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Thread: Roughing Reamer

  1. #16
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    Quote Originally Posted by brickeyee View Post
    Either way did he get an MRI machine or a CAT scanner?

    MRI and iron are NOT a good combination.

    They also do not tolerate less than continues use since the magnet takes days to cool down to superconducting.

    Turning on 'on end' would also be a large feat.
    ummmm, MRI, because magnets.......because the little clips don't fly away and get lost........ when you flik one it sticks to the side of the enclosure and you just pick it off and try again....

    cheaper that way....
    Last edited by alinwa; 10-14-2017 at 03:07 PM.

  2. #17
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    Quote Originally Posted by alinwa View Post
    ummmm, MRI, because magnets.......because the little clips don't fly away and get lost........ when you flik one it sticks to the side of the enclosure and you just pick it off and try again....

    cheaper that way....
    Wait til he gets his power and helium bills.

  3. #18
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    Good laff you guys....needed one today.

    Mort

  4. #19
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    Oct 2017
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    3

    Using roughing reamers

    I have been fitting barrels to 6mm PPC rifles and decided to get new reamers, a resize, roughing and finishing reamer, this time I used a roughing reamer for the first time to save the finishing reamer wear.
    The finishing reamer seemed to line up correctly after using the roughing reamer and seemed to run true to the barrel, BUT the accuracy of the barrels dropped off badly using a roughing reamer, then I did another barrel with out the roughing reamer and the accuracy came back, then rechambered one of the first barrels I used a roughing reamer in with out the roughing reamer and that accuracy came back, I am using a floating reamer holder both times.
    Some people do not use a roughing reamer for accuracy at all, this is the question I would like help with, what happened ?, 3 barrels using roughing reamer lucky to get .3s, no roughing reamer .1s, is it the floating reamer tool causing this, I will not be using the roughing reamer again, can some one tell me what went wrong with out just saying we don't use them, have you had trouble with this before on barrels, I would rather wear out a finishing reamer than have this again, thankyou for the help.
    Mark

  5. #20
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    Quote Originally Posted by alinwa View Post
    ummmm, MRI, because magnets.......because the little clips don't fly away and get lost........ when you flik one it sticks to the side of the enclosure and you just pick it off and try again....

    cheaper that way....

    And people in the bore of MRI have been killed by oxygen tanks that went in and struck them.

    A few have been killed by being struck in the head my objects pulled into the bore.
    Others have just been injured.

    Smaller objects not aligned with teh bore will just stop on the housing.

    Of course if your head was centered up ant that staple went down the bore it might be a little hard on your face or eye.

  6. #21
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    Quote Originally Posted by brickeyee View Post
    And people in the bore of MRI have been killed by oxygen tanks that went in and struck them.

    A few have been killed by being struck in the head my objects pulled into the bore.
    Others have just been injured.

    Smaller objects not aligned with teh bore will just stop on the housing.

    Of course if your head was centered up ant that staple went down the bore it might be a little hard on your face or eye.

    Whew, that part about getting mugged by an O2 tank definately gives one cause for pause eh.....my tank is AL for saves weight so's I should be OK...or maybe just get injured.....or maybe it'll fall really slow cuz eddy currents, cool! (I'ma' go pitch my tank down the hole, see what happens! If youtube is right I might have invented an aluminium parachute!)


    I keep my head perty centered up though after The Incident.... I first used this thing laying down, skidded in Injun Style on my butt (mine came with a busted loading ramp so's I gutted 'er out to a bigger bore)....my plan was to work the clips on my lap but WHEWWW!!! The steel pins holding my pelvic girdle together just WHAMMED my butt down and when I strained upwards the steel plate in my head attached itself to the other wall! So's I'm humping my way out (pain!!) and The Wife comes by, she's all "whaddaya' DOIN' with that thing?? You look like you got worms....."

  7. #22
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    As per usual Al, your sense of humor just slays me!

  8. #23
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    Quote Originally Posted by Mark t View Post
    I have been fitting barrels to 6mm PPC rifles and decided to get new reamers, a resize, roughing and finishing reamer, this time I used a roughing reamer for the first time to save the finishing reamer wear.
    The finishing reamer seemed to line up correctly after using the roughing reamer and seemed to run true to the barrel, BUT the accuracy of the barrels dropped off badly using a roughing reamer, then I did another barrel with out the roughing reamer and the accuracy came back, then rechambered one of the first barrels I used a roughing reamer in with out the roughing reamer and that accuracy came back, I am using a floating reamer holder both times.
    Some people do not use a roughing reamer for accuracy at all, this is the question I would like help with, what happened ?, 3 barrels using roughing reamer lucky to get .3s, no roughing reamer .1s, is it the floating reamer tool causing this, I will not be using the roughing reamer again, can some one tell me what went wrong with out just saying we don't use them, have you had trouble with this before on barrels, I would rather wear out a finishing reamer than have this again, thankyou for the help.
    Mark

    Did you look at the leade ramps at the end of the freebore? They should all be the same length. If they are uneaven (some longer than others) that barrel will not shoot accurately.

    .

  9. #24
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    Oct 2017
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    Roughing reamer problems

    Jerry

    Thanks for answering Jerry, when I finish a chamber I look over it with a bore scope before it comes out of the lathe, at the free bore for the reason you suggested, marks on the neck and body etc, everything seems perfect??? but there is a problem some where.
    The resizing die changed to a tighter one also after using the finishing reamer only, the barrels using my old reamer used the larger sizing die and shot like stink, just something weird happening, any more input would be great.
    Mark

  10. #25
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    Quote Originally Posted by Mark t View Post
    Jerry

    Thanks for answering Jerry, when I finish a chamber I look over it with a bore scope before it comes out of the lathe, at the free bore for the reason you suggested, marks on the neck and body etc, everything seems perfect??? but there is a problem some where.
    The resizing die changed to a tighter one also after using the finishing reamer only, the barrels using my old reamer used the larger sizing die and shot like stink, just something weird happening, any more input would be great.
    Mark
    Mark, were you using two different finish reamers when you got the two different results? Benchrest reamers only have about 0.004" difference between GO and NoGO where regular reamers have about 0.010" diff.

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    .

  11. #26
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    Oct 2017
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    Roughing reamer

    Jerry

    I used the same finishing reamer on both chambers, seating depths are the same to the go gauge exactly the same not +or- to 0.0005 they were zero exactly the same.
    I am wondering about the floating reamer holder causing the problem from roughing reamer to guiding the finishing reamer??
    Some people say they should not use a roughing reamer and I am wondering why, thanks for your input Jerry.

    Mark

  12. #27
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    Quote Originally Posted by Mark t View Post
    Jerry

    I used the same finishing reamer on both chambers, seating depths are the same to the go gauge exactly the same not +or- to 0.0005 they were zero exactly the same.
    I am wondering about the floating reamer holder causing the problem from roughing reamer to guiding the finishing reamer??
    Some people say they should not use a roughing reamer and I am wondering why, thanks for your input Jerry.

    Mark
    On One of the two chambers you should be able to feel some sideways movement with the bare reamer, with the pilot bushing removed, when the reamer is fully inserted. That chamber is the one in error.

    Being 0.002-0.005" oversized can effect the sizing die required but should not effect the accuracy.....unless your finish reamer is not cleaning up where the rougher cut. I.e. Your rougher may be cutting oversized.

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