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#6926093 - 10/19/17 02:10 PM Barrels Hardness
DLALLDER Online   content
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Registered: 11/23/05
Posts: 3127
Loc: Pittsburg, Texas
Does anyone know what the Hardness reading of most rifles. What do you use to clean the carbon out of a very dirty barrel?
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#6926096 - 10/19/17 02:14 PM Re: Barrels Hardness [Re: DLALLDER]
ChadTRG42 Offline
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Registered: 09/16/09
Posts: 11492
Loc: Lewisville, TX
Hardness will depend on the type of steel used- stainless, chrome moly, carbon, etc. The barrel mfg would have to tell you this.
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#6926117 - 10/19/17 02:31 PM Re: Barrels Hardness [Re: DLALLDER]
DLALLDER Online   content
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Registered: 11/23/05
Posts: 3127
Loc: Pittsburg, Texas
Chad, have you checked the Hardness of any barrel? If so what was the reading?
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#6926128 - 10/19/17 02:40 PM Re: Barrels Hardness [Re: DLALLDER]
jeffbird Offline


Registered: 03/09/09
Posts: 2391
After experimenting on cleaning suppressor baffles, the best I've found so far is Hoppe's Benchrest.

To clean heavy powder residue build up in a barrel, use Hoppe's Benchrest - not the old No. 9.

Saturate the bore to the point it is dripping out of the barrel.

I literally pour it into the barrel and rotate it 360 degrees to make sure it is evenly distributed.

Prop the rifle in a corner or the safe with the muzzle down in a cup to catch the liquid and leave it for 24 hours.

Put some dry patches or a paper towel in the bottom of the cup first, which helps minimize liquid spills or drips when picking it up.

Push a copper or bronze brush through it several times, more solvent, more patches.

It will come out like goop.

Repeat again for 2 - 3 times, 24 hours or at least overnight of soaking each time, until there is no more crud coming out.

Wipeout is good, but does not provide the same end result at the Hoppe's BR.

Also the Hoppe's Benchrest will not cause pitting like Barnes solvent (which is great for quickly cleaning out copper).








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#6926141 - 10/19/17 02:52 PM Re: Barrels Hardness [Re: DLALLDER]
redchevy Offline
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Registered: 10/25/04
Posts: 26311
Loc: Texas
Used hope's No. 9 growing up as a kid. Now use a foaming bore cleaner comes in a can like shaving cream with a plastic tube on the end you jamb in the chamber and squirt till it comes out the end then let sit.

It has worked well for me and its easy. Spray it, let it sit 15 minutes brush and patch out and repeat if needed.
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#6926142 - 10/19/17 02:52 PM Re: Barrels Hardness [Re: DLALLDER]
ChadTRG42 Offline
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Registered: 09/16/09
Posts: 11492
Loc: Lewisville, TX
No, I've never paid attention to it. I know from talking to gun smith's and barrel mfg that the hardness does vary depending on the type of steel used. I know that chrome moly steel is a very hard steel, and will wear out reamers and tools quicker than stainless. My old Sako TRG 42 in 300 WM was a chrome moly steel, and it went 2200 hard rounds of 300 WM, which is pretty good barrel life. I would have to consult the barrel mfg to get precise readings on hardness. Just curious, why the interest in hardness?
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#6926178 - 10/19/17 03:19 PM Re: Barrels Hardness [Re: DLALLDER]
DLALLDER Online   content
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Registered: 11/23/05
Posts: 3127
Loc: Pittsburg, Texas
Just my curiosity mostly but was wondering if Barrel Hardness has anything to do with the consistent accuracy of some brands.
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#6926180 - 10/19/17 03:24 PM Re: Barrels Hardness [Re: DLALLDER]
redchevy Offline
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Registered: 10/25/04
Posts: 26311
Loc: Texas
Highly doubt barrel hardness is what makes accurate barrels, if that was all there was I'm sure they would all make them hard as hell.

