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View Poll Results: Better caliber for long range/ all around hunting using 140 gr bullet
6.5-06 AI 174 43.28%
280 AI 228 56.72%
Voters: 402. This poll is closed


6.506 vs 280 AI using 140 gr bullets

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Unread 03-31-2010, 06:10 PM
Bronze Member
Join Date: Nov 2009
Location: Oregon
Posts: 36
Re: 6.506 vs 280 AI using 140 gr bullets

I will have to get my load book out tonight, but for some reason 49 grains sticks out but do not do a thing untill I confirm this. I used noslers book to start with and did nothing special from there. I do like winchester 25-06 nicle plated brass for this rifle though, mostly becouse it just looks so damn cool with the burger moly bullets. I also think that the P5 1-8 is the reason for the speed. I have shot a couple of Schneider barrels now with this p5 rifling and they are shooting 150 to 200 fps faster than I was expecting. I have that 338 Lapua build that is doing the same thing. it shoots to 2887 with the 300smk and I have not even pushed it yet. that is just a book load of 90.5 of R-25 and Federal primers, it throughs 265s at 3250 without trying very hard either.

I really think that the barel is the couse not something else.

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Unread 04-01-2010, 11:35 PM
Bronze Member
Join Date: Nov 2009
Location: Oregon
Posts: 36
Re: 6.506 vs 280 AI using 140 gr bullets

Load data I use:

You must have all your poop right to get things this hot, like new brass, new brass and new brass. OK so just watch your brass. I like Federal primers, non magnums.

Do not do this right out the gate, standerd reloading disclaimers apply.

H4350 48.5 gr under a 140 sierra and or burger. 3067fps

at 50 grains you get to 3135, but again this is not taken lightly.

start at 46.5 and go up from there.

this is the best load that I can make with my 6.5-06
I love to shoot 107smks at 3606 with 54 gr of h4350, and it loves to eat coyotes.

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Unread 04-03-2010, 02:04 AM
Silver Member
Join Date: Jul 2009
Location: Salmon, Idaho
Posts: 392
Re: 6.506 vs 280 AI using 140 gr bullets

I voted for the .280AI for a couple of reasons, #1 it will shoot the 140grn bullets at near the same BC but affords you the flexibility to go up to 160grn pills and match or beat the BC of the 6.5/140s. I'm waiting for enough disposable income to convert a Rem 721 to this caliber. #2 is I've got a 6.5x55 Match on a Mauser '98 action that I just completed and it would seem redundant now to add another 6.5 long action to my stable. BTW the Mauser puts 140grn Bergers into groups at .38" with 46.7grns of R22 at around 2800fps. Don't know how much more velocity I could add if I changed it to a AI?
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Unread 04-29-2010, 06:36 AM
Silver Member
Join Date: Nov 2006
Location: new mexico
Posts: 243
Re: 6.506 vs 280 AI using 140 gr bullets

3 years ago i had a custom rifle built.
i too was on the fence between the 2 calibers.

i chose the 280ai for several reasons.
1st was no matter what you have to make 6.5-06 cases. 280ai cases and ammo are available, and most important, if you were to travel and your ammo didn't make it, one could shoot regular factory loaded 280 ammo and still enjoy your trip.

the bc's are the same but different depending on which bullet type and weight you choose.

but, at normal shooting ranges, does it really make that big off a difference ?

nope, maybe, maybe, an inch or 2 at the very most ?
we all shake more than that when we get excited.

here's mine.

it is in a laminated stock at present and will be my main hunting stock. i am having an english walnut stock made for it as i type.

benchmark barrels did the blueprinting, and made the barrel. they did an excellent job chambering and even made a stoney point oal gauge casing made from a test fired casing for me.

it did kill a cow elk at just shy of 300 yards 2 seasons ago, launching a 140 grain barnes ttsx, at just over 3100 fps.
i also just got done fireforming some nickle plated 280 cases. they turned out perfect.

i also have a 264wm, but still working on loads for it.
so far it seems to like 130 accubonds.
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Unread 04-29-2010, 10:47 AM
Platinum Member
Join Date: Dec 2008
Location: rathdrum, id.
Posts: 5,266
Re: 6.506 vs 280 AI using 140 gr bullets

Nice setup! That walnut stock is beautiful......Rich
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Unread 05-18-2010, 04:59 AM
Junior Member
Join Date: May 2010
Location: crownsville, md
Posts: 3
Re: 6.506 vs 280 AI using 140 gr bullets

i built a 6.5-280ack last summer on a sako l61r action. mcmillan edge stock. lothar walther barrel(#4contour). it shoots in the .5s with 120gr barnes ttsx and about the same w 120gr nosler bts. i chrono'd the barnes at just over 3400fps(25.4" barrel). im very happy w it but i am ordering a slightly lighter contour, fluted broughton. the l.w. is ok in the accuracy dept but heavier than i wanted(i wanted it ready to go by the fall and didnt have time to wait for a broughton. and i already had the l.w. blank...) and fouls faster than id prefer. topped 1st w a bushnell 4200 2.5-10 and now a leupold vx-L 4.5-14. oh, and i use the .280ack nosler brass. havent had the primer probs mentioned earlier in the thread, and my loads are warm. ive used the brass 7x now...using the redding 280ai bushing neck sizer, 280ai body sizer, and had a custom seater made frm redding.
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Unread 10-29-2010, 06:57 PM
Bronze Member
Join Date: Oct 2010
Location: Norway
Posts: 69
Re: 6.506 vs 280 AI using 140 gr bullets

I have a Tikka M695 in 6.5x65RWS. It out performs the 6.5-06, 6.5-284, 264 WM and whatever 6.5mm there is.
I have had this rifle for 2 years now, and I have shot 50 deer with it, using the 140 grs Nosler Accubond. I have pushed this bullet out of the barrel at 980 m/sek at most. This was a real HOT load, and is not recomended, my average speed is 960 m/sek. All the deer I have shot, went down instantly, they never walked an inch.

I am currently using a Hart barrel, 1:9 twist and 68 cm long. I will change it, and try a S&L fluted barre, 1:8 twist, and 74 cm long. I use a Hausken Silencer when i hunt, and a muzzle break for practise. If I use the silencer, I get a lot of mirage, and that is a pain, when shooting long range.

This cartridge is supersonic beyond 1200 meters, and would be a great LR option.
Just my 2 cents

Three shot group at 200 meters
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