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Post by GLSHOOTER on Jan 31, 2019 13:03:58 GMT -8
I chamfer every new case no matter what it is as part of my pre-loading brass prep. The necking down with bushings almost demands it. One other thing I've learned was that WILSON bushings have a bit of a lead in chamfer compared to the Reddings that are more squared up to the hole.
Greg
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BigBore
Junior Member
My name is John Wick, you killed my puppy, prepare to die.
Posts: 44 
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Post by BigBore on Feb 3, 2019 16:48:30 GMT -8
Q for you Greg. My 20 inch chambered blank in 6mm x 6.8 should be here this week and then it goes to my guy for profiling. I will be using rifle gas and to save a little time, do you have access to information regarding the gas port size? I usually pick a load that I think will work then start at .060” and go up in number size until it works. But it takes time and it’s damned cold outside right now. Any information about gas port size will keep my old butt indoors reloading instead of running in and out sizing the gas port.
Thanks in advance.
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Post by GLSHOOTER on Feb 3, 2019 19:07:33 GMT -8
That's one aspect I have no idea on. A call to BHW might be fruitful.
Greg
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BigBore
Junior Member
My name is John Wick, you killed my puppy, prepare to die.
Posts: 44
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Post by BigBore on Mar 6, 2019 11:46:14 GMT -8
BHW (CRA) got back with me on the gas port size. For a 20" barrel, rifle gas, .875" at the gas block, they told me a gas port of .100" is what they use. Good enough for me. Barrel is back, ready to go.
Now, I have looked through every single one of these posts and never is there mentioned the maximum case length and the trim to length.
Greg, would you please give me that information? I need the maximum case length allowed by the BHW/CRA chamber and the trim to length also if they recommend a length. I normally go .010 under maximum length on high pressure rounds, .005 on low pressure rounds.
I formed 50 cases, no losses, and right now the cases are 1.680 + or - .002" so they need to be evened up. Max length on the 6.8 case, according to Hornady, is 1.686 with a TTL of 1.676.
Thanks.
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Post by GLSHOOTER on Mar 6, 2019 11:49:45 GMT -8
Trim is standard 6.8 length.
Greg
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BigBore
Junior Member
My name is John Wick, you killed my puppy, prepare to die.
Posts: 44
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Post by BigBore on Mar 6, 2019 11:54:56 GMT -8
Thank you very much. For those that might be asking the same thing, Max is 1.686", TTL is 1.676" for the 6.8 SPC case.
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Post by GLSHOOTER on Mar 6, 2019 13:21:43 GMT -8
Thank you very much. For those that might be asking the same thing, Max is 1.686", TTL is 1.676" for the 6.8 SPC case. Thanks. I thought it had been covered. There was question on this on Page#2 so I bumped and pinned it. linkGreg |
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BigBore
Junior Member
My name is John Wick, you killed my puppy, prepare to die.
Posts: 44
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Post by BigBore on Jul 3, 2019 18:42:05 GMT -8
What a barrel! Thomas at Paladin Machine Shop Service turned the chambered blank into a work of art. I tried a few powders but IMR 8208 XBR gave great accuracy with acceptable velocity. In regards to bullets, the Hornady 90 gr. ELD-X seated to 2.295” and Barnes 80 gr. TTSX seated to 2.312 were both half MOA shooters for 5 shots at 100 yards. A little ¼ turn crimp with the Lee FCD destroyed accuracy, tripling group size with both bullets. Don’t even want to talk about the Barnes 90 gr. TTSX-XLR. Nothing under an inch, most around 1.5”, some as big as 3”.
As Charlotte said, sort of, That’s Some Pig Barrel.
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