Barrel burnout

[gvjm]

So my 223 H-Bar heavy barrel AR stopped grouping. Once a under half inch gun now it's throwing 1 1/2" to 2" groups. This is a prairie dog gun with close to 10000 rds through it, all hot loads. But just were does the barrel burn? I was under the impression it starts at the throat but I was told that it can also be at the crown. If true can I cut the barrel down and recrown it? Does that even make sense?

 

[Beluebow]

Unless you smith your own stuff the juice isn't worth the squeeze IMO. Get a new barrel be happy and feel like Superman for 10k more rounds.

 

[Greyfox]

They look something like this when shot out…from the throat forward….

 

[Kansaswoodguy]

No way it's cost effective to fool with that old barrel just get a new one even if I could do it myself with that round count I wouldn't bother.

 

[Coyote Shadow Tracker]

You can get better accuracy by re-crowning a barrel if has uneven wear. At 10,000 rounds I would not waste $75-$100 to recrown or my time to do it for free. Put that money toward a new barrel!

 

[Rick Richard]

What everyone else has said "Put that money toward a new barrel!"

 

[xsn10s]

One more vote on a new barrel. With 10k rounds down that barrel and it getting pretty hot you got your use out of it.

 

[Greyfox]

My guess would be that your H-Bar has a chrome-lined barrel…..Or your barrel would have been shot out at half or less the number of rounds you have down the barrel before seeing the drop in accuracy.
An approximate guide(varies with shooting conditions, over-bore, accuracy delta, etc)

 

[cowboybart]

Greyfox, in the chart, what does Bore Capacity Charge Weight mean and how is it derived?

Yes, get a new barrel. The one you have probably has 2" of "freebore"

 

[epags]

What cowboybart said

What does Bore Capacity Charge Weight mean and how is it derived?

 

[Greyfox]

Greyfox, in the chart, what does Bore Capacity Charge Weight mean and how is it derived?

Yes, get a new barrel. The one you have probably has 2" of "freebore"

The bore capacity/weight in the chart is the charge weight of the length of the cartridge were equal to the diameter. The author intended it to show this value(charge weight) to serve as a reference (or index) point between the calibers when a "square" charge is loaded. The degree of "over-bore" is dictated by how much you exceed this ((square) charge weight. "Over-bore" cartridges generally produce less barrel life. For example a 6.5 calibers bore capacity charge weight is 33gr. With an estimated 3000 round barrel life. At 60grs the barrel life drops off to 1000 rounds. This cartridge/ load would be considered over-bore….more so then a 6.5CM with a 39gr charge. Most all modern cartridges have charges that are greater then the square charge…it's only used as an index to compare the degree of over-bore. I believe authors overall intent of the chart was to show relative comparisons with caliber. Absolute barrel life is effected by several variables, but the values shown in the chart tie pretty close to my own experiences given "average" use…not babied/not cooked.

 

[Greyfox]

An article from Accurate Shooter that uses cartridge capacity to bore diameter to rank over-bore with various cartridges.

You are being redirected...

 

[Ol' Red]

Since you can purchase a ne barrel for around $300.00, I would replace it with new. You probably got all that barrel had to give.

 

[VinceMule]

Call X Caliber rifle barrels, you will have a great shooting barrel when you get it installed. I think that they also have reamers with various lengths of throats.