Old February 22nd, 2021, 09:36 AM #91
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A load I always had good luck in 357 Mag is 3.3 gr Bullsye under 148 DEWC
gr and same charge under 158 grain SWC. Gave about 825 fps for the 148 grain...chrono’d at a PPC (Action Pistol) Match.m

As far as the lead ring and fouling at 38 Special depth in the 357 Magnum chamber..I keep a long slightly flared 357 case in the shooting bag. When the ring causes difficult chambering during a range visit, I just push the case through the chambers, cutting the lead and fouling out. Never failed to work. That said, I prefer using 357 cases in 357 revolvers, that being one of the reasons.
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Old February 22nd, 2021, 11:12 AM #92
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Commercial cast 158 SWC ( .358) with 3.2gr 231 , CCI std primer , with range brass gives sub 1.0 in @ 25yds in guns capable of that accuracy . I declared Victory at that point , and made that my accuracy test load .

That is 50fps slower than traditional 158 std vel factory loads . ( Chrono'ed from same gun vs Federal 158 LRN , back then that was a thing). If velocity matching is important to you , substitute 3.4gr of 231 , accuracy almost as good .


[ FWIW - Same bullets and cases , 4.5gr of Unique was mid to upper 800's , for my " full power , but not quite +P " load . This was as high as I cared to go with random Range Brass . For " more adventuresome " loads , I used once fired brass , that I personally once fired .]
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Old February 22nd, 2021, 11:46 AM #93
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How does my depth look if I use that on either 38spl or use same depth on 357?

I have some 148gr DEWC loaded that I have not tried with that pistol, its in a 38spl case and 3.5gr of W231

I'd REALLY like to get that 140SWC working cause that's a 6 bullet mold. Looking to see what I should change up to get say a 5 bullet group within 3" @ 25 yards from the rest.

Just looked at chrono data and the 140swc loads ranged from 880fps up to 990fps at the top
Again these are powder coated and I'm using hard lead (12-15bhn)
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Old February 22nd, 2021, 12:16 PM #94
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Should have mentioned , I never *measured * COL , simply crimped as appropriate in the crimp groove .

Since once upon a time I had access to quantities of .38spl range brass for free , and most of my .357 guns shot well enough with .38 case , .38 loads in .357 cases were never on my radar .
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Old February 22nd, 2021, 12:56 PM #95
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You should easily get 2 1/2” groups if you build the loads well and those bullets you cast are good quality.

The present loads you shot, are they all one charge weight or multiple weights? I ask be ause that is a big velocity spread.
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Old February 22nd, 2021, 02:30 PM #96
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Quote:
Originally Posted by Magnumite View Post
You should easily get 2 1/2” groups if you build the loads well and those bullets you cast are good quality.

The present loads you shot, are they all one charge weight or multiple weights? I ask be ause that is a big velocity spread.
that is across the range I tested.

3 shot groups.
For example, at 4.3gr bullseye, it was 995,991, 997

I'm not roll crimping by the way, Im using Lee FCD and crimping Just above the crimp groove.
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Old February 22nd, 2021, 06:22 PM #97
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Roll crimp will build initial pressure a little more before bullet movement. Probable itwill increase accuracy. Something to think about when you get to refining your loads.
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Old February 22nd, 2021, 07:10 PM #98
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So, going by a suggestion earlier in the thread, I looked at the cylinder throat of the 357 revolver I"m currently testing (S&W 686).
Turns out my 158gr Beveled SWC is actually sized to 357 and that pushes through with finger pressure along with a jacketed 128gr FP I have.
My DEWC and the 358 sized 140gr will NOT push though the cylinder throat.

I slugged the barrel but its hard to measure cause it has an odd # of grooves.

My though is to take the .357 158gr Lead SWC and build up some .357 cased loads with them across a broader spectrum of safe velocities and try that?
I'll be able to have the bullets start out making contact in the cylinder throats

How does that sound for a next step?
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Old February 22nd, 2021, 11:26 PM #99
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Quote:
Originally Posted by Melnic View Post
So, going by a suggestion earlier in the thread, I looked at the cylinder throat of the 357 revolver I"m currently testing (S&W 686).
Turns out my 158gr Beveled SWC is actually sized to 357 and that pushes through with finger pressure along with a jacketed 128gr FP I have.
My DEWC and the 358 sized 140gr will NOT push though the cylinder throat.

I slugged the barrel but its hard to measure cause it has an odd # of grooves.

My though is to take the .357 158gr Lead SWC and build up some .357 cased loads with them across a broader spectrum of safe velocities and try that?
I'll be able to have the bullets start out making contact in the cylinder throats

How does that sound for a next step?
When I owned .357 revolvers, I always loaded my .38's with only one caliber in the case. That put the bullet closer to the rifling. They were never as good as actual .357 brass loads but they worked. Loading .357 cases made a difference for me and it probably will for you.
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Old February 23rd, 2021, 12:43 AM #100
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^^^ That rings a bell for shooting the real heavy 180 grain bullets from 357 and 38 brass. Dejavu.
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