Privacy guaranteed - Your email is not shared with anyone.

Welcome to Glock Forum at

Why should YOU join our forums?

  • Reason #1
  • Reason #2
  • Reason #3

Site Description

What weight for .357 dia for .38 AND .357 mag?

Discussion in 'Reloading' started by Glock21sf-miami, May 3, 2010.

  1. Glock21sf-miami


    Jul 25, 2008
    Fellow shooters,

    I am about to buy a case of .357 dia jacketed bullets to load both .38 special and .357 magnum. I have had a great experience with Montana Gold and would like to order a case of .357 dia at the same time I order another case of 200 gr. .451 dia JFPs...

    They have 125 gr and 158 gr bullets, which weight do you guys favor for loading both .38 and .357?

    Thanks in advance for your input!

    Ah, and before you ask.... I do not want to get lead bullets nor I am interested in casting at this time. Due to my particular situation at home, I have to avoid having exposed lead around.
  2. marchboom


    Aug 18, 2006
    If it's just for target shooting, no need to punish the gun and your hand. I would shoot the lighter bullet. Less recoil, less powder, etc.

    There is no reason to shoot a heavier bullet.

  3. Patrick Graham

    Patrick Graham Footlong Jr.

    Sep 7, 2001
    Kokomo Indiana
    I'm a 158 grain fan for both 38 and 357.
  4. 158 grain. Max loads of 125s can cause erosion in J frames and K frames.
  5. fredj338


    Dec 22, 2004
    That actually casue erosion on the N frames as well. If you don;t run them at max pressure, they will be fine.:dunno:
  6. Not as severe, not as significant, and not as fast when compared to a J or K frame. Technically they'll erode all revolvers, it's just on a J or K frame it's a rather rapid process.
  7. ssgrock3


    Aug 10, 2003
    Yukon, Oklahoma
    This is kind of odd per this thread, but I have found that my 158's have less recoil. I like 158's in a .38 and 125's in a .357. But load 158's in both for target shooting.
  8. Zombie Steve

    Zombie Steve Decap Pin Killa

    May 31, 2007
    Old Colorado City
    I like the 158's myself. In .38 special, the 125 just doesn't seem like it would penetrate well. Maybe unfounded, but I'm all about feelings today. :whistling:

    Loading the 125's hot in .357 mag doesn't necessarily recoil as much, but the concussion / flash / blast is something else.
  9. wavetrain75

    wavetrain75 Useless Member

    Jan 31, 2008
    Yup, 158 works well in both.

    If you're loading for a lever gun you'll like a jacketed flat point a lot more than a semi wad cutter, the SWC will shave a little off the edge when you jack it into the chamber and mess with your accuracy.
    Last edited: May 3, 2010
  10. mitchshrader

    mitchshrader Deceased

    Jun 14, 2005
    I only use 158 gr bullets just to keep it safe and simple. I keep meaning to work up a 180 grain bullet load but havn't.

    The 125's are what I don't want in any revolver I own, but jsp's in .357's make a ton of power in the carbine. That's the only place I use a 125 gr bullet, and it's a mastiff stopper, 1000 ft lbs + ME, and meant for point blank range and a massive energy dump.

    What might require that I dunno, but the 125 jsp @ 2000+ fps does it.
  11. fredj338


    Dec 22, 2004
    Well sure, there is a lot more metal around the bbl & the top straps are a bit heavier. Still, keep them off the top end & I doubt you see much diff in wear.
  12. Glock21sf-miami


    Jul 25, 2008

    I understand a lighter bullet will require MORE powder than a heavier one...

    I tend to favor the heavier bullet but I wanted to know what some of you think before buying 1K bullets for these calibers.

    I am loading for a 2.25" .357 Ruger SP101 and a 1.78" .38 special S&W 642. I am planning on loading mild loads for the .38 and medium to hot ones for the .357....

    My practicing is mainly geared towards SD but I do like shooting these two revolvers over longer-than-sd distances. It is really impressive how accurate they can be when you learn about trigger management and proper sighting.
    Last edited: May 3, 2010
  13. coachg


    Dec 7, 2007
    I've gotten some nice 125 gr bullets from Roze Distribution. The price is great and the quality seems good as well.

    I've been shooting them at the high end out of my GP100. Any concerns about wear with that pistol?
  14. tjpet


    May 14, 2001
    Utah-Idaho border
    I've always liked 158s for both calibers.

    As to gas cutting of the top strap with lighter weight bullets run hot. You will get some but it only runs so deep then stops. Except for some slight visual marring it poses no real threat that will lead to serious damage.
    Last edited: May 4, 2010
  15. gjk5

    gjk5 Pinche Gringo

    I agree on the SWC but LTCFP work great in my '94.
  16. DWARREN123

    DWARREN123 Grumpy Old Guy

    Jan 25, 2008
    Clarksville, Tn.
    158gr for both. It is basically what they were designed for and you can load them to any level.
    For scoring on a target either wad cutters or semi-wad cutters, they make nice big scoring holes with smooth edges.
  17. JimmyN


    Sep 29, 2006
    The SP101 will tend to shoot several inches lower with 125gr than it will with 158gr at the typical 21' distance.

    Shooting 125gr I have to completely cover the 10 ring with the front sight, with 147gr the top of the front sight post will be the POI, with 158gr a 6'oclock sight picture with the bullseye on top of the sight post puts it in the 10 ring.

    The hotter the load on the 125 the lower it tends to shoot since it exits the barrel faster, just as the lighter the load with 158 the higher it will shoot since the muzzle has risen even more by the time the bullet clears the crown. 147gr always tend to be 'about right'.

    Since shooting 125gr requires me to cover the target with the front sight, and I can't actually see the bullseye, I prefer the 158gr for the better sight picture.