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New 6.5 Idea

 
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  #134  
Old 03-01-2013, 11:24 PM
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Re: New 6.5 Idea

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Originally Posted by 7mmRHB View Post
Thanks Rich, I suspect your case is at least 10 grs larger in capacity and proportioned similarly so I'm betting it will be plenty fast!!! RHB
The capacity should be very close to 71 grs. but with the .320" neck, the base of neck capacity is approx. 67.........Rich
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  #135  
Old 03-03-2013, 11:45 AM
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Re: New 6.5 Idea

Well finally got a minute to post some pictures RHB brought over to me of the 6.5 BPX.
The velocity is where we thought it might be and the case, although it's been shortend can still hold enough of the slower powders to see some pressure signs. RHB stopped going up when he saw any signs of a shinner on the case head so I ran the info he gave me on quickload adjusting the case size and volumne the best I could and I matched up his velocities pretty good.
When he saw the shinner on the back of the case, the info from quickloads showed the loads to be above 66000psi and the next charge down drop the pressure below 64500 and did not show any thing on the case heads.
As you can see from some of the targets the premium velocity is 3050??? and we all new that would be the case.
Now its time for load developement," this little case is going to shoot one hole groups at 3050" and has a large node for accuracy and if the temperature goes up or down this little gun looks like it will just roll with the punches.

Very happy with the outcome, now time to see if we can come up with a little easier way of making the brass, the procedure RHB is using now won't let us share this nice round with very many people.

Thanks for following thread we will keep posting as we move on.
Attached Thumbnails - Click to View Larger
New 6.5 Idea-imr4831.jpg   New 6.5 Idea-h4831.jpg  

New 6.5 Idea-rl19.jpg   New 6.5 Idea-rl22.jpg  

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  #136  
Old 03-03-2013, 01:34 PM
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Re: New 6.5 Idea

Looks like I was wrong about RL17 probably being the fastest. Very interesting indeed. Great shooting guys!

So have you decided on the pet load for this rifle yet?
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  #137  
Old 03-04-2013, 12:29 AM
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Re: New 6.5 Idea

Thanks for getting the pics up Steve, it shows some great potential !! I'm still bummed about the brain fart with the H4831 test though. If it is going to be a one holer at 3050fps we will probably need Goodgrouper to do the shooting!!! I better take a little time and put the fireform rifle together and get some brass fireformed so it's a little easier to start load development.--- RHB
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  #138  
Old 03-04-2013, 12:56 AM
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Re: New 6.5 Idea

Montana, even though RL17 and IMR 4831 showed excellent potential, it was obvious that they were too quick burning. The rifle started handling better as we got to the slower powders with much less squirming around during recoil. What little recoil there is!!

I'm thinking we should try RL 22 and 19 when we start shooting groups. They both achieved the great velocity so effortlessly it would be stupid not to give them both a try!!

It's still a mystery to me how the same charges of 22 gave more fps than 19. Seems like a slow lot of RL19 and a fast lot of RL22?? I guess we'll find out as we go along with load development.
---- RHB
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  #139  
Old 03-04-2013, 01:31 PM
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Re: New 6.5 Idea

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Originally Posted by 7mmRHB View Post
If it is going to be a one holer at 3050fps we will probably need Goodgrouper to do the shooting!!!


Naah, you did fine! And so did the rifle/cartridge. Once again, I was very impressed with what I saw this wildcat do. It hasn't disliked a powder yet. The H4831sc target was the only one that showed something wasn't going to be deadly accurate, and in the end, it wasn't the powder at all! No powders shoot well with loose brakes!

We owe that powder another test run. But honestly, I think the forthcoming load development will show that it's going to be a coin toss!!! There's only a handful of cartridges we can say that about.
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  #140  
Old 03-05-2013, 04:38 PM
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Re: New 6.5 Idea

We probably should run the H4831 test again G.G. and I bet it will be a toss up on powder choice. The biggest problem We have is getting 140gr Berger Hunting VLDs and a supply of the powder we choose after load development is completed. I hope the Hoarders get their fill soon so we can run our business!!! Thanks for all the help!! ---- RHB
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