9mm/Sig 357 Reloading - SIG Talk
SIG Talk Gun Forum

9mm/Sig 357 Reloading

This is a discussion on 9mm/Sig 357 Reloading within the Ammo and Reloading forums, part of the Gun Forum category; I used to reload a lot but stopped for a while. Have re-set up my bench and plan to start over the holidays with my ...


Go Back   SIG Talk > Gun Forum > Ammo and Reloading


Ammo and Reloading Ammunition and Reloading Forum - For topics and discussions about ammunition and reloading your own ammo

Like Tree3Likes
Reply
 
LinkBack Thread Tools Display Modes
Old 12-17-2016, 05:10 AM   #1
Supporting Member
Supporting Member
 
RatBikeRod's Avatar
 
Join Date: Nov 2016
Location: The Great State of TEXAS
Posts: 892
9mm/Sig 357 Reloading

I used to reload a lot but stopped for a while. Have re-set up my bench and plan to start over the holidays with my two most shot rounds 9mm and Sig 357.

A few questions on this for those of you who reload these two.

Both are .355 rounds, but I have read that one should not use 9mm bullets for 357. I expect this is from the higher velocities 357 creates. I plan to use coated bullets which I hear perform fine in even higher velocity rifle rounds. Any thoughts here?

On the 357, crimp or no crip? Looks like the factory loaded rounds either have none or a very light crimp.

Anything special you guys do with the 357 resizing? I have reloaded 30/30 and other necked rounds, so I suspect this would be similar.

Anything else I need to know about loading these two rounds?

Thanks for any input.
RatBikeRod is online now  
Register

Welcome to the SIG Talk Forum dedicated to SIG Sauer Pistols and SIG Sauer Rifles.

We welcome everyone and the community is free to join so register today and become part of the SIG Talk Forum!

Old 12-17-2016, 05:22 AM   #2
Super Moderator
Supporting Member
 
Malicious Compliance's Avatar
 
Join Date: Jan 2013
Location: Location: Location:
Posts: 16,144
Montana Gold makes a great bullet for 357 SIG. Since stating to use this bullet, life has gotten easier. With a longer cylindrical body, a solid taper crimp is easy to achieve with the short case shoulder.
ni hao and AA3JW like this.
Malicious Compliance is offline  
Old 12-17-2016, 06:09 AM   #3
Senior Member
 
Flash LB's Avatar
 
Join Date: Apr 2015
Location: Gilbert Arizona
Posts: 6,865
I've got a friend who used to be a commercial bullet caster until he had some major health issues. He sold Hi Tek Coated bullets.

He told me he had personally driven some .22 Caliber ones over 2,000 fps in an AR he owns and had good accuracy with them, so I wouldn't worry about them at higher velocity.

I used his bullets almost exclusively until he quit casting and I now hoard them like gold.
Flash LB is offline  
 
Old 12-17-2016, 08:14 AM   #4
Senior Member
 
rlherrick57's Avatar
 
Join Date: Apr 2014
Location: Florida
Posts: 377
I am new to 357Sig also. As mentioned above by Major, the MG 125 grain has worked good for me. I am planning on looking at Precision Delta and RMR, both 124 JHP as I have heard they also are good 357Sig candidates. I have them on hand, just have not tried them yet so no feedback to provide.

EDIT: Also had issues with sizing/prep early on but settled on a simple solution. Clean, deprime, clean again, size with 40 carbide die, then the 357 sizing die. I strongly recommend a good case gauge. I was using the barrel only at first and finally realized that I didn't have my 357 die down enough so the shoulder didn't fit as good as it should. As Flash has said a 100 times...Set your dies up correctly.... Thats gospel.

