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Choke tube ID

JIM STARKJIM STARK Member Posts: 1,150 ✭✭✭
edited May 2002 in Ask the Experts
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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Comments

  • BT99BT99 Member Posts: 1,043 ✭
    edited November -1
    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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  • LSandBincLSandBinc Member Posts: 216 ✭✭✭
    edited November -1
    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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