Which barrel makers use a Sunen hone machine on their barrels?

[WayneShaw]

I thought Pacnor does too.

 

[Alex Wheeler]

A bore hone is a great addition to the process, but the groove is 70% of the barrel and the hone wont help the groove. If you study the grooves in a lot of barrels its easy to pick up on the manufacturers that do it consistently.

 

[L.Sherm]

A hone won't over come crap barrel steel either.
Hone or no hone its just one of many processes.

 

[urbanrifleman]

I spoke with Kevin Liebetrau, the pro does the lapping work at Brux, confirmed they do not have a barrel hone

Brux is my favorite cut barrel.

Well, Rock Creek was my real favorite.

 

[urbanrifleman]

A hone won't over come crap barrel steel either.

Preach.

 

[AckleymanII]

what percentage make the grade Ackleyman?

Brux, Krieger, and Muller are some of the very best. Realize that I am not a gunsmith, just a guy who shoots a lot. Hart and Lilja have been fantastic in button-rifle barrels; I have shot out more Hart barrels than all others combined.

There is no excuse for using a rough barrel, no matter who made it. At that point, you learn a hard life lesson on Service After The Sale. Brands mentioned above give top-notch service, and it is an understatement!

A simple investment in a Grizzly rod and about 12-16 Reamer pilots can teach a guy volumes on his barrel. Then, careful examination with a Bore scope leads to very anxious anticipation of getting that barrel on an action ASAP, reminds me of when I was a kid awaiting Christmas Morning!

With the brands mentioned above, if you go through a barrel every one or two years, you may find a cull once in your life, and when you do, those companies will bend over backwards to make it right, leaving you with the feeling that you are dealing with the very best of friends. It is humbling to know that such honest business people are still out there.

Realize, I have not used all barrel companies.

Lean hard on your Bore Scope, assume NOTHING. It is hard to work up a load on a barrel where you need to De-Copper every 3-9 shots, not to mention that it really hurts your pride knowing that you paid nearly $500 for the POS!

 

[L.Sherm]

Preach.

And true or not true?

 

[AckleymanII]

Barrel makers may be their own victims of what the foundry sends to them. Usually, Inclusions in the barrel can not be seen. Dead spots are often found in a barrel that will give strange harmonics.

To detect dead spots, tap a barrel with a 5/8"-3/4" piece of round brass rod. The sound will start at tink, tink, tink, tink. When you hit a dead spot, the sound will go tink, tink, thunk, thunk, then back to tink, tink. Do not cut the barrel off within 2" of the thunk sound, or your accuracy is screwed. You can try this on barrels that you have had that were difficult to tune. An old German Gunsmith taught me this, passed on to him by some old European Master craftsmen.

 

[ELR LVR]

Barrel makers may be their own victims of what the foundry sends to them. Usually, Inclusions in the barrel can not be seen. Dead spots are often found in a barrel that will give strange harmonics.

To detect dead spots, tap a barrel with a 5/8"-3/4" piece of round brass rod. The sound will start at tink, tink, tink, tink. When you hit a dead spot, the sound will go tink, tink, thunk, thunk, then back to tink, tink. Do not cut the barrel off within 2" of the thunk sound, or your accuracy is screwed. You can try this on barrels that you have had that were difficult to tune. An old German Gunsmith taught me this, passed on to him by some old European Master craftsmen.

Nice info there
I did similar looking for equal spacing of nodes but didn't correlate to a "dead spot"
since I didn't find irregular spacing
(take a u-bolt like a muffler clamp) and hang it on the barrel
smack the barrel with a rubber mallet and the u bolt will vibrate and move on down the barrel until it hits a Node, then barely vibrate and will stay there in that zone
Move clamp down and start hitting barrel again until the u-Bolt progresses down to the next node
this of course will correspond to the barrels unloaded resonant frequency
(I clamp the tenon of the barrel in a vise really tight with soft jaws)
---
I'm going to try your trick of looking for a dead spot, I like that

 

[AckleymanII]

ELR, you will love the simplicity of the Brass Rod! I showed this trick to a Master Gunsmith in Dawson, Ga. about 20 years ago, and he started pulling barrels out from under the bench where he had trouble with the tune. He was amazed, shocked, and very, very happy.

 

[ELR LVR]

ELR, you will love the simplicity of the Brass Rod! I showed this trick to a Master Gunsmith in Dawson, Ga. about 20 years ago, and he started pulling barrels out from under the bench where he had trouble with the tune. He was amazed, shocked, and very, very happy.

Cool, I just tried this on 3 barrels
---
So I found that by hanging vertical from the tenon, this produced the best resonance/sound
2 Kriegers I didn't find anything
1 Rem 7/08 Bull barrel found a slight dead spot about in the middle
---
I noticed it's harder to differentiate sound the closer you get to the chamber
since it attentuates the thicker it gets
but I guess the chamber end doesn't matter anyway right?
we're concerned with where the muzzle is cut off at

 

[AckleymanII]

Correct, and mark the dead spot, then measure the length from the breach. Now, examine that area with a bore scope to see if an inclusion is large enough to get to the bore dia.

Quote: "we're concerned with where the muzzle is cut off at"

Yes!