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Joined: Sep 2005
Posts: 4,305 Likes: 3
Campfire Tracker
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OP
Campfire Tracker
Joined: Sep 2005
Posts: 4,305 Likes: 3 |
Going to throw together a Rem 700 LA i've had for some 33 years, a 24" #3 Hart fluted barrel and set it down in a D'Arcy Echols Shrike stock. Caliber? Dave Kiff calls it the 6.5x57BR. Lapua 8x57 brass, necked down to 6.5mm and shoulder blown out to 30 deg. Running Barnes 127 LRX, 130 TSX and 140 Partitions, what velocities do you think I'll get?
Alan
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Joined: Jan 2007
Posts: 35,900
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
Guessing 2800-2900 with the 127's; 2750-2800 with the 140's.
Blown out should make it about like a 256 Newton or 6.5/06 I'm guessing (?).So maybe a skosh more(?).
This off the top of my head. Maybe someone can do the math with capacity etc.
It sounds like a 6.5x57 Improved.
Sounds like fun!
Last edited by BobinNH; 09/28/15.
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Jun 2011
Posts: 10,965 Likes: 74
Campfire Outfitter
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Campfire Outfitter
Joined: Jun 2011
Posts: 10,965 Likes: 74 |
If it has the case capacity of a 6.5-'06:
The new wave around here with the advent of the 6.5 SAUM, it to run a 6.5-'06
Same velocities with the 140's without the brass prep/sourcing problem.
Two of my buddies finished RU and 3rd in the Steel Safari running the 6.5-'06, H-1000, and 140 Berger Hybrids at the speed limit...
3170 fps...
The people wringing their hands over Trump's rhetoric don't know what time it is in America.
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Joined: Sep 2005
Posts: 4,305 Likes: 3
Campfire Tracker
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OP
Campfire Tracker
Joined: Sep 2005
Posts: 4,305 Likes: 3 |
Rick,
I'd say case capacity is about 1/2 way between a 260 and an '06 case.
Alan
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Joined: May 2011
Posts: 891
Campfire Regular
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Campfire Regular
Joined: May 2011
Posts: 891 |
I was thinking along the lines of Bob and the 6.5x57mm as a basis for velocities. Granted I don't know the details of the 57BR, but Quickload indicates 2900 fps with the 140 partitions isn't a hot load so I would think the blown out shoulders would allow 2900 fps with no issues.
I'm thinking this case geometry could take advantage of the slower burning powders for the heavy 6.5 bullets...like people do with the 6.5 Swede.
Sounds like a cool round!
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Joined: Dec 2009
Posts: 70
Campfire Greenhorn
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Campfire Greenhorn
Joined: Dec 2009
Posts: 70 |
Two of my buddies finished RU and 3rd in the Steel Safari running the 6.5-'06, H-1000, and 140 Berger Hybrids at the speed limit...
3170 fps...
Barrel length?
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Joined: Feb 2003
Posts: 10,435 Likes: 7
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2003
Posts: 10,435 Likes: 7 |
My new 6.5-06 has been to the range 10 times in the last 4 weeks.
9-23-2015 range report: 120 gr Nos Bal tip moly with 50.7 gr IMR-4166 powder 3.34" , Win 30-06 brass, that QL estimates at 3236 fps 65 kpsi using IMR-4895 in the QL library. Chronographs at 3197 fps Averages 0.92" 5 shots at 100 yards
8-22-2015 range report 6.5-06 Quickload predicted 2977 fps 67kpsi 142 gr Nos Accubond long range, 54 gr H4350, 3.34" 24" barrel Chronographs at: 2982 fps 2956 fps 2873 fps
*That jug of H4350 is usually 4% slower than the H4350 in the QL library, but the bullet jammed into the lands has higher start pressure and offsets the slow jug.
*That jug of IMR-4166 is right on the money with a couple of cartridges using the IMR4895 constants in the QL library.
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway The man who makes no mistakes does not usually make anything.-- Edward John Phelps
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Joined: Aug 2010
Posts: 48,407 Likes: 51
Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
Posts: 48,407 Likes: 51 |
Going to throw together a Rem 700 LA i've had for some 33 years, a 24" #3 Hart fluted barrel and set it down in a D'Arcy Echols Shrike stock. Caliber? Dave Kiff calls it the 6.5x57BR. Lapua 8x57 brass, necked down to 6.5mm and shoulder blown out to 30 deg. Running Barnes 127 LRX, 130 TSX and 140 Partitions, what velocities do you think I'll get?
Alan 2,989 fps for the 127 LRX and 130 TSX 2,875 for the 140 partition...
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Joined: Feb 2010
Posts: 17,927
Campfire Ranger
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Campfire Ranger
Joined: Feb 2010
Posts: 17,927 |
Custom rifle, wildcat handloads, and no chrono?
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Joined: Nov 2002
Posts: 33,845 Likes: 21
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2002
Posts: 33,845 Likes: 21 |
Where did you get that? He is asking, prior to the build, what velocities he might see.
Conduct is the best proof of character.
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