Last edited by rlherrick57; 12-17-2016 at 08:17 AM.
rlherrick57 is online now  
Old 12-17-2016, 08:19 AM   #5
Super Moderator
Supporting Member
 
Malicious Compliance's Avatar
 
Join Date: Jan 2013
Location: Location: Location:
Posts: 16,144
Quote:
Originally Posted by rlherrick57 View Post
fI am planning on looking at Precision Delta and RMR, both 124 JHP as I have heard they also are good 357Sig candidates.
The Rocky Mountain Reloading bullets are very similar to the Montana Golds, should work well. I struggled with the Precision Deltas before finding Montana Golds.
Malicious Compliance is offline  
Old 12-17-2016, 10:39 AM   #6
Senior Member
 
loadedround's Avatar
 
Join Date: May 2014
Location: Valley Forge Pa
Posts: 615
FYI, the 357 Sig bullet is different than the 9mm bullet even though they're the same .355mm in diameter and the same weight. Basically the 357 Sig bullet is slightly longer so that it can be seated properly in the Sig neck. If you held a 9mm and a 357 sig bullet side by side you would see the obvious difference. I second Montana Gold bullets for the 357 Sig. I've been using them for the past 7 or 8 months and am quite fond of them.
loadedround is offline  
Old 12-17-2016, 12:14 PM   #7
Senior Member
 
Muddie's Avatar
 
Join Date: May 2014
Location: South Carolina
Posts: 216
I use the RMR's and they work well.
Muddie is offline  
Old 12-18-2016, 11:12 AM   #8
Supporting Member
Supporting Member
 
RatBikeRod's Avatar
 
Join Date: Nov 2016
Location: The Great State of TEXAS
Posts: 892
Ok, going to take you guys advice. Ordered up 1000 Sig 357 in 124 gr from Montana Gold, see how I like them. Not an overly bad price at $130. But I sure do like Missouri Bullet Company's $35 for 500 coated 9mm rounds.

I will probably try both to see how they function in the 357. If I could get away with using the same 124 that would be really nice.

However, I do see the bullet design difference between the two.
RatBikeRod is online now  
Old 12-18-2016, 09:03 PM   #9
Senior Member
 
disseminator's Avatar
 
Join Date: Mar 2015
Location: Minnesota
Posts: 475
FWIW I have shot hundreds of 124g Rainier Ballistics Plated Hollow Points in my P226 and M&P357 at about 1400 fps and they have been great. Accurate and no signs of tumbling or any other issues. They take a good crimp and I didn't experience any bullet setback at 1.14" OAL.

I like the Speer 125 TMJ the best though. They are a little more expensive, but were made just for 357 SIG and work perfectly and match up to the 125 Gold Dot.

I've heard the 125 Hornady HAP is a good bullet for 357 SIG but haven't tried them yet myself.

Finally I have loaded the 147g TMJ from Speer and the 147 Gold Dot to 1300 fps and they were good too. Speer lists both in their reloading manual for 357 SIG so they are good to go.
disseminator is offline  
Old 12-28-2016, 02:29 AM   #10
Supporting Member
Supporting Member
 
dwg13013's Avatar
 
Join Date: May 2012
Location: Wichita Ks.
Posts: 18,492
I never did 357sig, but I do 10mm that is as fast.

For 45acp, 40, and 9mm I use extreme plated, and have been happy with them.
When I started 10mm my shots were more scattered.

I tried the double plated concave base DPCB and saw marked improvement.
I have been using Red Dot just using it up. I have become doubtful of accuracy with it, and plan to try some Power Pistol. I think also some Montana bullets.

I have figured out 10mm and 357sig are a different level, and take more careful experimentation.
45, 40, and 9mm are a lot more forgiving, and hold accuracy.
dwg13013 is offline  
Old 12-28-2016, 06:09 AM   #11
Supporting Member
Supporting Member
 
RatBikeRod's Avatar
 
Join Date: Nov 2016
Location: The Great State of TEXAS
Posts: 892
Got my bullets in and have been prepping both 357 and 9mm brass while I am off this week. Slowly getting back into the groove. Took a bit of trial and error on the 357 resizing and bullet seating to get it just right. I picked up a 357 gauge so I could quickly check how my rounds were working out.

Need to decide on powder and loads but have been too busy to even look up data so far this week and its already half over~! Such are vacation weeks!

