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40 cal powder for top end loads

Discussion in 'Reloading' started by breacher1, May 28, 2014.

  1. breacher1


    Apr 13, 2009
    I stumbled across a 250 ct box of 40 cal Nosler 150gr HP bullets the other day at the LGS and grabbed them on an impulse. I previously had great fun blowing up H2O filled milk jugs with 135gr Noslers and Longshot powder. My chrony showed quite a few breaking 1500 fps out of my G35 and that was at 8% below book max! amazing stuff.

    I don't have much Longshot left but I do have a pound each of IMR 800x, Power Pistol, and Ramshot Silhouette. (buying whatever I can find these days) The Power Pistol never broke 1400 fps with the 135 grainers when I compared it to the Longshot. No experience with Silhouette or 800x.

    The Silhouette is the closest to Longshot on most burn rate charts but I dunno if that equates to high velocity or not. Never heard rave reviews on that powder. I have read about people packing 800x into brass like they are packing black powder down a musket barrel. I'm hoping to get at least 1250 to 1300 fps out of the 150gr Noslers. Which powder would you bust open first for high velocity top end loads?
    Last edited: May 28, 2014
  2. 800x will get it done as will Longshot and Power Pistol. Top loads in each are very close. I do find 800x loads to be the most accurate by a small margin. 800x meters like crap but for max loads I always hand weigh each charge anyway.
    With a well supported chamber and enough recoil spring it easy to get well into 10mm ballistics. The 150 Nosler is a great bullet.

  3. WeeWilly


    Nov 12, 2011
    I agree.

    For what ever reason 800x seems easier on the cases than LS at similar velocities, but it meters so poorly (even when trickling) I really don't like it. Anytime I am trickling 4064 and get frustrated, I pull some 800x out and trickle a few charges, cheers me right up on the 4064.
    Last edited: May 29, 2014
  4. SJ 40

    SJ 40

    Jan 17, 2011
    The very reason I use Longshot,it meters like water. SJ 40
  5. breacher1


    Apr 13, 2009
    I really like LS but here in NM there is zero powder to be found. I'll have to bust open that bottle of cornflakes, I mean 800x, and see what I can do with it. But like I said above, nobody knows much about Ramshot Silhouette? It's not too far above LS on the burn rate charts.
  6. WeeWilly


    Nov 12, 2011
    I have not loaded it, but Ramshot has load data for Silhouette for 40S&W in the online data.
  7. pasky2112

    pasky2112 Senior Member

    Aug 2, 2012
    Brevard, FL
    Silhouette was one of the first powders I tried in .40 loads with 155/180g MG JHP. I worked up carefully to ~1000fps (180's) but moved on after trying PP and AA#5 which I now prefer in .40's using 155's. I revisited Silhouette since I had half my keg opened and on the shelf. After a couple more years experience, I discovered that RS pushed out the lighter 155/165gr in 10mm very nicely. I found those weights in my G20 had a nice accuracy sweet spot around 1400 fps hitting rams hard at ~80-100m. Shot clean, relatively. I had some 180's loaded to ~1150-1200 that began to show cases expanding to my envelope. But no need to push that powder harder. Others get my 180's to 1300fps safely and accurately. Power Pistol is one, 800x, LS and AA#9 give me great accurate loads at 1300 in my G20. Blue Dot is REALLY a grouper in a wide range of 10mm charges...but I always get 'flaked' no matter how I load it. PP seems to be the most diverse but AA#9 is rock solid for high vel heavies in 10's from brass to bang to's a pleasure.
    But my experience w/ silhouette has been great. You won't be sorry using it in .40 under those 150's at all... used safely.
    Enjoy! Safe loading and shooting!! 💵🔫😁
  8. SDGlock23

    SDGlock23 Glockoholic

    Longshot is probably your best bet when sticking to book listed loads, too bad you're running low. Power Pistol can do better, but you have to go a little over book to get it to wake up sometimes, pretty much the same with 800x, you might have to push a little past max to get to show its true colors. There's a thread over in the .40 S&W club called "favorite handloads", I've got some stuff in there.
  9. Taterhead

    Taterhead Counting Beans

    Dec 13, 2008
    Boise, Idaho
    Watch the Nosler 150s for sizing. I've had some undersized bullets that had some neck tension issues for certain cases (especially nickel cases).