How to measure shoulder bump

Discussion in 'Reloading Forum (All Calibers)' started by P1ZombieKiller, Aug 26, 2018.

  1. P1ZombieKiller

    P1ZombieKiller Gold $$ Contributor

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    I was asked by a guy today how to measure shoulder bump. So I figured it was easier to use video to show him instead of trying to use words to explain it.

     
  2. kneedtospeed

    kneedtospeed Silver $$ Contributor

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    Was it f guffey?
     
  3. Someoldguy

    Someoldguy Silver $$ Contributor

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    One thing about answering questions. You find out just how much or how little you know about the subject real quick like.
     
  4. Dusty Stevens

    Dusty Stevens COVFEFE Gold $$ Contributor

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    I miss guffey
     
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  5. ClassCat

    ClassCat Unlimited Gold $$ Contributor

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    All well and good. Take it one step further. If you own your own reamer as i do, have your gunsmith cut a shoulder gauge using your reamer. A Perfect fit EVERY TIME.
     
    Last edited: Aug 27, 2018
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  6. Toby Bradshaw

    Toby Bradshaw Gold $$ Contributor

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    Hold a little more into the wind.
     
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  7. mikecr

    mikecr

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    The only die I've seen coming with a shoulder gauge is Tubb's. Not sure what other dies are coming with these.
    I have gizzys made with barrel finishing (my reamers).
     
  8. P1ZombieKiller

    P1ZombieKiller Gold $$ Contributor

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    Harrels makes my 30br and 6br dies. They come with one. I also had someone make me a few a while back for some of my other calibers, but I forgot who.... Paul something if I recall.....
     
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  9. JimSC

    JimSC

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    nice video

    I use a simple method when setting up a die. I check the fired cases against a GO gage and adjust till they are the same using a Hornady datum comparator. Seems to work out fine as far as brass life
     
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  10. mikecr

    mikecr

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    Ok, in your video you say "when you get your die, alot of times you get a shoulder bump gauge".
    Pretty sure that needed qualification.
    After all, the big red/green/blue companies sell about ~1,000 to 1 Harrells, and I don't think they come with side gauges.
     
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  11. P1ZombieKiller

    P1ZombieKiller Gold $$ Contributor

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    You are correct..... That statement in itself is not entirely factual.
     
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  12. Dusty Stevens

    Dusty Stevens COVFEFE Gold $$ Contributor

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    Harrels and whidden comes with them as well as every custom made die. Get your gunsmith to make you one from an old barrel piece. He dont have to have your reamer he just needs the same case reamer to be good enough. I like the custom made ones because of the full shoulder contact instead of just a datum circle hitting the shoulder like a hornady or whidden. The harrels has the full shoulder
     
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  13. JimSC

    JimSC

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    I can see that, with a full shoulder it is easier to get a accurate reading. The case can canting in a simpler gage, I do a workaround on that by spinning the case when it is in the gage, that helps the caliper to get parallel with the case head but a full shoulder would make it simpler
     
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  14. rwj

    rwj Silver $$ Contributor

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    Great advice and I will request my smith to make one at the next barrel replacement. Until then, I’m using the spring loaded sleeve from my Redding seating die for shoulder gauging.
     
  15. brians356

    brians356 Gold $$ Contributor

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    Hey, did you hear the one about ...

    Two Linear Econometrists were deer hunting. One, the hunter, had the rifle, the other was spotting with binoculars. Lo and behold they saw a nice buck on a hillside quite some distance away. The hunter aimed and fired, kicking up dust three feet to the right of the buck, but with good elevation. "Three feet right!" exclaimed the spotter. The hunter compensated and fired again. This time the dust kicked up three feet to the left of the buck. "Got him!" exclaimed the spotter.
    -
     
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  16. GSPV

    GSPV A failure to plan is a plan for failure. Gold $$ Contributor

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    Two points:

    1. Get a bump gauge / gizzy.

    2. Don’t measure one or two and call it done. The shoulders don’t seem to work harden at the same rate. I don’t know why. It’s just an observation. I don’t want to really have something going and chamber a round that feels a little different. Ruins the moment.
     
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  17. yukonal

    yukonal Silver $$ Contributor

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    A point to remember when measuring this way...make sure you have already punched the primers before using the calipers.

    A primer sticking out a tad will give you a false measurement.
     
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  18. Chris Covell

    Chris Covell

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    THANKS WES!!!
     
  19. Someoldguy

    Someoldguy Silver $$ Contributor

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    I saw a post of his yesterday.
     
  20. dickn52

    dickn52 Gold $$ Contributor

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    Whidden
     
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