I would bet it has much more to do with fit, finish, consistencey, set up of the equipment etc. wich would support why good barrels cost more, more labor and checking twice before cutting etc. goes into them.
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#6926188 - 10/19/17 03:34 PM Re: Barrels Hardness [Re: DLALLDER]
DH3 Online   content
Tracker

Registered: 11/18/14
Posts: 506
Loc: Katy
Most rifle barrels are somewhere between 53 and 60 on the Rockwell "C" scale. The softer the barrel, the more easily it will foul and be harder to clean. Typical materials are 1024CM (Chrome-Moly) and 400 series stainless steel.

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#6926447 - 10/19/17 08:39 PM Re: Barrels Hardness [Re: redchevy]
FiremanJG Online   content
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Registered: 12/16/08
Posts: 21802
Loc: Wolfe City, TX
Originally Posted By: redchevy
Used hope's No. 9 growing up as a kid. Now use a foaming bore cleaner comes in a can like shaving cream with a plastic tube on the end you jamb in the chamber and squirt till it comes out the end then let sit.

It has worked well for me and its easy. Spray it, let it sit 15 minutes brush and patch out and repeat if needed.


^^What I do.

I really don't want it 100% clean. But after the foam, and as many dry patches as it takes, sometimes 20, when they come out clean, I call it good.
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#6926533 - 10/19/17 11:02 PM Re: Barrels Hardness [Re: DLALLDER]
HornSlayer Offline
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Registered: 12/13/07
Posts: 1217
Loc: Azle, TX
I don't recall anyone ever saying they temper their barrels. What I do know is the button broach peens the rifling surface as it is forced through the bore. So the bore interior hardness will be higher than the outside surface of a broached rifle. When I was growing up there was a man that lived outside of Covington, Tx that made hammer forged barrels when he was a young man. I remember him saying that he cut the rifling into the bore and his barrels didn't last as long as "Button rifles".

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#6926656 - 10/20/17 07:12 AM Re: Barrels Hardness [Re: DLALLDER]
furfinrfeather Offline
Bird Dog

Registered: 09/17/09
Posts: 269
I heard that Ruger used the QPQ process on some barrels. That would make the surface very hard.

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#6926799 - 10/20/17 08:55 AM Re: Barrels Hardness [Re: DH3]
TDK Offline
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Registered: 09/05/07
Posts: 2725
Loc: Mineola, TX
Originally Posted By: DH3
Most rifle barrels are somewhere between 53 and 60 on the Rockwell "C" scale. The softer the barrel, the more easily it will foul and be harder to clean. Typical materials are 1024CM (Chrome-Moly) and 400 series stainless steel.


I've turned a lot of barrels, most are in mid 30's on the Rockwell scale, soft. I've NEVER seen a barrel up into the 50's. The go to chrome-moly is 4140. Maybe barrels destined for full-auto are harder...


Edited by TDK (10/20/17 09:02 AM)
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#6926802 - 10/20/17 08:58 AM Re: Barrels Hardness [Re: HornSlayer]
TDK Offline
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Registered: 09/05/07
Posts: 2725
Loc: Mineola, TX
Originally Posted By: HornSlayer
I don't recall anyone ever saying they temper their barrels. What I do know is the button broach peens the rifling surface as it is forced through the bore. So the bore interior hardness will be higher than the outside surface of a broached rifle. When I was growing up there was a man that lived outside of Covington, Tx that made hammer forged barrels when he was a young man. I remember him saying that he cut the rifling into the bore and his barrels didn't last as long as "Button rifles".


Work hardening is real. That said when cutting barrels down in the bandsaw it doesn't slow down much when the blade gets to the bore. If the bores were 53-60, you would note a discernible difference.


Edited by TDK (10/20/17 08:59 AM)
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#6926817 - 10/20/17 09:06 AM Re: Barrels Hardness [Re: TDK]
FiremanJG Online   content
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Registered: 12/16/08
Posts: 21802
Loc: Wolfe City, TX
TDK,

Would you be more apt to believe barrels anneal, due to heat and slow cooling?
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