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Joined: Dec 2001
Posts: 6,273 Likes: 205
Sidelock
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OP
Sidelock
Joined: Dec 2001
Posts: 6,273 Likes: 205 |
Refresh my memory. What maximum pressure , BAR or psi, should one use in a gun Proofed at 850 Bar ?
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Joined: Dec 2006
Posts: 629 Likes: 1
Sidelock
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Sidelock
Joined: Dec 2006
Posts: 629 Likes: 1 |
Daryl, Go to http://www.bandpusa.com product information then speed and pressure charts. They have a list of charges and pressures in both bar and psi that one can orient oneself from.
Last edited by Sliver; 02/04/09 04:01 PM.
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Joined: Dec 2001
Posts: 12,743
Sidelock
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Sidelock
Joined: Dec 2001
Posts: 12,743 |
850 Bar converts to 12,328psi. I believe a service load should not exceed 75% of the proof load or about 9,246psi.
Miller/TN
I Didn't Say Everything I Said, Yogi Berra
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Joined: Jan 2006
Posts: 9,430 Likes: 315
Sidelock
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Sidelock
Joined: Jan 2006
Posts: 9,430 Likes: 315 |
Please see http://www.16ga.com/forum/viewtopic.php?t=3428"BOTTOM LINE: ANY 850 BAR (proof) = 650 BAR service or 3 TON service gun should be fine at pressures under 8500 psi, or 3 1/4 tons less than 9,500 psi."
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Joined: Dec 2001
Posts: 6,273 Likes: 205
Sidelock
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Sidelock
Joined: Dec 2001
Posts: 6,273 Likes: 205 |
2-piper, thanks. I do see the B and P chart, and I think that's great. I was just having trouble remembering the service load.
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Joined: Dec 2006
Posts: 629 Likes: 1
Sidelock
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Sidelock
Joined: Dec 2006
Posts: 629 Likes: 1 |
If I remember correctly, the new rules of proof ('89) show a testing pressure measured in bar that should be 60% higher than the usable pressure. This is from the recent article published in SS, the number before last.
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Joined: Jan 2002
Posts: 11,383 Likes: 106
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 11,383 Likes: 106 |
Straight from the British proof house, they're still using crusher bars--which means you can't convert x 14.5. They say that max service pressure for an 850 bar gun is about 10,700 psi, or around 1,000 psi lower than the SAAMI max--which reinforces the need to avoid standard American factory ammo. But you can do a whole lot with reloads. I stay way on the safe side with my target stuff, no more than 7,000 psi and often a whole lot less. Even the 1 1/8 oz field load I use on occasion is only 7300 psi.
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Joined: Dec 2001
Posts: 6,273 Likes: 205
Sidelock
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Sidelock
Joined: Dec 2001
Posts: 6,273 Likes: 205 |
Thank you all. That's a great help.
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