Barrel thread pitch on a BSA .310 Rook

Kopperl

September 26, 2011 15:14

Would someone please tell me what the barrel thread is on a BSA Martini .310? Mine has been rebarreled to .32 Winchester. I would like to change it to a smaller calibre.
Thank you.

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  Sreload

  September 26, 2011 19:34

  14 threads per inch. .750 dia. .659 long

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  SoreShoulder

  September 26, 2011 19:45

  Whitworth threads are 55 degrees. Does anyone know if BSA threads are also a proprietary angle instead of 60 degrees?

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  martinicadet

  September 26, 2011 22:02

  I just threaded a barrel for one, they're 60 degree.

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  Kopperl

  September 27, 2011 06:20

  Thank you all very much.

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  MIKE WISKEY

  September 27, 2011 17:16

  yup, one nice thing about the brits., almost all threads are sae fine thread

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  richarda

  September 28, 2011 06:25

  All the Cadet Martini's i've seen in .32 Win. Special had been rechambered .310's, not rebarreled. I myself had a .310 rechambered to .32-40; works fine.
  
  If you have your rifle rebarreled (or relined) to something that takes the Small Rifle Primer, you should have the firing pin hole bushed smaller, and the pin reduced to match.

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