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6.5x280AI-short
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6.5x280AI

This project is a Yugo Mauser.
I started out to make a 6.5-06, that needed to be shortened .050 to fit a 140 into the intermediate action.
Then I came upon a 6.5x280AI reamer, with plans to shorten the chamber .100”.
What I am looking for is that the shortened AI case capacity will equal the original 6.5-06.
I have a short [small girl] Boyd’s Platinum stock that I profiled the barrel to fit the channel.
21” barrel is threaded for a ‘can’.
Plans to use a Hornady 280 AI Match bushing die with a smaller bushing for the 6.5.
Dies are still a week out.
Hoping that the capacity will be close to the 6.5-06 so that I have load data.


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Posts: 284 | Registered: 15 March 2004Reply With Quote
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Well MoreBS,
That should work as planned....according to my limited brain power.

I like the idea if you're in need of a magazine fit fix.

I use the 6.5 x 280 AI in all it's glorious length but I'd bet in the field there won't be 2 shakes difference between our rounds.

Keep us posted once you get velocities and accuracy result.

Zeke
 
Posts: 1345 | Registered: 27 October 2011Reply With Quote
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Zeke:

Hunting load? 129-140?

Got a bullet and powder that the gun likes?


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Posts: 284 | Registered: 15 March 2004Reply With Quote
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I'm using 140 grain slugs in the 6.5 x 280 AI.
59-60 grains of RL-26 does the trick for me. (I've used the 129 gr LRAB Nosler in the Creedmoor and that works well).

I'm not a huge Berger guy but my rifle likes the 140 EOL Elite Hunter. I've used on on deer, elk and aoudad with excellent results.

I think I'd opt for a more controlled-expanding bullet for elk but it worked just fine on a cow. I also generally use larger caliber rifles on elk anyway so I really don't need to develop an elk load for this cartridge.

Zeke
 
Posts: 1345 | Registered: 27 October 2011Reply With Quote
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Fire formed my first case.

Holds 68 grains of H2O......fired, not sized.

That is the same as a 270 and a 6.5 Rem Mag!

case length is trimmed to 2.430", .100 shorter than the 6.5-280.


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Posts: 284 | Registered: 15 March 2004Reply With Quote
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you should consider this a success!!


opinions vary band of bubbas and STC hunting Club

Information on Ammoguide about the416AR, 458AR, 470AR, 500AR
Order AR/AccRel Brass
What is an AR round? Case Drawings 416-458-470AR and 500AR.
476AR,
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Posts: 34530 | Location: Conroe, TX | Registered: 01 June 2002Reply With Quote
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What about an AI case but trim the neck by .1” so you have more case capacity and don’t have to shorten dies?


577 BME 3"500 KILL ALL 358 GREMLIN 404-375

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"Bubba" by the grace of God.

Four legs good! Two legs baa-d!

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Posts: 26123 | Location: Where tech companies are trying to control you and brainwash you. | Registered: 29 April 2005Reply With Quote
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quote:
Originally posted by boom stick:
What about an AI case but trim the neck by .1” so you have more case capacity and don’t have to shorten dies?


That would work, but I hate short neck cases!

Well , dislike.


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Posts: 284 | Registered: 15 March 2004Reply With Quote
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If you AI a case, I don’t mind a shorter neck if the goal is case capacity. I too like a long neck on traditional carts. Is the case capacity difference worth it? The advantages of the shorter case is the ability to use the 6.5 Creedmoor bullets in the magazine for nominal length mags and shorter cases. Maybe run a 6.5CM neck/throater as a pilot on a AI body reamer to have the good qualities of that CM system on a regular 3.34” mag length gun. Did that make any sense?


577 BME 3"500 KILL ALL 358 GREMLIN 404-375

*we band of 45-70ers* (Founder)
Single Shot Shooters Society S.S.S.S. (Founder)
"Bubba" by the grace of God.

Four legs good! Two legs baa-d!

E Pluribus Popularem et Republican (Out of many, Democrat and Republican)

“We hold these truths to be self-evident. All men and women created … by the — you know — you know the thing.”

Joe Biden.
 
Posts: 26123 | Location: Where tech companies are trying to control you and brainwash you. | Registered: 29 April 2005Reply With Quote
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quote:
That would work, but I hate short neck cases!

Well , dislike.


Would it still be at least the diameter of the caliber in length (.284)? Doesn't seem that short compared to a number of other modern cartridges.
 
Posts: 663 | Location: Central California Coast | Registered: 05 May 2007Reply With Quote
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I have always liked the neck to be at least the caliber size or longer. It is what it is, not going to change it....Might change the barrel some day, no telling what that will be other than a 7mm something or other with a long neck.


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Posts: 284 | Registered: 15 March 2004Reply With Quote
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Got an e-mail today, the Dies and bushing are ready to ship. 280 AI bushing die with a 6.5 bushing, hope it works after shortening.

They are also shipping some scope rail blanks. I want to build a 4 screw single base rail. Holes are already there.

Dam Yugo receiver, there ain't nothing straight.


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Posts: 284 | Registered: 15 March 2004Reply With Quote
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Update on the dies.

The Hornady Match Full SIZE will push the shoulder back. [after shoertning]

but: Looking in the die, the shoulder looks unpolished.

It does push the shoulder back, but it looks a little rough.


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Posts: 284 | Registered: 15 March 2004Reply With Quote
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The first loads:

Reloader 19

2850 with a 140 Hornady. not Max pressure.

20.3/4" barrel, not a bad start!

Did some more loading.

With 10% more case capacity than a 6.5-06, I was able to load 10% more powder.

Primers are near max and speed is 2955 fps.

Tomorrow, I will fire form more cases and shoot a group.


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Posts: 284 | Registered: 15 March 2004Reply With Quote
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First target, first load. Looks like it may shoot!


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Posts: 284 | Registered: 15 March 2004Reply With Quote
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bravo!
good results!


577 BME 3"500 KILL ALL 358 GREMLIN 404-375

*we band of 45-70ers* (Founder)
Single Shot Shooters Society S.S.S.S. (Founder)
"Bubba" by the grace of God.

Four legs good! Two legs baa-d!

E Pluribus Popularem et Republican (Out of many, Democrat and Republican)

“We hold these truths to be self-evident. All men and women created … by the — you know — you know the thing.”

Joe Biden.
 
Posts: 26123 | Location: Where tech companies are trying to control you and brainwash you. | Registered: 29 April 2005Reply With Quote
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