28 nosler

[Calamity]

If things move forward with this, I have a smoked 28 Nosler barrel in my gun safe you can use for information. Real life throat erosion, potential throat sleeve depth, etc. If you want the barrel, all I ask is that I get cool info along the way as you figure things out lol.

Wolf Precision has a cool two part barrel system. The chamber sleeve is cut separately and attached to the barrel afterwards. Might be a good place to start getting info.

Thanks. I will keep your offer in mind. And your suggestion.

 

[Calamity]

Barrel wear is a military ordnance issue for automatic weapons, and there is some unclassified research available. Links at bottom of post. I've concluded that the least expensive, most practical approach to lengthening the life of an overbore barrel burner would be to have your barrel maker build and insert of tungsten-carbide that forms the chamber and freebore. The insert would butt against the rifling leade. This is doable. Reloading dies and metal machining tools are made of it. To make a barrel of Inconel 718 would cost several thousands.
1. https://www.army.mil/article/52605/picatinny-cobalt-alloys-show-promise-for-sustained-firepower/

2. https://www.hpalloy.com/Alloys/hightemperature.aspx

3. https://apps.dtic.mil/sti/pdfs/AD0500112.pdf
(hard to read, but useful info)

 

[Dmagna]

Barrel wear is a military ordnance issue for automatic weapons, and there is some unclassified research available. Links at bottom of post. I've concluded that the least expensive, most practical approach to lengthening the life of an overbore barrel burner would be to have your barrel maker build and insert of tungsten-carbide that forms the chamber and freebore. The insert would butt against the rifling leade. This is doable. Reloading dies and metal machining tools are made of it. To make a barrel of Inconel 718 would cost several thousands.
1. https://www.army.mil/article/52605/picatinny-cobalt-alloys-show-promise-for-sustained-firepower/

2. https://www.hpalloy.com/Alloys/hightemperature.aspx

3. https://apps.dtic.mil/sti/pdfs/AD0500112.pdf
(hard to read, but useful info)

Having a chamber insert won't do anything to prolong barrel life. The life of the barrel is how long the rifling in the throat will last. There are already barrel makers doing chamber sections of barrels and rifling sections for quick change barrel options.

 

[Orange Dust]

Intriguing idea. I'm also curious why this hasn't been done already. I bet there's a reason?

Folks have been getting barrels nitrided for awhile. The Military uses chrome lined and nitrided barrels in machine guns. Hint Hint. No idea if it extends life on a 28 to be worth the time and expense. There is a place in NE Arkansas that does the work. I have heard good things from some wildcatters. don't remember the name of the place but I'm sure Duck Duck can hunt it down for you. The folks that work there can answer your questions.

 

[dave_halsey]

195 eol
79.5G of H1000
ADG brass
C.O.A.L. of 3.700"

MV is right at 2950, shoots under half moa out of a 8.24 twist 26" proof.

 

[Calamity]

If a full length barrel is the only option, then the only consideration is cost. Right now, Inconel 817 is available from Online Metals.com. A 1.25 inch OD round is $638/ft, so a 3 ft workpiece will run about $1800-$1900 depending on qty discounts. I believe a regular barrel maker can do the job, but it will take longer and require tooling. Labor will likely be the major cost. There are other refractory metal alloys available; Hastaloys, cobalt, etc., and it would be a development project to find out which one will replace 4140 moly and SS410/416 for high velocity barrels. It might be worthwhile to the inventor in the long term financially, as the military and other industries might benefit from the research. It is beyond my resources, so I'll leave it there.

 

[bullelk6]

I don't use my 2 28 Nosler's on deer. Mine are setup for 195's at around 3,160 and 3,120 on the two rifles. They are way overkill on deer especially whitetail. The two deer I did shoot with mine were shoulder shots and all the meat in the front shoulders was pretty much ruined. One you could run your hand through him pretty much.

Elk different story. Work's freaking awesome and they will shoot a long long ways. Both are .2 moa shooters

I just got 2 boxes of the 195s could you clue me into a good load for them?

 

[Longtine88]

H570 or Retumbo

 

[Longtine88]

H570 or Retumbo

N570 83.0 grains 195 eol 215m primer new adg Brass.

Works in pretty much every 28N I've tried. Most touching lands. Some off to 0.020". But most like the lands touching

 

[lancetkenyon]

I have seen 28 Nosler barrels, when run at the top end, go in as fast as 450 rounds. Usually, with a 195 @ 3050-3100ish, barrel life will be 600-800 max.
Also depends on powder choice. N570 and RL33 are murder on barrels, but if you want the speed, they are the kings.
I run my 28 Nosler in the moderate fast range,195 @ 3084 with 89 rounds down the barrel. It also loves the 177 Hammer at 3220fps. It has not come out of my safe for 2 years due to no elk tags in the family.

 

[Longtine88]

Agree lance but I just screw in another barrel and go again lol it for sure is a barrel burning caliber