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WTB - 357Amp Case forming dies
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avion View Drop Down
180 Auto Mag
180 Auto Mag


Joined: 06 May 2015
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    Posted: 06 May 2015 at 7:15am
WTB: 357Amp case forming dies - RCBS part number 40040.
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jw4570 View Drop Down
Callahan's Auto Mag
Callahan's Auto Mag


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Points: 1334 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jw4570 Quote  Post ReplyReply Direct Link To This Post Posted: 14 May 2015 at 1:19am
Avion,
 
I don't think I have a spare set of forming dies, but you can order case forming dies form CH4D.  It will be custom and take weeks or a couple months, but you will get them. 
 
Also, do you need them or just want them for your collection?  They are not needed to load 357 AMP ammo.  You just need a set of 357 AMP loading dies.  You can fabricate 357 AMP cases by lubing (I like Imperial Sizing wax for fabricating operations) 44 AMP starline cases and running them into the 357 AMP sizing die (set for fully sizing, camming over slightly on the shellholder) in a proper hefty press such as an RCBS Rockchucker.  I've formed 1000's this way.  You might screw up a few, but once you get the hang of it, it should go well.  Don't use too little or too much lube.  Too much lube will dent the shoulders.   Of course, use info at your own risk. 
 
Jason
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avion View Drop Down
180 Auto Mag
180 Auto Mag


Joined: 06 May 2015
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Points: 20 		Post Options Post Options   Thanks (0) Thanks(0)   Quote avion Quote  Post ReplyReply Direct Link To This Post Posted: 14 May 2015 at 2:43am
Hi Jason, thanks for your reply and advice. I have purchased Automag 160 model in 357AMP and I was lucky to find set of dies. Since I am based in Australia getting components is a bit harder. Hence my desire to use 308 brass. After reading about the procedure and forming some cases I understand the need to ream the necks. I have managed to make some by simply running a 9mm drill bit and using that as a reamer but I have ordered a proper 9mm reamer for a few dollars of ebay. I hope that will allow for more uniform results. I still desire a proper set on the end of the day but it seems I will be able to make cases anyway. I am yet to collect the pistol in a few days and hopefully shoot it soon afterwards. I will let you know the results.
 
Again, thanks for your insight.
 
Regards,
Tom
 
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Dances with AutoMags View Drop Down
Callahan's Auto Mag
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Points: 613 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dances with AutoMags Quote  Post ReplyReply Direct Link To This Post Posted: 14 May 2015 at 4:48pm
Quality Cartridge makes two calibers of Auto Mag brass head-stamped 357 AUTOMAG and 41 AUTOMAG.
I believe some competition shooting requires that the brass you use be properly head-stamped. 
It is not cheap and may not be in-stock, but there you go, another source for brass.
They are good people to deal with too.
Bruce
An armed society is a polite society.
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jw4570 View Drop Down
Callahan's Auto Mag
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Points: 1334 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jw4570 Quote  Post ReplyReply Direct Link To This Post Posted: 15 May 2015 at 11:05am
Tom,
 
If that's the case, I'd order a reamer die and reamer from CH4D who does do international shipping:
 
 
You can special order the RCBS from Midway too:
 
 
Just get the set that says forming set from 308.
 
I'm assuming you are cutting down the 308 brass to an appropriate length, then running it in the 357 AMP die, and then reaming it, and then final trimming it.  With a 357 form set, you cut the brass, put it the ream die which forms it, then ream it through.  You really need a reamer die as it will keep the brass concentric.
 
It would be best to have a "stop" collar on the reamer to prevent it from hitting the head of the case as it reamed through.  Probably not a big deal if you are powering the reamer with a hand tap.  My CH4D ream set did not have a collar, but I added one. 
 
The other option is to form 44 AMP brass and then form it to 357.  But that seems silly unless you already have a 44 AMP form set.  Why not just buy the 357?  And the 44 amp reaming leaves a ridge down in the form case (some of them at least). 
 
Jason
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avion View Drop Down
180 Auto Mag
180 Auto Mag


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Points: 20 		Post Options Post Options   Thanks (0) Thanks(0)   Quote avion Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2015 at 8:52am
Hi Jason,

I will look into CH4D. I know Midway does not do international orders.

I have tried cutting and the forming and forming and then cutting brass and it seems to work both ways equally well.

I have reamed it straight in the forming die from the original dies set. I am in a process of making a collar to protect the die. I have a lathe and mill so can do basic work like that.

I also had a few shots with it now and it seem to cycle fine. It is a pleasure to shoot. What a fun! Had no failures of any kind. I intend to take it to metallic silhouette comp in a week or so.

Regards,
Tom
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Points: 6 		Post Options Post Options   Thanks (0) Thanks(0)   Quote superdave714 Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 2015 at 7:06am
I am a new member and not very computer savy! I have a AMT 357 sig Backup and I need you alls help, I  am trying to find out where I can purchase a spare clip and have not had any luck in 2 months of trying. if someone could help an old man I would be very greatful. P.S. and if you do have an answer for me I hope I can figure out how to retrieve it! embarrassed in WEST VIRGINIA not dumb except this internet is a whole different story. Thanks for your patients. Sincerely: Dave L.
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Callahan's Auto Mag
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Points: 1334 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jw4570 Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 2015 at 12:47am
Avion,
 
If you want RCBS, then try Huntingtons:
 
 
They do export.  Not sure what the cost, but I think that price listed is only for components or ammo. 
 
Shoot them an email and see what they tell you. 
 
Your forming process seems good.  I would make a guide just like you said for your sizing die.  It would be nice if you could harden it.
 
Superdave-hopefully the answer on the forum took care of your questions.  Just so you know the 357 AMP is way different than the 357 SIG. 
 
Jason
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180 Auto Mag
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Points: 20 		Post Options Post Options   Thanks (0) Thanks(0)   Quote avion Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 2015 at 5:07am
Hi Jason, thanks for the info.
 
I have noticed every 3rd or 4th case is not concentric around the neck which is due to using ordinary drill bit to ream. Nothing to worry about since this small batch is only proof of concept and to work up a load. I can't wait to get my hands on the proper reamer to try.
 
Case forming die set is priced at Midway for $254. (Ouch). It is numbered #58271 (RCBS). How is this different to #40040 set? According to the title they both do the same job.
 
Tom
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Callahan's Auto Mag
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Points: 1334 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jw4570 Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2015 at 2:00am
Tom,
 
here's an article I wrote a while back:
 
 
The formatting is a little messed up, but you should be able to follow it. 
 
I don't know about the different numbers, but you can see sets I have shown different numbers over the years.  And yes, those die sets are spendy.  That's why I recommended CH4D.  You could also try ordering just the reamer die and reamer, but usually it's only a little more for the case form set which includes the trim die that you can use the hacksaw blade to cut off the case and file to trim to height of the die.  I suspect that's just the most current catalog number RCBS uses.
 
Note that on the loading dies, the older RCBS decapped in the expander stage, which doesn't work with modern progressives like a Dillon 550.  You can just use Dillon's powder funnel for 357 or 44 Mag, but you'll need to get a decap assembly out of another die set (maybe you have one to "borrow"), but it's not always easy as the threaded adapter of the right size  for the 44 isn't in many other dies sets.
 
Let us know what you decide.
 
Jason
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