So if you have any pet loads, let me know what they are.
RatBikeRod is online now  
Old 12-28-2016, 06:27 AM   #12
Member
 
rtmills's Avatar
 
Join Date: Mar 2015
Location: Texas
Posts: 79
I have loaded 1000's using Berry's 124 gr FP and have never had any problems. They seat well and are more accurate than I am.
rtmills is offline  
Old 12-28-2016, 07:06 AM   #13
Senior Member
 
slayer61's Avatar
 
Join Date: Jul 2014
Location: NORCAL
Posts: 2,266
Quote:
Originally Posted by RatBikeRod View Post
Got my bullets in and...<snip>

So if you have any pet loads, let me know what they are.
I'll let you know after I get back from the range. Taking tomorrow off work to chrono some 357 and 10mm.

357 loads using Hornady HAP in 115 & 124 and Montana Gold in 125

Powders from BE-86, CFE, Longshot etc.

I'm gonna be there for a little while!
slayer61 is offline  
Old 12-29-2016, 10:43 AM   #14
Senior Member
 
SIGAZ's Avatar
 
Join Date: Jan 2013
Location: AZ
Posts: 467
Quote:
357 loads using Hornady HAP in 115 & 124 and Montana Gold in 125

Powders from BE-86, CFE, Longshot etc.
The Montana Gold will work well in 357sig. The powders also listed are what I use; CFE Pistol, BE-86, Longshot, Power Pistol. I can give you some of the load data I have used. Let me know if it will help.

Quote:
Ok, going to take you guys advice. Ordered up 1000 Sig 357 in 124 gr from Montana Gold, see how I like them. Not an overly bad price at $130. But I sure do like Missouri Bullet Company's $35 for 500 coated 9mm rounds.
If you are going to pay $130 per 1k, then you have better options. Zero bullets made for 357sig are around $110 per 1k. Then you can also buy RMR JHP's for around $116 per 1k. The RMR will expand and are fun to shoot, but you will have to load it with larger COL due to the shape of the bullet. I load them to 1.150".

I have not tried the MBC coated bullets in 357sig yet, but it seems the shape could not be the best for 357sig. I am currently trying some 122gr FP coated bullets from ACME which has a perfect shape for 357sig. I was able to load it with a 1.135" COL, but still need to test them.

Watch the RMR site in the first quarter of 2017. They are planning to bring out their own 124gr jacketed FP bullet tested to work in 357sig. Their price will probably be around $90 per 1k, which will be perfect for the 357sig reloaders.

Last edited by SIGAZ; 12-29-2016 at 12:28 PM.
SIGAZ is offline  
Old 12-29-2016, 12:23 PM   #15
Senior Member
 
rlherrick57's Avatar
 
Join Date: Apr 2014
Location: Florida
Posts: 377
As others say, the MG 125s are very good. I use AA#9, 12 grains. I am still new to this caliber so I stayed on the low end. Would have to double check but I believe the range for this powder was 11.8 - 13.1. I like this powder as it fills the case so it limits any double charging issues.
rlherrick57 is online now  
Reply

  SIG Talk > Gun Forum > Ammo and Reloading

Thread Tools
Display Modes


Similar SIG Talk Discussions
Thread Thread Starter Forum Replies Last Post
Reloading manual SigNewb Ammo and Reloading 8 10-23-2016 04:52 AM
Issue with reloading for my Sig716 jedgerton Ammo and Reloading 7 09-03-2016 06:30 AM
380 acp reloading help please 9mmshooter Ammo and Reloading 12 08-21-2016 03:20 PM
Good Press for starting out reloading 9mm Sharky1528 Ammo and Reloading 47 08-09-2016 05:07 PM
reloading 22 long rifle Mainer Ammo and Reloading 5 06-12-2016 09:50 AM


Top Gun Sites Top Sites List

Powered by vBulletin 3.8.7
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.6.1
Copyright © 2010 - 2017 SIG Talk. All rights reserved.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.SIG Talk is a SIG Sauer Firearms enthusiast's forum, but it is in no way affiliated with, nor does it represent SIG Sauer, Inc. of Exeter, NH.