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Please recommend a powder for 200gr XTP...

Discussion in '10mm Reloading Forum' started by alank2, Sep 18, 2012.

  1. alank2

    alank2

    957
    14
    May 24, 2004
    Hi,

    I've been running 1.250" oal with 9.6gr of AA#7, CCI 300 LP.

    Glock barrel: Avg 1044, sd 11, es 42, temp 85 F, n=10, G20

    Storm Lake barrel (factory length): Avg 1108, sd 14, es 43, temp 70 F, n=10, G20 SL

    I see some primer flattening - nothing severe, and more on some rounds than others so I am looking for another powder to try that will meter well and produce the same velocity and lower pressure - any ideas on what I should try?

    Thanks,

    Alan
     

  2. Taterhead

    Taterhead Counting Beans

    3,595
    107
    Dec 13, 2008
    Boise, Idaho
    Accurate no. 9.

    I have tried Blue Dot, 800-X, and Longshot as well. I can't get to the same velocities of A9 without significantly loading past book loads with the other powders. I like A7 too, but not for pushing maxes.

    Working up toward the Hornday max, I get to 1200 fps with a 200 gr XTP just below the book max. This is in my G20 with stock barrel. That load is higher than the Accurate max, but less than the Hornday max. Both loads are published for the XTP specifically. A9 meters as well as A7, and is much more suitable for the 200 gr bullets.

    Of course, I hand weigh all charges that approach max - even A9.
     
  3. alank2

    alank2

    957
    14
    May 24, 2004
    Hi Taterhead,

    Is the AA#9 a compressed load?

    Thanks,

    Alan
     
  4. nickE10mm

    nickE10mm F.S.F.O.S.

    4,130
    67
    Apr 13, 2004
    Wichita, KS
    Longshot is my personal fav and you will easily hit 1050-1100 with a book charge, but I've not yet messed with AA9. AA7 is another favorite of mine but, as has been said before, its not ideal for 200gr bullets. If it were, I'd probably use it more than BD... Also, 800x is GREAT for velocity but won't safely meter....
     
  5. alank2

    alank2

    957
    14
    May 24, 2004
    Hi,

    One of the 35 rounds I shot the other day (200gr xtp, 1.250" oal with 9.6gr of AA#7, CCI 300 LP) was odd - the outside of the case was much more sooty than the others. I noticed it after firing it and 3 hours of corncob didn't polish the black off of it while the other cases came out gleamy bright. The primer doesn't look any flatter on it than the others... Any ideas?

    Is AA#9 just as fine as AA#7?

    Thanks,

    Alan
     
  6. nickE10mm

    nickE10mm F.S.F.O.S.

    4,130
    67
    Apr 13, 2004
    Wichita, KS
    USUALLY, the soot means that you have too low of a charge ... and the seal isn't strong enough and gas and soot comes back and gets on the case. I have a lot of that with lower charged Longshot loads. I don't have a manual in front of me so I don't know if your AA7 charges are hot-book or medium-book so I can't tell you for sure that's what's happening. I personally think that AA7 and AA9 flatten primers more than other powders because they are such small, fine, sand-like particles that get down in the primer pocket and flatten them. Try using case expansion instead of primer flattening to guesstimate pressure next round. Just an idea.

    AA7 is faster than AA9 and, while its a GREAT powder, I think AA9 is better for the heavier bullets as its slower.
     
  7. alank2

    alank2

    957
    14
    May 24, 2004
    Hi,

    I'm between trying long shot and AA#9. I keep reading about how LS meters poorly - how poorly are we talking about in a Dillon measure? +/- 0.1 ? +/- 0.2 ? Does it meter worse than blue dot?

    Thanks,

    Alan
     
    Last edited: Sep 19, 2012
  8. nickE10mm

    nickE10mm F.S.F.O.S.

