Choke tube ID

JIM STARK

May 25, 2002 18:20

I just arrived home from an out of town gun show...Bought a Rem. 1100 barrel with a choke tube.. supposed to be a "Colonial Arms" tube. I removed it and tried remchoke, accu-choke and berretta tubes.... None come even close. The tube in it is marked "ITC" "SF" in what looks like white paint or ink. I looked in Brownells, and couldn't seem tomatch any of the Colonial Tubes found there with the one in my hand...HELP PLEASE!!!!!!!!!! Thanks....

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  BT99

  May 25, 2002 20:20

  Have you mesured the choke tube. Colonial 12 ga. standard is
  .794 x 44. Colonial thinwall is .774 x 44. First thing you need
  to do is put a micrometer on it to measure outside diameter, and then
  measure thread pitch. The ITC on yur tube, I never heard of, but
  the SF would most likely mean "super full". If the barrel has in
  fact been machined for Colonial tubes, other factory tubes will not
  fit. A machine shop or good gunsmith could measure this for you if you don't have the equipment. I used the term "good gunsmith",
  because I know of some that couldn't read a yard stick, let alone
  a micrometer.

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  LSandBinc

  May 26, 2002 06:36

  If these are aftermarket threads in you barrel, they could be Tru-Choke. Which could be what the TC of ITC stands for. Tru-choke threads are the .795x44 or .774x44 that BT99 spoke of, for 12 gauge, if this is a 20 they would be.675x44.
  The I might be a brand name but the only ones I can think of are Colonial Hastings and Carlson's.
  Hope this sheads some light,
  Alan

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