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Thread: 6.5x55 Swede Ackley Improved BJAI

  1. #1
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    6.5x55 Swede Ackley Improved BJAI

    I just put my order in for a 6.5x55 BJAI swede barrel from Ragged Hole barrels. I went with the Wilson 26'' 1:8 twist varmint contour. I have a nice wood stocked model 110 .270 I got just for this project last fall. It's been sitting in the corner, waiting for attention. While I wait I'm on the hunt for some dies. The goal of this cartridge is to push 140-150 grain slippery bullets at 2900+fps, with moderate pressure, into a ragged hole. Time will tell.

    Feel free to post pictures of beautiful Swedish girls holding rifles while we wait

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    I'll be interested to hear about this project, being a long-time Swede fan. I've got a 26" X-caliber 1:8 6.5x55 (standard) heavy on a 110. Getting 2925 - 2950 fps with 140s (depending on the projectile). My target pressure is 58K. I use Reloader 26, exclusively.

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    From my reading, reloader 26 is some magic stuff. I have a stash of h4831 for this project.

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    Great choice for a cartridge to work with. The 26" barrel and that capacity ought to be about the most you can squeeze out of a 6.5mm with good barrel life.

    If some pundit comes along and blows the .260 Rem out to a 30 shoulder so I can crunch in a couple more grains of H4831 and calls it "Improved" I might start looking for a gunsmith with that reamer.
    "They couldn't hit an elephant at this distance." Last words of Gen. Sedgwik

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    I haven’t looked at the specs on the BJAI, but we’ve got a few here running 6x55’s made by running a 6BR reamer in an additional .580 or so. 30 shoulders and minimal body taper (.460 at case/shoulder) on 6.5x55 Lapua brass. You might compare your print to the 6.5BR, you may find that it’ll work for sizing and eliminate the need for custom dies if that cartridge is what I think it is.
    Originally Posted by keeki
    Guess it doesn't really matter. If ya cant afford $15, you won't be buying much anyways

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    Quote Originally Posted by Stumpkiller View Post
    If some pundit comes along and blows the .260 Rem out to a 30 shoulder so I can crunch in a couple more grains of H4831 and calls it "Improved" I might start looking for a gunsmith with that reamer.
    http://www.6mmar.com/260_Imp_30_.php


    Looks like JGS makes the reamer, and could tell you the smith that has one.

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    Hotolds442, its a good idea. I did the calculation on body taper per inch to see if any would match and have the correct length neck. I do kinda regret going the road less traveled. A 260 AI would save me 80$ on dies, and 308 based brass.

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    Quote Originally Posted by Robinhood View Post
    http://www.6mmar.com/260_Imp_30_.php


    Looks like JGS makes the reamer, and could tell you the smith that has one.
    Bah. My network admin here at work considers that website "Weapons" and I'll have to open it from home. But thank you for the link.

    I did open it in "Cached" mode to read through it and will check it out again at home. 40 is a bit severe, but Mr. Ackley liked it.

    Not that I have exhausted the full potential of the stock 20 shoulder. ;-)
    "They couldn't hit an elephant at this distance." Last words of Gen. Sedgwik

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    Quote Originally Posted by Evlshnngns View Post
    Hotolds442, its a good idea. I did the calculation on body taper per inch to see if any would match and have the correct length neck. I do kinda regret going the road less traveled. A 260 AI would save me 80$ on dies, and 308 based brass.

    The original 6.5-08 (Ken Water's .263 Express) was on formed .243 Win brass. Just think - he missed naming the winner in 1956 by 0.001" And he had the proper twist as well.

    https://www.riflemagazine.com/magazi...110partial.pdf
    "They couldn't hit an elephant at this distance." Last words of Gen. Sedgwik

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    Called the first of this week, said 2-3 more weeks. Neat article on the 263 express.

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    I got it! Thanks John and all the others at RHB. It looks really nice, threaded on the reciever good-n-tight. Hopefully I get to shoot it this weekend.

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    Keep us updated. I have one in the works too!

    Sent from my SM-G930V using Tapatalk

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    I built one a few years ago on a 700 with 26.25" barrel. I haven't chronographed it since I've been finishing the stock at a snail's pace. I went with Redding Dies. Here is the text of an email, originally from Bob Jourdan, about the cartridge:

    Here are some of the powders that I have tried and my thoughts on how
    well they responded accuracy-wise:

    all data below used Fed210 primers and 140gr bullets seated into the lands.


    IMR4831 - up to 47gr. pressure signs were ok but didn't show much
    promise so never persued this powder any further.

    IMR7828 - up to 50gr pressure was fine. Have more room to go up.
    Showed good accuracy and numbers on the chrono were very good. Would
    be worth a second look.

    R25 - up to 54.5gr pressure was ok, accuracy was ok velocity was 3080.
    Never persued this any further.

    H1000 - up to 54gr. This had decent pressure. Probably has a little
    more room to go up but accuracy was showing a lot of promise right in
    the 53.5gr region so I never went higher. velocity was 2930fps. I went
    back to this load more than once and would probably be my second
    choice of powder for this chambering with 140gr bullets.

    H4350 - up to 48gr pressure was getting up there but still had more
    room to go if needed in case of hot weather. But the accuracy jsut
    wasn't there for me even though several of the 6.5x284 shooters said
    this powder worked great in their rifles. I jsut never got it to shoot
    very well. But more than one 6.5x284 shooter has won with this combo
    also. Just an FYI.

    H4831 - up to 51.5gr velocity is right around 3000fps and this would
    be considered a max load for me without drastically shortening your
    case life.

    50.5gr of H4831 after many years and barrels is my go to load for
    140gr class bullets. this should give you right around 2925fps avg MV
    and adjust your seating depth and neck tension and tweek your load
    from here and I think you will be surprised. It's always worked for
    me.

    Also as for the case head diameter yes RWS cases measured the smallest
    for me. My chamber measures .4785 (Dave keep me honest here!!) and RWS
    cases measure .4765/.4766" right out of the box. Lapua and Norma
    measured high .477?" out of the box. RWS has given me the longest case
    life but you can't get htem any longer. Lapua was very good for case
    life and Norma you have to watch the primer pockets. But I think I now
    have 15 or so loading on my Norma brass and they just barely hold a
    primer but they shoot and measure as well as the RWS and Lapua.

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    RHM, THANKS. I was on the hunt for load data last night. I loaded a dozen starting at 48gr and stopped at 51gr h4831. I'll be watching close. At 51 there is still room in the case, I might try a slower powder some time.

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    I wish I could share some personal experience, but I haven't shot it much, and what I have done has just been fireforming. I've been kind of slow to get my shop set up, so the project has been stretched out over the years. I always heard to fireform with max 6.5X55mm loads and work up to 6.5-284 loads since the capacities are so similar. I'm told there is an accuracy node around 2930-2950fps and another around 3050 or 3100fps. There's another thread on a site you can probably find with a quick search called the "6.5 Addiction (Swedemoor)", which also looks to have some good info with a little hotter loads than where Bob was at in his original development.

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