doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com pressure of B&P F2 16ga 1 oz 67mm shell.

Anyone out there know the supposed chamber pressure of B&P 16ga 1 oz 67mm shell?

Their website shows 720 bar, which I think is approx. 10,400 psi.

Thanks

That's very close to standard service pressure for an 850 bar gun, which is 740 bar and which converts to 10,730 psi per the Birmingham Proofhouse.

For those of you inclined to do the math, 850 bar is proof pressure as measured with a lead crusher. Has to be converted to transducer figures before the math will work. 650 bar is typically given as service pressure for an 850 bar proof gun, but the 650 is a crusher figure, and actually 740 bar when converted to transducer measurements.

http://carolans.com/R/bp-1/content/Speed-and-Pressure-Chart.pdf
shows the 16g 29 gm F2 Classic at (transducer measured) 680 Bar = (calculated) 9,867 psi

This is an old B&P USA chart however.
CPA: could you please post the link to your chart?

And to confuse thing further, I found in my files a 2001 report from Tom Armbrust reporting 28gm B&P "Classic" (F2?) at 1274 fps and 10,500 psi

Drew,

Pretty sure this is the data to which cpa was referring.

http://www.baschieri-pellagri.com/en/catalogo/cartucce+da+caccia/1/1/16.aspx

That's it.

Their sleeper load is the 7/8 Comp1's.

It should be obvious that in a commercial cartridge, it's nigh impossible to get to 1300fps and keep pressures down. I've quit looking for them.