458 Socom

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1977kaw

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Oct 27, 2006
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hello

I have purchased a RRA upper and intend to reload once fired brass - after my orders have been received
I want to use lead = 300 or 350 gr cast
ANY help or guidance would be greatly appreciated
TIA
 
Welcome to the caliber!
I recommend registering at www.458socomforums.com, everything you will need to know about the 458 can be found there.
As for a few starting pointers, RRA uppers can be hit and miss as far as function. I believe they use the correct reamer, so your chamber should be to the original Teppo Jutsu specs.
The 458S was designed to operate with a standard carbine buffer and spring.
I know you said once fired brass but if you ever get a hold of brand new brass, they need to be run through a sizing die before loading. Do not skimp on the case lube, stuck cases are extremely common, I use Hornady unique.
For cast bullets case flare is a must, I use the NOE expander inserts. Removing that flare is equally as important, the Lee collet style factory crimp die does great. I don't actually apply any crimp into the bullet, just ironing out the additional flare back to normal case mouth diameter.
Tromix slotted case gauge is an extremely useful tool when loading cast, especially powder coated bullets.
 
I load my .458 with commercial available HC .405g gas check 45/70 bullets! GOOD STUFF
 
Telum Pisces said:
Hmmm, way to open of a question. Do you have a reloading manual?
Click to expand...
yes I do I am interested in .458 vs .459 > resize the .459?
powder coating > resize after coating?
load/ powder preferences for lead vs jacketed
I have had issues seating/ crimping with handgun loads hence the preference of lead
 
bsev81 said:
Welcome to the caliber!
I recommend registering at www.458socomforums.com, everything you will need to know about the 458 can be found there.
As for a few starting pointers, RRA uppers can be hit and miss as far as function. I believe they use the correct reamer, so your chamber should be to the original Teppo Jutsu specs.
The 458S was designed to operate with a standard carbine buffer and spring.
I know you said once fired brass but if you ever get a hold of brand new brass, they need to be run through a sizing die before loading. Do not skimp on the case lube, stuck cases are extremely common, I use Hornady unique.
For cast bullets case flare is a must, I use the NOE expander inserts. Removing that flare is equally as important, the Lee collet style factory crimp die does great. I don't actually apply any crimp into the bullet, just ironing out the additional flare back to normal case mouth diameter.
Tromix slotted case gauge is an extremely useful tool when loading cast, especially powder coated bullets.
Click to expand...

thanks I have I am posting on a few forums I have been an inactive member here for awhile and recalled quality members an information
thanks for your response I have ordered the Tromix case gauge - glad I didn't waste money otherwise the Lee crimp die as well
 
1977kaw said:
yes I do I am interested in .458 vs .459 > resize the .459?
powder coating > resize after coating?
load/ powder preferences for lead vs jacketed
I have had issues seating/ crimping with handgun loads hence the preference of lead
Click to expand...
Your best way of knowing will be to slug your barrel but at the very least you should need to size .459". I use a "460" sizing die and my bullets measure .4595 - .460.
Sizing order depends on what i'm loading, if just plain base bullets then cast, coat, size. Sometimes with gas check bullets I will seat the checks before coating and sizing to encase the check for shooting with a suppressor.
I load the same powders no matter jacked or cast, for supers I use IMR4198. It suffers some velocity compared to H110/W296 or Lilgun, but I have seen less velocity spreads with it.
I've never had an issue seating/crimping jacketed or lead other than needing to flare the case to keep from shaving lead off during seating. But I seat and crimp in two separate steps, trying to do both in the same step can cause issues if the die is not setup correctly.
As an "item" I prefer jacketed bullets, but the main reason I cast is I enjoy tinkering and doing things myself. The second reason I cast is it makes me believe i'm saving money :rofl:

1977kaw said:
thanks I have I am posting on a few forums I have been an inactive member here for awhile and recalled quality members an information
thanks for your response I have ordered the Tromix case gauge - glad I didn't waste money otherwise the Lee crimp die as well
Click to expand...
No problem, happy to help.
 
my last chron for 458SC using 405g HC gas check was 1730 fps using Lil-Gun.

18” barrel
 
This was actually the first AR I built. I needed it to help control the hogs where I live. My back porch to the feeder is ~95 yrds. Packs a good punch, the hogs know when they get hit with it. I run a brake on mine mainly since I do most all my shooting at night. Without the brake you want be able to see down range till all the smoke clears. With the break you never loose sight. All I use is a VRX 2x7 with the dot turned on real low. I have lights around my feeder to aide in seeing if the moon is not not out. I see real good at night, better than most. With the barnes I have gotten 2 for one. Nerves system hit on both. Dropped on the spot and did not move.
 
Blue68f100 said:
This was actually the first AR I built. I needed it to help control the hogs where I live. My back porch to the feeder is ~95 yrds. Packs a good punch, the hogs know when they get hit with it. I run a brake on mine mainly since I do most all my shooting at night. Without the brake you want be able to see down range till all the smoke clears. With the break you never loose sight. All I use is a VRX 2x7 with the dot turned on real low. I have lights around my feeder to aide in seeing if the moon is not not out. I see real good at night, better than most. With the barnes I have gotten 2 for one. Nerves system hit on both. Dropped on the spot and did not move.
Click to expand...
that sounds FUN!
 
My neighbors know when I fire it, for it has a totally different sound. The big bore has a very unique sound. My closes neighbor is 1/4 mile away. I had the opportunity to shoot early one evening when they were home watching tv. His wife heard the gun from inside there house and asked her husband "What the hell was that". He laughed and said it was me shooting my 458 SOCOM, at a hog. He knows I don't shoot it at night to just be shooting. All my neighbors shoot around here.
 
Kevin Rohrer said:
Get a copy of Lyman #50.

I tried various powders w/ 300gr lead boolits, and settled on IMR4227 for mild recoil loads.
Click to expand...
I would love to see the lightest .458 going the fastest, load. I’m thinking something like 200g going 2800
 
Dumb question from a .458 noob... is that a radius shoulder... or is it so short it just looks that way?

What kind of brass life do you expect from cases with reasonable loads? Are there issues with case head separations?
 
Blue68f100 said:
My neighbors know when I fire it, for it has a totally different sound. The big bore has a very unique sound. My closes neighbor is 1/4 mile away. I had the opportunity to shoot early one evening when they were home watching tv. His wife heard the gun from inside there house and asked her husband "What the hell was that". He laughed and said it was me shooting my 458 SOCOM, at a hog. He knows I don't shoot it at night to just be shooting. All my neighbors shoot around here.
Click to expand...

Sounds like you have great neighbors! :thumbup:
 
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