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200XTP and AA#7

Discussion in '10mm Reloading Forum' started by eman308, Oct 7, 2010.

  1. eman308


    Aug 8, 2010
    Well, my Starline brass came today.:cool: Went to Gander and they only had AA#7. So, for those who know, I was thinkn bout staring at 10gr and go'n up by .2 till I got 1200FPS. What OAL should I start with? 1.25? This will be out of a G20, CCI300 primers, stainless guiderod, 22lb spring and a LWD 5" barrel.Whats the thought on #7 for 200grs? Pros and cons of #7? What say Ye?
  2. I suggest you to read first this thread:
    10mm Reloading Forum > Accurate Arms Data

    and probably you will get a lot of information to start loading with AA #7 which is one of the most recommended gunpowders for 10mm. With AA #7 you can even try with CCI 350 magnum primers, but start 10% lower with magnum primers than with regular. And carefully observe brass and primers for any overpressure signs at every shot.

    If you have never loaded 10mm before, you MUST read also this thread:
    10mm Reloading Forum > All Forum Users Must Read This

    Enjoy your 10mm and stay safe! :cool:
    Last edited: Oct 7, 2010

  3. _The_Shadow

    _The_Shadow Ret. Fireman

    Jul 23, 2007
    Southeast, LoUiSiAna
    eman308, The AA#7 is a good powder is a little fast for the heavier bullets. Here is some data for Accurate Arms as you can see 1200fps is a little out of reach velocity wise. No. 9 will get you closer.

    That being said the upper loading of AA#7 is not athe rocket you are looking for but that pressure will go up quickly above the recommended max shown. Good luck!

    HDY 200 XTP 1.250"
    No.2 5.7 916
    No.2 6.3 1041 36,700 psi

    No.5 7.0 938
    No.5 7.8 1066 35,100 psi

    No.7 8.8 960
    No.7 9.8 1091 36,500 psi

    No.9 11.3 1030
    No.9 12.5 1170 37,000 psi

  4. eman308


    Aug 8, 2010
    Thanks Shadow, thats what I was lookn for.
    Eman out.
  5. gator378

    gator378 Gator378

    Jan 22, 2001
    St. Peters, Mo, USA
    If you want 1200 fps I would go AA #9. That is the only 10mm powder I have used for the past 10 years. I buy it in the 8 lb container.

    AA #9 and a six inch barrel will get you 1200 fps plus without excesive pressure. One of these days a long slide will show up at my house.
  6. Kegs

    Kegs Ol 8 fingers ;)

    Oct 26, 2009
    Cold side of conus
    800x.= THE powder for these bullets. :thumbsup: