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New 6.5 Idea

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  #29  
Unread 01-30-2013, 04:04 PM
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Re: New 6.5 Idea

Montana Rifleman, I think you will be able to get to 3050 fps with the 180s on the 7 Dakota improved. The 300 Dakota improved, necked to 7mm will get you to 3200+ but the case life will be a bit short. The guys that I did that version for, backed their loads of to about 3180 and the primer pockets have held up since then. The 7mm RHB does 3240 with the 180s but shoots best at 3150. Best accuracy is with 86 to 87 grs. H 50 BMG and the 180 Berger jammed .010. The 200 Wildcats ran at 3020 but my gun didn't like them? I have 250 left if anybody wants them?

The 7mmRHB bbl is 28" long and the gun weighs 9lbs total. The base dimensions stay the same with .010 taper removed at the shoulder and tight neck . ( .0025" total clearance.)

Good luck with your projects ---- 7mmRHB
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  •   #30  
    Unread 01-30-2013, 07:53 PM
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    Re: New 6.5 Idea

    Keep on keepin' on guys! You have a sweet looking case there and having fun is all part of the program. Whether it makes the velocity you are looking for or not, it will be a great cartridge I'm sure......Rich
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      #31  
    Unread 01-30-2013, 09:36 PM
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    Re: New 6.5 Idea

    looks very interesting good luck keep us posted.
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      #32  
    Unread 01-30-2013, 11:46 PM
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    Re: New 6.5 Idea

    Quote:
    Quote:
    Originally Posted by 7mmRHB View Post
    Montana Rifleman, I think you will be able to get to 3050 fps with the 180s on the 7 Dakota improved. The 300 Dakota improved, necked to 7mm will get you to 3200+ but the case life will be a bit short. The guys that I did that version for, backed their loads of to about 3180 and the primer pockets have held up since then. The 7mm RHB does 3240 with the 180s but shoots best at 3150. Best accuracy is with 86 to 87 grs. H 50 BMG and the 180 Berger jammed .010. The 200 Wildcats ran at 3020 but my gun didn't like them? I have 250 left if anybody wants them?

    The 7mmRHB bbl is 28" long and the gun weighs 9lbs total. The base dimensions stay the same with .010 taper removed at the shoulder and tight neck . ( .0025" total clearance.)

    Good luck with your projects ---- 7mmRHB
    Thanks for the info, much appreciated.
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    - Mark

    You will never know how much it has cost my generation to preserve your freedom. I hope you make good use of it.
    ~ John Quincy Adams
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      #33  
    Unread 01-31-2013, 11:16 AM
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    Re: New 6.5 Idea

    Finally took a picture of the sectioned out brass to show a comparison of 6.5-284 when the bullet is seated to fit a standard Remington magazine box. Granted alot of 6.5-284 are in long actions or shot as single shots but this kind of shows where the thought started.
    The picture is with my cell phone and is not very good quality but I think it shows the bullet base takes up alot of space in the 6.5-284, so a simple look would be by staighting the walls the short case it holds almost the same amount powder but will run at different burn rate and the case will be 90%+ full compaired to say 75%?? on the 284 case, making the short case more efficient. (we hope).
    The stock is all painted and I think the only thing left is making the full lenth sizing dies and we are ready to move forward. I'm going to chamber a take off barrel for fire forming, those Proof Research barrels cost to much to fire form with.

    Thanks again for following our project, it kind of spurs me along to get it done when I,m writing about the progress.
    Attached Thumbnails - Click to View Larger
    New 6.5 Idea-photo.jpg  
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      #34  
    Unread 01-31-2013, 12:26 PM
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    Re: New 6.5 Idea

    Steve got the last of the little parts that needed to be coated last night so it's time to get this sucker put together.!! We'll get some pics to add to this thread and then fire form a bit of brass while doing the break-in this weekend. If Steve gets the sizing die done we'll run a velocity test with a couple of powders we think will be the correct burn rate and report back, good news or bad!

    Thanks to all of you that have taken some interest in this little project. ( even the skeptics ) ----- 7mmRHB
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      #35  
    Unread 01-31-2013, 01:13 PM
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    Re: New 6.5 Idea

    Lookin' good guys! The 6.5 Rem mag had the same problem in factory rifles and never performed up to par for the capacity so your idea is sound. I am still quite skeptical of 3075' in a 26" barrel, but we'll see. Good luck and keep the data coming.......Rich
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