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mike wiskey / others ?

260260 Member Posts: 1,133 ✭
edited January 2014 in Ask the Experts
customer brought in 1100 with broke link. got new part and tore down , cleaned, etc. now i noticed the receiver has an M in the prefix of ser # but the barrel says 2-3/4 . with bolt in, the barrel will not go in far enough to install mag cap but will with bolt out. what gives here??
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Comments

  • TRAP55TRAP55 Member Posts: 8,294 ✭✭✭
    edited November -1
    260, The M serial "prefix" means made in 1974. The M "suffix" means 12ga 3" Magnum.
    The barrel won't install unless the bolt is retracted and locked back. If it only seats when the bolt is removed, something else is broke.
    The link rarely fails, the only two I've seen that crossed my bench, was from shooting 3" mags in a 2.75" barrel.
    One was from a rusted out action tube and spring, that a 3" finished off.
    The other was from a moron that thought because he had a magnum frame, it would still shoot 3" magnums with a 2.75" bbl. The whole inside of that receiver was beat to hell.
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  • MIKE WISKEYMIKE WISKEY Member Posts: 10,047 ✭✭✭✭
    edited November -1
    as above. I have seen links bend/break but only because of lack of maintanence or overloading (3" in a 2 3/4" chambered barrel)
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  • 260260 Member Posts: 1,133 ✭
    edited November -1
    [:I] got it solved . the link wasn't properly installed in the action spring follower. works fine now. guess this proves that you shouldn't be working when your just tired and wore out. thanks guys [;)]
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  • JIM STARKJIM STARK Member Posts: 1,153 ✭✭✭
    edited November -1
    Just as an aside to the OP...The depth of a 2-3/4"chamber (in the barrel) is 3".. This is to allow the 2-3/4" shell to open up when fired.. The chamber on a 3" barrel is 3-1/4" deep to allow the 3"
    shell to open up... Depending upon the dia. of the forcing cone, A 3' shell will not open all the way... With this condition, pressures are increased... And with that in mind the 2-3/4" barrel has more than twice the area of gas ports which allows much more pressure in the gas system to move the bolt... Hence 3" shells in a 2-3/4"barrel will create havoc on the back side of the bolt and sometimes ruin the receiver...
    Been there seen that, several of my customers just don't pay attention..
    JIM.......
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