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.357 Mag w/ 125gr JHP / 10.0gr HS-6 = 1212 ft/sec?

Discussion in 'Handloading and Reloading' started by keltec, Sep 5, 2009.

  1. keltec

    keltec Member

    Hi there!

    This is my 1st post, and I'm, looking for some feedback on my current (.357 mag) hand load, as I am a bit disapointed with my FPS result.

    125gr Winchester JHP
    10.0gr HS-6
    CCI 550 sp-mag primers
    Federal and RP brass

    I had a chance to use a chronograph and shot 11 rounds through it, I tossed out my highest and lowest FPS result, and used the remaining 9 shots to get an average of 1212 FPS. This came out of a Taurus 608 (.357 mag) with a 6.5" barrel.

    My questions are:

    1. Does this seam a bit slow to you?
    2. What FPS results are you getting with HS-6 shooting a 125gr bullet?

    I was expecting to get close to 1500 FPS, as my 1998 Hodgon Basic Reloading Manual shows 10.0gr of HS-6 @ 1542 FPS with 34,800 CUP out of a 7" barrel.

    Any thoughts or advice is welcomed. Thanks......
  2. Walkalong

    Walkalong Moderator

    I haven't shot HS-6 in .357, but 9.1 Grs of N340 gives me around 1350 FPS with a 125 Gr JHP from a 6" barrel, so I would think 10 Grs of HS-6 would be close or even beat that.
  3. rcmodel

    rcmodel Member in memoriam

    I think Hodgdon got a little overly optimistic with that load data results.

    Hornady #4 shows a 125 XTP, HS-6 starting load of 10.5 grains giving in the 1,450 FPS range.
    A MAX load of 11.6 is 1,600.

    That out of an 8 3/8" S&W Model 27!

  4. Galil5.56

    Galil5.56 Well-Known Member

    Last edited: Sep 5, 2009
  5. tasco 74

    tasco 74 Well-Known Member

    1212 is a good fps speed for a .357 magnum handgun..... you must remember the fastest isn't always the most accurate..... i'd like to see the target groups from what you have there ........

    LIFE IS SHORT.....
  6. RidgwayCO

    RidgwayCO Well-Known Member

    How far was the chronograph from the end of the barrel? If you're too close (less than 10 feet), then muzzle blast can mess up the readings. Just a possibility.
  7. keltec

    keltec Member


    At (15'-18') I can put them all in the 4" target. My 608 holds 8 rounds, so it fills it up good. Thats freehand, and good enough for me. I know some guys will say they can shoot 1-2" groups, but I'm happy with what I can do. I just walk up and bang, bang, bang, until empty........ never timed it, but my guess is about 7-8 secs. I figure, if needed, that would do the trick while I'm at home.
  8. keltec

    keltec Member


    Chrono was about 8' from gun. My buddy just got it, and was shooting his .308 handloads, @ 10', he said you need to be closer, so I went 8', however he forgot the directions at home, so he was not sure of what distance I should be with a handgun.

    His .308's (150gr were going about 2700 FPS) and I had some H-110 loads worked up from 10 years ago, not sure of what I had in them, might have been around 19.0gr, but they did 1513 avg FPS out of my gun.
  9. Steve C

    Steve C Well-Known Member

    Just for comparison, the Speer #13 manual lists 10.0 grs of HS-6 using a CCI magnum primer producing 1,009 fps from a 6" S&W model 19 and a max load of 11.3grs at 1,124gr.

    Hodgdon uses a 10" test barrel to determine theri velocities so with the loss from the cylinder/barrel gap in a revolver along with the shorter barrel you actually did pretty good.

    I haven't used HS-6 with 125gr bullets in the .357 mag but have with 110gr bullets. In loads I've chrono with 10,6gr of HS-6 behind an IMI 110gr bullet my velocities where 1,341 fps from a 6" Colt Trooper and 1,212 fps from a 3.5" S&W M27.
  10. Walkalong

    Walkalong Moderator

    I just looked in the Speer #13 and for 125 Gr jacketed bullets with HS-6 it gives a start load of 10.0 Grs for 1009 FPS & a max load of 11.3 for 1124 FPS. That was from a 6" Model 19.

    Well d***, I should have read Steve C's post first. Never mind. :eek:
  11. zxcvbob

    zxcvbob Well-Known Member

    10.0 is kind of a light charge with 125 grain bullets (you are using .357 brass and not .38 Special, right?). You should be getting more than 1200 fps, but maybe the powder is not burning completely; try it again at 10.5 and see if it cleans up for you. Max load is 11.something.