    4,130
    67
    Apr 13, 2004
    Wichita, KS
    No powder will ever meter like Accurate 7 & 9 but Longshot meters great! Even better than BD
     
  9. alank2

    alank2

    957
    14
    May 24, 2004
    Hi,

    Is there official 200gr XTP data for long shot? I didn't see it on their website...

    edit - nevermind I found it!

    Thanks,

    Alan
     
    Last edited: Sep 19, 2012
  10. ctious

    ctious

    554
    1
    Dec 12, 2011
  11. alank2

    alank2

    957
    14
    May 24, 2004
    Hi,

    I picked up some Longshot tonight - got Bass Pro to match a local store. They wanted $29.99 for it, but I got it for $19.99...

    Anyone have a softer shooting XTP 200gr load to recommend? oal?

    Thanks,

    Alan
     
  12. nickE10mm

    nickE10mm F.S.F.O.S.

    4,130
    67
    Apr 13, 2004
    Wichita, KS
    Bps' rate on LS is ridiculous but they do that here too. Graf's sells it for 22$ all day long.

    Good choice in powder though. You will like it.

    7.3gr under a 200gr XTP's Hornady 8th's max and its very conservative. You wil be fine there.
     
  13. Taterhead

    Taterhead Counting Beans

    3,595
    107
    Dec 13, 2008
    Boise, Idaho
    Nope.
     
  14. Taterhead

    Taterhead Counting Beans

    3,595
    107
    Dec 13, 2008
    Boise, Idaho
    Nick pretty well covered this. You are not getting a good bore seal. The case acts like a gasget. The pressure of the load might not be enough to get a good seal. I also agree with the primer flattening hypothesis. I have observed this with most every load with A7 & A9. I have started messing with A5 a bit for plinkers, but I have not paid attention to see if it does the same. It is the same powder shape as its slower-burning siblings.

    A9 & A7 look identical. That is if you buy the powders made in the same location. A few years ago, A7 & A9 were made in Belgium. They look just like each other. They are both now made in the USA (gotta like production on-shoring!). Both look different than the Belgian-made stuff, but otherwise look the same as each other.

    In other words, A9 meters as superbly as does A7.
     
  15. alank2

    alank2

    957
    14
    May 24, 2004
    Hi,

    Thanks guys. I loaded up 10 test rounds last night; I thought LS metered great. I ended up loading:

    Winchester 10mm Brass (1F), Hornady XTP 200gr (.400), Hodgdon Longshot 7.5gr, CCI Large Pistol (#300), 1.250 oal

    My SL barrel seems to like the crimp in the 0.4205 or smaller. At 0.421 or larger, the round doesn't drop in freely and fall out freely.

    Thanks,

    Alan
     
  16. OhioGlockMan

    OhioGlockMan

    226
    0
    Mar 1, 2010
    Akron, Ohio
    My experience has shown me that blue dot is the best powder for the 200 weight range. Your going to want to be in the 9-9.5 ish charge weight range to get to 1200 FPS
     
  17. alank2

    alank2

    957
    14
    May 24, 2004
    Hi,

    Wow the longshot rounds shot great! I'll post up the chrono info later on tonight. I shot them next to my AA#7 load (9.6gr) and the longshot load felt much better. The AA#7 feels too fast.

    Thanks,

    Alan
     
  18. Cwlongshot

    Cwlongshot

    451
    4
    May 31, 2011
    Connecticut
    I am also working up a loading with Longshot and a 200XTP. I loaded to 9g with zero pressure signs...

    6"KKM barrel and a G20...

    CW
     
  19. alank2

    alank2

    957
    14
    May 24, 2004
    Hi CW,

    What oal are you loading to?

    My chrono results:

    Winchester 10mm Brass (1F), Hornady XTP 200gr (.400), Hodgdon Longshot 7.5gr, CCI Large Pistol (#300), 1.250 oal

    Avg 1060, sd 13, es 39, temp 85 F, n=10 G20 with SL barrel

    Thanks,

    Alan