utectok Posted June 17, 2011 Report Share Posted June 17, 2011 Just wondering I thought that the proof for 3 1/2" shotguns was less than the proof for high performance steel (1050bar?). Am I wrong tho? Thanks Quote Link to comment Share on other sites More sharing options...
poontang Posted June 17, 2011 Report Share Posted June 17, 2011 (edited) I'm sure you'll find all 3.5" chambered guns are proofed for high performance steel, and will be marked accordingly with a fleur de lys symbol or stamped Steel Shot. More info here: http://www.chircuprodimpex.com/products/ecological-steel-shot-for-hunting/steel-shot-what-you-need-to-know.pdf Edited June 17, 2011 by poontang Quote Link to comment Share on other sites More sharing options...
utectok Posted June 17, 2011 Author Report Share Posted June 17, 2011 Well don't think mine is? 2000 model tho. I read 3.5" guns were proofed to normal load of about 960bar and hp steel is 1050 bar right? Quote Link to comment Share on other sites More sharing options...
Beretta28g Posted June 18, 2011 Report Share Posted June 18, 2011 (edited) HP steel is 1380 bar. A traditional magnum load is 1200 bar. Spanish magnum is 1000 Bar. Standard proof is think 960 Bar. ONLY USE HP STEEL IN GUNS PROOFED TO 1380 BAR NOT LESS Try these links http://www.gamebore.com/page.php?id1=15 The BASC fact sheet, you wil need a pdf reader. http://www.chircuprodimpex.ro/produse/alice-ecologice-pentru-vanatoare/cip-regulations-on-steel-shot-ammunition.pdf Edited June 18, 2011 by Beretta28g Quote Link to comment Share on other sites More sharing options...
utectok Posted June 18, 2011 Author Report Share Posted June 18, 2011 well both my 3" OU and my 3.5" SA say KG 1,310 not sure what this means is that a proof pressure?? Although I realize the difference between HP steel and standard steel (which I shoot allot of) And I also realize you need proof marks for HP steel I was just wondering what the proof pressures are for 3.5" guns. ie I think 2 3/4" and 3" have the same proof pressures here is what I read "SAAMI Shotgun Pressure Specifications (Maximum Average Pressure in PSI) All Piezo measurements unless specified) Cartridge Maximum Average pressure 10 gauge 11,000 (all) 12 gauge 11,5000 = 792 bar (all but 3 1/2" mag) 12 gauge 3 1/2" mag 14,000 =965 bar 16 gauge 11,500 (all) 20 Gauge 12,000 (all) 28 gauge 12,500 (all) .410 Bore 2 1/2" 12,500 .410 Bore 3" 13,500" My italics from http://www.duckhuntingchat.com/forum/viewtopic.php?f=14&t=98131&start=0 So to wit a 3.5" chamber is less than HP steel. Or I might be wrong Cheers Will Quote Link to comment Share on other sites More sharing options...
Guest cookoff013 Posted June 20, 2011 Report Share Posted June 20, 2011 i believe the cip are using mPa as a perssure unit, via a transducer. i`d stick to PSI with the loads i make, the psi for 12gauge is 11,500psi for normal 12gauge and 14,000psi for 3.5" 12gauge only. however i tend to like my loads at 10,000psi. what the gun is proofed for is exactly that, what the gun is proofed to, fabarm make there waterfowl o/u at 1600bar or 22,000psi. that is very strong. as these numbers mean very little to the average shooter, all ammunition sold and manufactured (legally) in the uk, must conform to the cip proof standards. non cip cartridges are manufactured in the uk, but are exempt from sale in the uk (or any country that the cip mandate is enforced). google cip, and you`ll have it from the horses mouth. Quote Link to comment Share on other sites More sharing options...
utectok Posted June 20, 2011 Author Report Share Posted June 20, 2011 Thanks I'll do that,! Quote Link to comment Share on other sites More sharing options...
poontang Posted June 20, 2011 Report Share Posted June 20, 2011 Well don't think mine is? 2000 model tho. What gun are you using? Quote Link to comment Share on other sites More sharing options...
utectok Posted June 20, 2011 Author Report Share Posted June 20, 2011 What gun are you using? That's my new benelli sbe SA Quote Link to comment Share on other sites More sharing options...
poontang Posted June 21, 2011 Report Share Posted June 21, 2011 That's my new benelli sbe SA You can chuck 3.5" steel through that all day long Quote Link to comment Share on other sites More sharing options...
wymberley Posted June 21, 2011 Report Share Posted June 21, 2011 well both my 3" OU and my 3.5" SA say KG 1,310 not sure what this means is that a proof pressure?? Although I realize the difference between HP steel and standard steel (which I shoot allot of) And I also realize you need proof marks for HP steel I was just wondering what the proof pressures are for 3.5" guns. ie I think 2 3/4" and 3" have the same proof pressures here is what I read "SAAMI Shotgun Pressure Specifications (Maximum Average Pressure in PSI) All Piezo measurements unless specified) Cartridge Maximum Average pressure 10 gauge 11,000 (all) 12 gauge 11,5000 = 792 bar (all but 3 1/2" mag) 12 gauge 3 1/2" mag 14,000 =965 bar 16 gauge 11,500 (all) 20 Gauge 12,000 (all) 28 gauge 12,500 (all) .410 Bore 2 1/2" 12,500 .410 Bore 3" 13,500" My italics from http://www.duckhuntingchat.com/forum/viewtopic.php?f=14&t=98131&start=0 So to wit a 3.5" chamber is less than HP steel. Or I might be wrong Cheers Will As no one has mentioned your specific figure of 1310 and although you mention two different barrels, could by any chance/coincidence that be the barrel weight? Quote Link to comment Share on other sites More sharing options...
Guest cookoff013 Posted June 21, 2011 Report Share Posted June 21, 2011 i think that may be the pressure the gun will fail upon a single firing. but i`m just guessing. Quote Link to comment Share on other sites More sharing options...
wymberley Posted June 21, 2011 Report Share Posted June 21, 2011 i think that may be the pressure the gun will fail upon a single firing. but i`m just guessing. How do they test that? Quote Link to comment Share on other sites More sharing options...
Guest cookoff013 Posted June 21, 2011 Report Share Posted June 21, 2011 in a factory behind glass. this is done when the gun is in the developmental stage, before mass production. they manufacture test cartridges that are high pressure of a known pressure. they also test proof barrels to calibrate them, they have a 7000psi load, 9000psi load and 12000psi load. any load that is not in the range to these are either lower than 7000psi, or excess of 12,000. i think there is another test for 3.5" loads that have 14000psi as the maximum. proof houses have their own test reference cartridge manufacturing, after several proofed barrels blew up, due to proofing errors.... intresting stuff. Quote Link to comment Share on other sites More sharing options...
wymberley Posted June 21, 2011 Report Share Posted June 21, 2011 in a factory behind glass. this is done when the gun is in the developmental stage, before mass production. they manufacture test cartridges that are high pressure of a known pressure. they also test proof barrels to calibrate them, they have a 7000psi load, 9000psi load and 12000psi load. any load that is not in the range to these are either lower than 7000psi, or excess of 12,000. i think there is another test for 3.5" loads that have 14000psi as the maximum. proof houses have their own test reference cartridge manufacturing, after several proofed barrels blew up, due to proofing errors.... intresting stuff. Thanks for that, as you say, interesting. I just thought that anything stamped on a gun relating to proof applied to that one individual gun only. As the Italians stamp the barrel weight in Kgs on their guns, I thought that's what it may have been. Cheers Quote Link to comment Share on other sites More sharing options...
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