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Winchester AutoComp

Discussion in 'Reloading' started by robin303, Dec 31, 2009.

  1. robin303

    robin303 Helicopter Nut

    Sep 27, 2009
    Austin, TX
    Has anybody used this before. It’s supposed to be good stuff and fairly new out on the market. What it boils down to I bought a lb and there is no data for 9mm 115, 124 and 147 gr FMJ.
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    I went here but it does not really help.
    Is there any other place that you guys know where I can check.
  2. bigtinva

    bigtinva Megalomaniac

    Sep 28, 2002
    Northern Virginia
    Last edited: Dec 31, 2009

  3. MoNsTeR


    Aug 24, 2003
    Lakewood, CO
    Might want to give that site another try, the below is copy/pasted from there:

    Bullet Weight (Gr.) Manufacturer Powder Bullet Diam. C.O.L. Grs. Vel. (ft/s) Pressure Grs. Vel. (ft/s) Pressure

    115 GR. SPR GDHP Winchester AutoComp .355" 1.125" 5.1 1078 28,200 PSI 5.6 1161 32,500 PSI

    125 GR. SIE FMJ Winchester AutoComp .355" 1.090" 4.7 1055 28,900 PSI 5.2 1120 33,300 PSI

    147 GR. HDY XTP Winchester AutoComp .355" 1.100" 3.6 827 27,900 PSI 4.0 916 32,800 PSI
  4. robin303

    robin303 Helicopter Nut

    Sep 27, 2009
    Austin, TX
    Thanks for the info but I have the Berry's 115 FMJ and not hollow point and reloading for the 1st time I catch a big scary.
  5. Colorado4Wheel


    Nov 2, 2006
    Start with 5.1 grs, 1.130 OAL, 115gr FMJ bullet. Work it up from there.
  6. shotgunred

    shotgunred local trouble maker

    Mar 1, 2008
    Washington (the state)
    Autocomp is made for compensated guns. take it back and get any of these.

    power pistol
    win 231
  7. mteagle1


    Oct 17, 2008
    Great Falls, MT
    Powder is usually not returnable so you might as well use it with the 115gr data listed and Berry bullets are plated and not jacketed and most people use lead bullet listings.
  8. dudel


    Dec 10, 2008
    Texas Hill Country
    Not true. It works well in compensated guns (because of it's low flash characteristics); but it's not exclusively for compensated guns. Turns out it was the powder Winchester used in pistol rounds.

    I found the article in June 2009 of Handloader magazine (pg 26). They run loads for 32ACP, 45ACP, 38SPl, 357Mag, 41Mag, 44Spl, 44Mag and 45Colt. None of the guns had compensators.

    "Now Hodgdon has turned its attention to handguns and selecting from powders used in several Winchester pistol cartridges, chosen to expand the line once again. The powder is called AutoComp. It was designed principally for use in auto-loading pistols."

    "AutoComp's burning rate is in the range generally occupied by slow-burning shotshell powders, being a bit slower burning than Hodgdon's HS-6 and slightly faster than Alliant's BLue Dot. That said, the same range of burning rates frequently works well for metallic cartridges too, especially those of relatively small case capacity and moderate bullet weight. One of AutoComp's more significant characteristics is the very low level of muzzle flash, most important in low light, defensive situations, even of the training variety."

    "There are several other catridges with published AutoComp data I haven't tried yet, but the picture is pretty clear. There is a great deal of potential here in both pistol and revolver cartriges."
  9. BuffaloBo


    Jun 22, 2004

    All that info sounds encouraging. However, I'm at a point where trying out new powders, and going through more load development is becoming less and less appealing to me. I really do like the Winchester powder line, tho.:wavey:
  10. dudel


    Dec 10, 2008
    Texas Hill Country
    I hear you BB. Right now I'm happy with what I load. The M4 is new, so I do have to work up some loads for .223 (not as much fun as I remember it). Might not be a bad idea to get back in the practice of it though in case one's favorite powder is unavailable again. Might just be easier to stack your favorite powder(s) high and deep.

    My main purpose in covering AutoComp is/was to dispell the notion that it's only for compensated guns.
  11. dla


    Oct 19, 2002
    Hillsboro, Oregon
    Lack of load data support is probably the biggest problem with Autocomp. I've burned nearly a pound of it trying to find a sweet spot in 45acp. IMHO it sucks. If a person wants mouse-fart loads, use Clays, Titegroup, VV320, etc. If you want high-end loads use AA#5, PP, or maybe even RS Silhouette. AutoComp doesn't make sense for the 45acp unless it is the only thing you can find, (and that's how I ended up trying it).
  12. IndyGunFreak


    Jan 26, 2001
    Nevermind.. don't know how I missed it.. :)

    Last edited: Jan 16, 2010
  13. Uncle Dave

    Uncle Dave

    Jul 9, 2014
    I like AutoComp. I find it works well in both compensated and uncompensated 9mm, .38 Super and .38 Special. I especially like it because it throws very consistently (± .1 grains). But when using Hodgdon's online loading tables, as you approach .5 grains below listed maximum load, I get back-splatter out of .45 ACP, no matter which 1911 I use. I do not get this with any other of the listed calibers above. I can take 9mm, .38 Super and .38 Special all the way to maximum load levels and get no back-splatter of powder, jacketed, plated or JHP. One thing to remember if you're loading Berry's Plated is that you do NOT have to load according to un-plated levels as long as you do not exceed the normal 1250 fps Berry's advises for normal plating, or 1500 fps for thick plating. In my experience, I can load most any powder to jacketed limits using Berry's products and find no copper or lead fouling as long as I do not exceed recommended muzzle velocities. While there is still no fouling, .45 ACP is the only exception to this rule because I find the propellant back-splatter uncomfortable. So I simply use Blue Dot, #5 or Power Pistol for heavier .45 loads. As always, only you know the quality and condition of your firearm. Always work up your loads with your sidearm regardless of the tables. Start at the minimums.
  14. kaech


    Jan 26, 2012
    CG wisconsin
    I've been loading WAC for all my glock 9mm's. ..I love WAC loads perfect through my 650XL
  15. dla


    Oct 19, 2002
    Hillsboro, Oregon
    Normally we consider it better form to start a new thread instead of reviving a 4 year old one.
    Last edited: Jul 10, 2014
  16. IndyGunFreak


    Jan 26, 2001
    There does come a point where the search feature is a little annoying. A recent thread? I'd agree.. but if it's fairly recent, no need to start a new thread.
  17. sas-G19


    Apr 18, 2014
    KY, USA


    I am unfamiliar with this term "back-splatter" would you tell me exactly to what it is referring?


    Last edited: Jul 12, 2014