    I tend to load everything towards the upper end, and I choose the powder (fast, slow, in-between) that will get me the velocity i want.
  12. jfh

    jfh Well-Known Member

    Your numbers are OK, I think--

    Among other "Rules of thumb" I got from the Ramshot ballistician:

    1. 20% lower with a vented (revolver) barrel, as opposed to the pressure barrel values.

    2. 5% lower for shorter barrel length, per inch. That's a ballpark. With HS-6, I doubt that I would chop it 20% for the drop from 10" to (nominally) 6"

    So, my assessment is that you did just fine--i.e., Steve C's comments apply.

    Jim H.
  13. keltec

    keltec Member


    Are you saying that with a (ported / vented) barrel you loose about 20% FPS vs non-ported barrels?

    I never even thought about that. My 608 is ported, from the Factory.
  14. jfh

    jfh Well-Known Member

    No--I'm using the jargon he used to describe the difference between a pressure barrel and a revolver--i.e., a barrel which is not continuous with the cylinder.

    If you google in this forum or in the revolver or semiauto forums, for ported barrels, you'll find at least a couple of threads with discussions about the velocity loss on ported barrels (revolver and semiauto).

    added on edit: Somebody recently bought the latest j-frame with the 2.25" ported barrel, and IIRC was able to compare it against a j-frame with the 1.875" barrel. Sorry, I don't have a link to it--but the velocity drop was less than we expected--I think something like 50-70 fps.

    Jim H.
    Last edited: Sep 6, 2009
  15. keltec

    keltec Member

    Steve C, Walkalong,

    What year is that Speer #13 manual?
    It seams every manual is a bit different, Speer #13, Hornady #4, or Hodgon's ect.... the results are a bit differnet.

    Based on Speer #13 data that you both posted, my 1212 FPS results were good vs their 1009 FPS result. That makes me feel a bit better.

    I do realize I can go a bit higher than 10.0grs and most likely will.

    Whats does Speer # 13 say about H-110, did they shoot it also from the same 6" S/W #19? Thanks for your help........ I got 1513 FPS out of my gun, H-110.
  16. keltec

    keltec Member


    Yep, .357 mag Federal & RP brass.

    Started with 10.0gr back in 1996, shot it, liked it, did the job. I did not shoot at all from 2002 till this summer (abt 7 years) got the bug again, shot like 100+ rounds, loaded some more, then my buddy got a Chronograph, and thats brings me to today, and this thread. Thanks.
  17. tasco 74

    tasco 74 Well-Known Member

    sounds plenty accurate for that gun offhand.......... i've never loaded any of that gr weight bullet but i do load hard cast 150 gr. swcs with 6.2 grs. of bullseye and get the same size group as you're talkin from my s&w model 27 6"........... they chrony at 1230-1235 fps consistantly........ i really need to get to the range to shoot some this summer before it's over:(...............

    LIFE IS SHORT.....
  18. ArchAngelCD

    ArchAngelCD Well-Known Member

    Welcome to the forum neighbor...

    Like the others have already said, Hodgdon and most other sources are always very optimistic when quoting velocity numbers. I doubt you will ever reach the velocity they quote when you fire the rounds.

    HS-6 is a medium burn rate powder and you will never achieve the highest velocities in a .357 Magnum with it. It's a very good powder that I use a lot but not if you are looking for top end numbers. Slower burning powders like H110/W296, 2400, AA#9, Lil'Gun, 4227 and a few others will be needed for the highest velocities. IMO 1200+ fps from a 125gr bullet using HS-6 is doing good with that powder. I have no doubt using the Max charge of W296/H110 recommended on the Hodgdon Load Data site you will get that 1,500 fps and more you are looking for with a 125gr bullet. Why you will need all that velocity is a wonder to me but it's your right to chase it. Good luck getting the numbers up but don't be disappointed in the velocity you achieved with HS-6 because IMO you did well.
  19. Steve C

    Steve C Well-Known Member

    Speer #13 copyright 1998, mine was 5th printing 2003. Speer published their latest #14 in 2007 but I don't see any reason to get the new one yet.
  20. jfh

    jfh Well-Known Member

    Steve C: aw, g'wn--get the Speer 14.

    Although I will admit that the reason I bought it was for the "replica reload" short barrel work I did--not so much for general reference.

    Speer's original PDFs for their GDSB bullet recipes are greatly expanded in the 14.

    Jim H.

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