reloading 38 spl cases to shoot in a 357 magnum

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reloading 38 spl cases to shoot in a 357 magnum

Post by rebs on Thu Aug 03, 2017 7:53 pm

When reload 38 spl 148 gr hbwc to shoot in a 357 gun, do you extend the OAL to reduce the bullet jump distance to the forcing cone ?

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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by troystaten on Thu Aug 03, 2017 8:07 pm

No, I have never done that.  Have never heard anybody doing it but you could always try.

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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by james r chapman on Thu Aug 03, 2017 8:08 pm

Absolutely NOT....

If you can't resist, seat the wadcutter flush in a .357 case. Probably have to use a half grain more powder.
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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by Hawkja on Thu Aug 03, 2017 10:31 pm

I have loaded and shot thousands of .38 special rounds using 148 gr cast bullets with an extended COL without any problems. I only shoot these rounds in my S&W 66 and 586 (.357's 4in barrels). From what I've seen it reduces leading in the cylinders. I am interested in learning why this shouldn't be done. I don't use these loads in my BE pistols, just concerned with the safety of it.

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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by james r chapman on Fri Aug 04, 2017 6:18 am

Bullet alignment. Excessive case capacity.

It won't hurt but serves no purpose.
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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by rebs on Fri Aug 04, 2017 8:04 am

Not loading in 357 cases, loading in 38 cases. The question is when loading in 38 cases to be fired in a 357 gun does it help any to extend the OAL so the bullet is the same distance from the forcing cone as loading in 357 cases

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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by LenV on Fri Aug 04, 2017 8:47 am

Rebs, It will not make it more accurate. If you think about it if it made it more accurate you would do it for the 38 special also. The bullet is almost 1/2" from the forcing cone in the 38. Other then that I shoot a 14-6 and a 27-3 with the same bullet I use in my model 52. I can not tell any difference in accuracy. The revolvers will both shoot sub 10 ring groups from a rest at 50 yds. Good enough for me.

Len
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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by rebs on Fri Aug 04, 2017 8:50 am

Thank you for the replies I guess maybe I have too much time on my hands.

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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by james r chapman on Fri Aug 04, 2017 9:46 am

Spend it dry firing..lol

No bad questions, Elmer Keith wouldn't come up with magnums without trying stuff.
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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by rebs on Fri Aug 04, 2017 12:25 pm

Thank you Jim

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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by noylj on Fri Aug 04, 2017 7:32 pm

First, you have to find out what works in your gun.
How do factory .38 special wadcutter loads work? Any reload you make will be lucky to be as accurate.
We can tell you that we don't do that, but that doesn't mean you might not find it better.
The thing is, the reason, if valid, would necessitate the use of .357 mag cases any way, so get the "right" cases.
HBWCs: seat just below flush with case mouth
DEWCs: you can seat them out to first crimp groove, if testing shows that is more accurate.

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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by rebs on Thu Dec 28, 2017 3:41 pm

If you load just below flush with the case mouth is there any chance of bullet set back when you shoot them ?

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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by STEVE SAMELAK on Thu Dec 28, 2017 4:05 pm

Due to the rules described by some Newton guy (I think), when the gun goes back in recoil the bullets in the other chambers want to sit still.  That would make them move out of the case until they meet the crimp.  Besides holding the bullet in place until you get good combustion, I give a healthy crimp to keep the cylinder from getting locked up by bullet pull out.

Or maybe I'm wrong...again
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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by rreid on Thu Dec 28, 2017 4:53 pm

rebs wrote:If you load just below flush with the case mouth is there any chance of bullet set back when you shoot them ?
If you have adequate case neck tension, that shouldn't be a problem. You could test this if you're concerned, by making a dummy round and attempting to push the bullet in further with a small dowel or a punch.
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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by USSR on Thu Dec 28, 2017 5:52 pm

Like Steve said, recoil makes bullets want to come out of the case, not go in deeper.

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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by james r chapman on Thu Dec 28, 2017 7:07 pm


USSR wrote:Like Steve said, recoil makes bullets want to come out of the case, not go in deeper.

Don
Ive noticed when not resizing and just crimping recoil will not force the bullet out but the bullet will move back in the case against the powder charge.

Usin ..357 cases you might resize, flare and seat the bullet to a depth =to a .38 sp.. then roll crimp to case size.
This is what the old .38-44 S&W target gun used.
Use at own risk I haven't tried it...
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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by USSR on Fri Dec 29, 2017 7:58 am


USSR wrote:Like Steve said, recoil makes bullets want to come out of the case, not go in deeper.

Don
james r chapman

Ive noticed when not resizing and just crimping recoil will not force the bullet out but the bullet will move back in the case against the powder charge.
Jim,

I am assuming you are using a roll crimp then.   Try a taper crimp.

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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by james r chapman on Fri Dec 29, 2017 8:44 am

I might try that. Would a 9mm taper crimp die work? I wonder. Or a .380. or ...
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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by USSR on Fri Dec 29, 2017 8:58 am

A 9mm taper crimp die should work.   I've got the 4 die Lyman .38/.357 set which includes a taper crimp die.

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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by Wobbley on Fri Dec 29, 2017 9:31 am

I’ve loaded HBWC in 357 cases. I seated them to flush just like in 38 Special. I used data from here as a guide. http://www.castpics.net/LoadData/Freebies/RM/Alliant/Hercules_1987.pdf

I seem to remember using 4.5 of Unique but I may have used Bullseye, I can’t remember. It wasn’t as accurate as regular 38 Special wadcutters in the same gun(Python) but it was still well inside the 10 ring. YMMV

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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by BE Mike on Fri Dec 29, 2017 9:43 am

I'll just say this. When revolvers ruled in PPC matches, there were many matches won by officers shooting factory .38 SPL HBWC cartridges in .357 magnum cylinders. At one time, some pistolsmith actually made a short .38 SPL length cylinder with a barrel set back to meet it for shooting .38 SPL wadcutters only. It was reasoned that this would give better accuracy.  It turned out that it had the same accuracy as regular revolvers with factory cylinders. Now that revolvers aren't very popular, a lot of this information has been overlooked, except by old f@rts like me. My thoughts are that you are creating a solution for a problem that doesn't exist.
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Re: reloading 38 spl cases to shoot in a 357 magnum

Post by james r chapman on Fri Dec 29, 2017 10:04 am

Yep, my 6" model 66 has shot 2" groups off sandbags at 50 yds.
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