Pure accuracy…. 6br vs 6dasher vs 6GT

[hoz53]

You can order 10 reamers of the same spec and they wont all shoot the same. Its not just about the spec but the actual chamber they cut. Variation in reamers causes this. Its easier for a gunsmith to identify a really good reamer because you see it doing exceptional across a lot of barrels. If you or someone you know always seems to get really good barrels thats also a sign.

thanks for that

 

[Alex Wheeler]

Can it also be the interaction between the reamer and the specific barrel? I imagine each barrel is slightly different even if the reamers were identical. It would be interesting to see the same barrel blank chambered with both reamers.

I I have not seen anything that would make me think that.

 

[Alex Wheeler]

Alex do you think there's an correlation to reamer design for 3,4,5 or 6 groove barrels?
Or bore and groove or both?

No I don't. If its good in a 4 groove its been good in a 5r. I can think of a couple I have that I do 4s and 5r barrels with often and both are very good.

 

[Fire Dog]

Just a bit off subject,
If you have an exceptional barrel that finally need replacing due to throat erosion, can it be cut shorter and just re-chambered and extend the life of the barrel?

 

[LVLAaron]

Just a bit off subject,
If you have an exceptional barrel that finally need replacing due to throat erosion, can it be cut shorter and just re-chambered and extend the life of the barrel?

Barrels get set back all the time. A word of caution... The throat you're cutting into is hard as rock. The stainless work hardens and the carbon buildup is hard as diamonds. If it's a reamer you really love, I wouldn't do it, personally, unless it was carbide.

 

[Evan]

The groove diameter has also opened up, so cutting a thread or two isn’t as good as cutting 3 or 4 inches to get to pristine barrel again. I had 4 inches cut off a 29” HV chambered 6.5x47 with 1100 rounds down it. Rechambered it again and it is shooting phenomenally with another 700 rounds down it now. Right at the last match (LRBR), I shot 2.8 inches at 1000yd - a personal best during a match.

 

[Fire Dog]

Barrels get set back all the time. A word of caution... The throat you're cutting into is hard as rock. The stainless work hardens and the carbon buildup is hard as diamonds. If it's a reamer you really love, I wouldn't do it, personally, unless it was carbide.

Thank you,
I do have all my own reamers but they are not carbide…
I would really hate to ruin one and have to start over with a new reamer.
Being able to have the same chamber every time I find eliminates a lot of “start up” fiddling as what worked before is usually still working and maybe only a slight tweak is necessary to get things going the way it was before the new barrel.