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#6413887 - 08/18/16 08:01 AM 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds
jorge Offline
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Registered: 02/01/11
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Plan on building one up. What length would you go with running a sendero to rem mag contour
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#6413892 - 08/18/16 08:03 AM Re: 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds [Re: jorge]
HorizonFirearms Offline
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We built a 16.5 inch 6.5 creedmoor for TexFlip on here and I know he has been killing axis deer just under that yardage Think he said 450 is the farthest so far. I personally would go with the shorter barrel.
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#6413913 - 08/18/16 08:16 AM Re: 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds [Re: jorge]
dee Online   content
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The 22 will yield about 50-75fps slower than the 24 so likely it'll run normal 260book velocities.
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#6413939 - 08/18/16 08:34 AM Re: 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds [Re: HorizonFirearms]
TexFlip Online   content
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Originally Posted By: HorizonFirearms
We built a 16.5 inch 6.5 creedmoor for TexFlip on here and I know he has been killing axis deer just under that yardage Think he said 450 is the farthest so far. I personally would go with the shorter barrel.

I approve of this message.

Actually, furthest on an axis was right over 350 mark. Pigs have dropped north of 400.
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#6413945 - 08/18/16 08:40 AM Re: 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds [Re: jorge]
jeepercreeper Online   content
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Dumb question....would the AI part kind of make up for the 2" of barrel?

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#6413950 - 08/18/16 08:44 AM Re: 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds [Re: jorge]
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Dee...so a 24" 260 AI will run about +/- 100fps faster than 24" or a 22" std 260?

Any rough idea what I could expect from a 6.5x284 or 6.5x'06 rechamber in a std 260 T3's 22" barrel ? Or would those rechamber efforts in the '06 be better served in a T3 Swede's 22" barrel?
Ron
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#6413988 - 08/18/16 09:02 AM Re: 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds [Re: TexFlip]
Misfire Offline
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Registered: 02/16/11
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Originally Posted By: TexFlip
Originally Posted By: HorizonFirearms
We built a 16.5 inch 6.5 creedmoor for TexFlip on here and I know he has been killing axis deer just under that yardage Think he said 450 is the farthest so far. I personally would go with the shorter barrel.

I approve of this message.

Actually, furthest on an axis was right over 350 mark. Pigs have dropped north of 400.


I saved a pic of your rifle. As soon as I have the pennies I'm going to have HF do something similar for me. If I were the OP, I'd go with the shorter barrel too..

.
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#6414014 - 08/18/16 09:14 AM Re: 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds [Re: WileyCoyote]
dee Online   content
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Originally Posted By: WileyCoyote
Dee...so a 24" 260 AI will run about +/- 100fps faster than 24" or a 22" std 260?

Any rough idea what I could expect from a 6.5x284 or 6.5x'06 rechamber in a std 260 T3's 22" barrel ? Or would those rechamber efforts in the '06 be better served in a T3 Swede's 22" barrel?
Ron


08 based rounds typically only farmer 75fps sometimes 100 barrel depending. Some guys get faster by running Palma brass but pressure is a bit higher than samii loads.

Not sure on those but I'd imagine there would be a lot of unburned powder not getting used.
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#6414056 - 08/18/16 09:36 AM Re: 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds [Re: jorge]
FiremanJG Offline
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Might as well shorten it to make it more manueverable. It'll make plenty of velocity for a 600- yard hit.
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#6414158 - 08/18/16 10:47 AM Re: 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds [Re: jorge]
jorge Offline
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How short do you suggest fireman?

What kinda velo does that creed get from a 16" barrel?


Edited by jorge (08/18/16 10:48 AM)
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#6414160 - 08/18/16 10:50 AM Re: 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds [Re: jorge]
TexFlip Online   content
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Registered: 08/18/12
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Originally Posted By: jorge
How short do you suggest fireman?

What kinda velo does that creed get from a 16" barrel?

I'm getting around 2720 with 120s.
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#6414171 - 08/18/16 11:00 AM Re: 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds [Re: jorge]
FiremanJG Offline
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Registered: 12/16/08
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Originally Posted By: jorge
How short do you suggest fireman?

What kinda velo does that creed get from a 16" barrel?


I know 140's. A .260 (not A.I.) commonly makes 2800 fps out of a 24" barrel. Same holds true for my 25" 6.5 Creedmoor.

Every inch cut off, lose 20-25 fps MV, rule of thumb.

22" ~2760 to 2750 MV
20" ~2720 to 2700 MV
18" ~2680 to 2650 MV

Shortest bolt action I have is the 7mm-08 with a 20" barrel, sure is handy!
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#6414197 - 08/18/16 11:21 AM Re: 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds [Re: FiremanJG]
cmorsch Offline
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Registered: 08/16/11
Posts: 1484
Loc: Midlothian, TX
Originally Posted By: FiremanJG
Originally Posted By: jorge
How short do you suggest fireman?

What kinda velo does that creed get from a 16" barrel?


I know 140's. A .260 (not A.I.) commonly makes 2800 fps out of a 24" barrel. Same holds true for my 25" 6.5 Creedmoor.

Every inch cut off, lose 20-25 fps MV, rule of thumb.

22" ~2760 to 2750 MV
20" ~2720 to 2700 MV
18" ~2680 to 2650 MV

Shortest bolt action I have is the 7mm-08 with a 20" barrel, sure is handy!

Im getting 2675 out of mine 260 (not A.I.) with a 23" barrel running 140's, buts thats only because I hit pressure signs due to the suppressor and the ES and SD shot up at velocities higher then the load I decided on.


Edited by cmorsch (08/18/16 11:22 AM)

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#6414199 - 08/18/16 11:23 AM Re: 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds [Re: jorge]
jorge Offline
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Those are pretty good numbers.
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#6414216 - 08/18/16 11:35 AM Re: 22" vs 24" 260 ai what would you go with for a mountain rifle shooting to 600 yds [Re: jorge]
FiremanJG Offline
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Registered: 12/16/08
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Loc: Wolfe City, TX
Originally Posted By: jorge
Those are pretty good numbers.


Those would not be brand new barrel, and virgin brass numbers. It's not uncommon for 6.5 mm to speed up after getting 200-250 rounds on them. Couple that with brass that has the shoulders bumped .002" from the fired length. Those numbers I wrote are post barrel seasoning, and brass fit to the chamber. I don't like brand new barrels and virgin brass for this reason. It has to be done, of course, and thankfully the only way to get out of that is to shoot the rifle. smile
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