rifle barrels with defects such small defects seem to seldom if ever seem to affect accuracy.
Nothing wrong with Dewey rods if you wipe the rod every stoke to stop fouling from embedding in the plastic. But you guys are right, the marks would be slower than the twist if from even a dirty rod. So some error in the hammer process much more likely.
This is the Tikka I sent back. The only report they gave me was that it was very dirty! I can,t see dirt or fouling in the borescope picture? My new Tikka t-3 lite does not have those groves. However the one I sent in will outshoot the new one? It got me stumped!
I'd go with a problem with the drill/ream operation. Once the drill or reamer is all the way through the barrel it is withdrawn and a chip was on the drill/reamer creating a groove. The groove was sharp and/or deep enough so that it did not get ironed out during the forging operation.
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