Sinclar Hexagon bullet comarator

Discussion in 'Reloading' started by Firearrow, Jun 5, 2010.

  1. Firearrow

    Firearrow Well-Known Member

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    Just got Sinclar's hexagon bullet comparator and I am not sure if this unit is messed up, or it might be me, but I am getting a wide range of messurments from the same bullet. Has anyone had this proble, is it user error, any suggestions?

    I was thinking about getting Sinclar's regular comparator but was told not to becasue I am loading the rounds to mag length or less. Any advice on this?

    Garett
     
  2. boomtube

    boomtube Well-Known Member

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    The hex nut is solid steel. Your caliper is also steel. Your "same" bullet doesn't vary. Might be operator error?

    How magazine length could have any effect on loading ammo with a "regular" comparitor I have no idea.
     

  3. Firearrow

    Firearrow Well-Known Member

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    I thougth it was operator error, just didnt want to admit it. As for the other comparator, just wanted to check with someone else. Could not think of how it would matter if it was bigger or smaller than mag length.
     
  4. jmden

    jmden Well-Known Member

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    I use these as well and I just think it's a real 'feel' thing that after doing it a bit, you get the hang of it. Requires a good deal of consistency on the loader's part to get consistent readings.
     
  5. royinidaho

    royinidaho Writers Guild

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    I use one and have had to 'learn' how to use it. Over time I have developed a "touch" which works well. Before the 'touch' development there was plenty of operator error.

    First and foremost the durn thing doesn't measure 1.000" across. Mine is 0.996" so when measuring base to ogive I zero the digitals on the nut and measure from there. I don't care about the overall length just the length from the base to ogive. I don't know if the "nut" is accurate for this purpose but things work out well from the reference point determined.

    Practice measuring the width of the thing working on your 'feel' and moving the 'nut' around in the caliper jaws. I'm assuming you are using a caliper to measure overall length.

    My calipers aren't the most expensive. Heck they may be the cheapest.:rolleyes: My dial doesn't agree with my digital and I don't know which one is correct.:rolleyes: But the differences in measurements are consistent.

    When measuring bullet bearing length wiggle the bullet until it has no more wiggle. Then measure and repeat the measure.

    When measuring a seated bullet do the same thing but now you have to figure out how to hold the darn thing in the jaws. T'was a bit of a challenge until I learned to lay the "nut" with bullet and cartridge horizontal.

    Then you learn that the head of the cartridge drops to the same level as the bottom of the "nut". A bad thing. Rig up something to hold the cartridge head so that the flash hole is centered on the caliber hole in the nut. (There's a better way to explain that but I don't know how.......)

    Then when things are level/plumb/etc move the nut and cartridge head in the jaws until you get the smallest reading.

    After awhile you catch on and it becomes easier and repeatable.

    Good luck and have fun.
     
  6. gunaddict

    gunaddict Well-Known Member

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    I bought the sinclair hexagon bullet comparator and didn't like it. Seems like I had the same trouble getting different reading. So I bought the stoney point insert style bullet comparator and it works great. Sinclair hadn't came out with the insert style when I bought the stoney point.
     
  7. Firearrow

    Firearrow Well-Known Member

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    Thank god I was not the only one that was having a problem. Think I might give it a go for a while, but CA hunting seasons is getting close. Might need to get the Hornady LNL, or the other sinclar style.

    Any one know why I would not be able to use the non Hex style to messure mag length loads? I just noticed in the description it states not for mag length or shorter loads. Thanks.
     
  8. gunaddict

    gunaddict Well-Known Member

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    I use the insert style comparator measuring from the back of case to the bullet ojive. I use the comparator from 223 to 338 ultra. The comparator is not used as a method to find magazine length.
     
  9. Firearrow

    Firearrow Well-Known Member

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    I know it is not used to find magazine length. The caption reads above the comparator " not used for magazine length seating deapths or smaller ". I can't understand why it would say this.
     
  10. Fitch

    Fitch Well-Known Member

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    If all you are trying to do is make sure the loads fit in the magazine, you don't need the hex tool, just measure the overall cartridge length with your calipers.

    I don't know why they would say "not used for magazine length ..." unless the bullet was such that the ogive diameter where the hex tool would contact would be back in the brass. That happens with some bullets in my Hornet.

    Fitch
     
  11. Short Round

    Short Round Member

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    I think you can induce variance with the sinclair nut if you aren't consitent with the amount of force/pressure used. You're pressing a copper object into a chrome plated sharp corner. If you can see a ring in the copper jacket you moved the copper metal.

    That said, keep things square to the caliper jaws and be consistent in your pressure. I also wiggle things to get the shortest length.
     
  12. Boss Hoss

    Boss Hoss Well-Known Member

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    I sure do like my Buhay Tool for this task!!