close

Privacy guaranteed - Your email is not shared with anyone.

Welcome to Glock Talk

Why should YOU join our Glock forum?

  • Converse with other Glock Enthusiasts
  • Learn about the latest hunting products
  • Becoming a member is FREE and EASY

If you consider yourself a beginner or an avid shooter, the Glock Talk community is your place to discuss self defense, concealed carry, reloading, target shooting, and all things Glock.

155 gr Gold Dots AA#7 results a little slow!

Discussion in '10mm Reloading Forum' started by alpha6164, Sep 13, 2010.

  1. alpha6164

    alpha6164 alpha6164

    25
    0
    Feb 16, 2009
    Jacksonville, FL
    I loaded some Speer GD 155gr over AA#7 this weekend and was a little disappointed with the velocity. COA 1.255", 80deg, Win LG primer (non-mag)

    Lone Wolfe 5.15" Tactical barrel

    12.0gr= 1225,1216,1263,1265
    12.3gr= 1280,1329,1238,1269
    12.7gr= 1239,1298,1272,1276
    12.9gr= 1396,1338,1321,1351


    These charges were weighed by hand individually so not thru a powder measure. What i cant understand is how the velocity is essentially unchanged from 12.3 to 12.7gr. Accurate lists 12.7gr at 1379ft/sec. I had to go to 12.9gr and my average still is not 1379ft/sec. Also, there were no pressure signs at all with any of the above loads.

    I checked chrono with other ammo and factory ammo and it was spot on.
     
    Last edited: Sep 13, 2010
  2. AZBru88

    AZBru88

    1,328
    0
    May 21, 2010
    Arizona
    Alpha a lot of guys say when you get up to heavy loads they shine with a heavier spring. It gives the round a micro second to burn more powder before opening the slide. Might give it a try see if you see a difference.

    Sorry forgot to add where in your chrono set up. Most feel 15' away gives the best readings, that way no powder blast effect on the reading. Just what I've been reading on the threads...Bru
     

    Last edited: Sep 13, 2010

  3. alpha6164

    alpha6164 alpha6164

    25
    0
    Feb 16, 2009
    Jacksonville, FL


    Sorry i forgot to mention that it already has a 22lb spring installed. I was probably about 5 yards away from the chrono which is about 15ft.
     
  4. AZBru88

    AZBru88

    1,328
    0
    May 21, 2010
    Arizona
    Alpha you've run me out of idea's. Sorry...Bru
    Hopefully someone that uses AA#7 will come along. I use mostly Blue Dot and Unique. Some AA#5 in 9mm. Best of luck...Bru
     
  5. OhioGlockMan

    OhioGlockMan

    226
    0
    Mar 1, 2010
    Akron, Ohio
    Try a very heavy crimp it gives better ignition and more complete combustion of the power. I do one full turn on the Lee Factory Crimp die