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doubleriflejack
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Reged: 11/11/07
Posts: 352
Loc: Oregon, U.S.A.
Question, Graeme Wright book, second edition data
      #134176 - 02/05/09 06:26 AM

I have Graeme Wright's first edition book, but not his second edition, the edition I believe is now available? Did he give any indication of data on pressure tests done on .577 Black Powder express cartridges, and if so, what were the presssures that resulted, and the bullet weights that was done for?

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DGR375
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Reged: 04/10/07
Posts: 131
Loc: Gold Coast, QLD
Re: Question, Graeme Wright book, second edition data [Re: doubleriflejack]
      #134186 - 02/05/09 08:50 AM

1)for 2 3/4 inch .577 BPE, with 160 gr black powder, and 520 gr lead bullet, in 28 in barrel, 10 tons pressure, for 1725 fps, and 3440 ft.lb energy
2)for 3 inch .577 BPE,with 167 gr black powder, and 570 gr lead bullet, in 28 in barrel, 10 tons pressure, for 1725 fps, and 3770 ft.lb energy

Hope this helps

PS The 3rd edition will be out soonish

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DGR375
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Reged: 04/10/07
Posts: 131
Loc: Gold Coast, QLD
Re: Question, Graeme Wright book, second edition data [Re: DGR375]
      #134188 - 02/05/09 08:55 AM

The above date was from appendix 3, page 167, which is made from extracts from four old ammunition catalogues. In his chapter on nitro for black loads he does list suggested loads, but does not give data for pressure.

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