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Thread: Bullet Production and Quality Control

  1. #1
    Join Date
    Aug 2004
    Location
    NY State
    Posts
    157

    Bullet Production and Quality Control

    Rcently I purchased 500 bullets from a boutique specialist maker all of which were marked 105 gr

    I found that loading them in my seating die led to inconsistent OAL measrements

    I randomly selected 20 bullets of the 500 and weighed them

    Of the 20, 13 were 104.9-105.2gr

    Then measured the base to ogive on a bullet comparator, and the same 20 bullets had a range of .0040 (55-95 thou)from shortest to longest at the ogive ( distribution was bimodal at 25 and 95 thou)

    Questions:
    1. Is this normal and acceptable?

    2. Is my expectation for more consistency unreasonable?

    3. If this is normal , how do you insure every seating is exact to the OAL for your chamber where it shoots most accurately? Must you seat long and creep up on the measurement?

    Your expertise and vast experience are most appreciated.

  2. #2
    Join Date
    Jul 2005
    Posts
    739
    Quote Originally Posted by fx77 View Post
    Rcently I purchased 500 bullets from a boutique specialist maker all of which were marked 105 gr

    I found that loading them in my seating die led to inconsistent OAL measrements

    I randomly selected 20 bullets of the 500 and weighed them

    Of the 20, 13 were 104.9-105.2gr

    Then measured the base to ogive on a bullet comparator, and the same 20 bullets had a range of .0040 (55-95 thou)from shortest to longest at the ogive ( distribution was bimodal at 25 and 95 thou)

    Questions:
    1. Is this normal and acceptable?

    2. Is my expectation for more consistency unreasonable?

    3. If this is normal , how do you insure every seating is exact to the OAL for your chamber where it shoots most accurately? Must you seat long and creep up on the measurement?

    Your expertise and vast experience are most appreciated.
    There is a reason they producer is a "boutique specialist."
    Stick with one of the larger BR grade makers.


    They are no inexpensive, but very, very consistent.
    Sound like equipment being run to fast.
    It takes a non-zero time for the lead core to flow to the die shape when swaging.

  3. #3
    Join Date
    Oct 2019
    Posts
    843
    are these HAND MADE, or machine made?
    one of the best out there, vapor trail sells both, one for prs, one for benchrest.

  4. #4
    Join Date
    Mar 2003
    Location
    Carrollton Mo.
    Posts
    463

    bullet assembly

    The weight doesnt look bad to me but the length to ogive could be alot better. Never put bullets together at Lake City but they said it was alot harder to do than case area stuff like I did. Sounds like quality control was asleep to. What the hell is a boutique specialist anyway? Theres your sign. Doug

  5. #5
    Join Date
    Feb 2019
    Posts
    731
    I donít know, nor do I need to know, who your boutique bullet maker is but I find the opposite to be true regarding weight and length variation when compared to manufactured bullets. There may be variation from lot to lot but who mixes lots? Manufacturers run four or five lines at the same time and call that all a lot. My bullets from a hand made bullet supplier all come off the same press at the same time and that is a lot number.

  6. #6
    Join Date
    Sep 2003
    Location
    Oriental, NC
    Posts
    1,057
    Quote Originally Posted by FBecigneul View Post
    I donít know, nor do I need to know, who your boutique bullet maker is but I find the opposite to be true regarding weight and length variation when compared to manufactured bullets. There may be variation from lot to lot but who mixes lots? Manufacturers run four or five lines at the same time and call that all a lot. My bullets from a hand made bullet supplier all come off the same press at the same time and that is a lot number.
    I'm familiar with several bullet manufactures and only one runs multiple presses for the same bullet. Think Gov contracts. They may or may not mix bullets from different presses. I doubt it as that leads to complications in making the same bullet in different die sets. Larger lots that are in Gov spec from one press absolutely. Mixed not likely.

  7. #7
    Join Date
    Aug 2004
    Location
    NY State
    Posts
    157
    These answers made me do a comparison

    Berger bullets 105 gr 6 mm had one half the variability of weight compared to my other brand (15/20 were exactly 105.0, 3/20 were 104.9, and 2/20 were 105.1 gr) and length from ogive to base was on the money for measurements to 0.0005 and only 7/20 from the box of 500 that I measured were less than the others by .0005" and none was greater. Admittedly this was not free of Alpha or Beta error and was not power tested , but just an observation

    But seems a large commercial product is satisfactory and in one case more reliable.

  8. #8
    Join Date
    Feb 2003
    Location
    Fresno
    Posts
    5,594
    Quote Originally Posted by fx77 View Post
    Rcently I purchased 500 bullets from a boutique specialist maker all of which were marked 105 gr

    I found that loading them in my seating die led to inconsistent OAL measrements

    I randomly selected 20 bullets of the 500 and weighed them

    Of the 20, 13 were 104.9-105.2gr

    Then measured the base to ogive on a bullet comparator, and the same 20 bullets had a range of .0040 (55-95 thou)from shortest to longest at the ogive ( distribution was bimodal at 25 and 95 thou)

    Questions:
    1. Is this normal and acceptable?

    2. Is my expectation for more consistency unreasonable?

    3. If this is normal , how do you insure every seating is exact to the OAL for your chamber where it shoots most accurately? Must you seat long and creep up on the measurement?

    Your expertise and vast experience are most appreciated.
    If I had that sort of variation from any bullet maker, factory or boutique, I would demand a refund, or replacement. That is totally unacceptable.

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