In need of a mold for .458 Socom

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I need a mold for .458 Socom 500 plus grains for subsonic loads.  Thanks for any help

Albert

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[Mike B.Moderator]

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Have you tried to go to the NOE store and look at what is available under the appropriate diameter or diameters involved in your request?

https://noebulletmolds.com/site/product-category/458-460/

Just a thought … Your call on how to proceed…

Take Care, & Stay Safe…

• This reply was modified 2 years, 8 months ago by Mike B..

[Mike B.Moderator]

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You need to perhaps start out & pick out a bullet shape so as to start to have a length that might feed an AR 458 SOCOM… to reach ~ 500 + grains they will tend to be at least 1.2 to 1.4 inches in length… the 458 SOCOM. If you are going to utilize an AR platform the combination also will need to tend to feed reliably …

Besides this the 458 SOCOM also tends to be a rather small cartridge case… so that 500 + grain projectile will most probably tend to stick quite a ways into the powder chamber (~ .400 to .500 “) of the 458 SOCOM case’s 1.187 ” length powder chamber …

In addition if one goes to Loaddata (whether one subscribes to that data base or not… The plethora of potential combination types in 458 SOCOM out of that plethora of potential loads derived only one of those entries shows a 500 grain jacketed bullet as potentially applicable…  I subscribe to that data base so in you want an annotated copy of that single combination you will have to PM me as the new data base will still not allow me to add an annotated image to this reply…

Finally if one is staying subsonic … You will need to specify what powders that you might have to fill the remainder of said ~ half filled chamber with the rear end of those 500 Grain + projectiles … & still give you a potential clean burn in the barrel length of your choice…

Without an appropriated powder charge & type … to mate up properly …  with the chosen projectile … You still most probably will be stuck at home … short of the range …  with a combination that may not work reliably nor function said firearm without leading …

Last but not least … Traditional lubes which tend to be needed down the line …  will tend to contaminate what ever powder charge that is in the 458 SOCOM cartridge case to produce less that 1125 FPS… & still cycle reliably an AR …  without spiking the pressure … there are not to many powder & bullet combinations that may have a clean burning chance to make a successful load combination …

To go with a traditional lube option tends to put this particular option on the side line … due to the selected cast bullet weight … you are left with only a potential powder coat option …  to prevent leading… Thus the chosen bullet weight … Tends to look like you may want to rethink the bullet weight … Your call on that potential option…

I tend to believe that most of the Loaddata loads were for a 300 to 350 grain projectile or less … to get a variety of potential powders, & projectiles (cast or otherwise) … that will also tend to preform reliably in an AR… if indeed that is your firearm type of choice … The subsonic part is easy … you have bulky powders like Trail Boss that can bulk up the remainder of the 458 SOCOM chamber & still stay below sonic levels… Whether those loads will reliably cycle an AR tends to remain an unanswered question at this early point in time … Now a bolt action rifle is another animal indeed that does not rely on pressure or perhaps the SAAMI cartridge COAL to function reliably …

Your call on that option…

Take Care, & Stay Safe

[albert angelParticipant]

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Thank you for your time and all the info.I have found several load recipes for subsonic loads and 2 or three of these call for bullets of almost 600 grains.  Watched many YouTube videos that say they cast the bullets from molds you custom built for them by NOE.   This is why I was surprised when I went to the website and did not find the molds they bought from regular production molds not the custom made ones

Thanks

Albert

[Mike B.Moderator]

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You are welcome …  I’m glad that I hopefully pointed you towards the right direction … As I said originally … Your call on how to proceed … Just remember that the heavier the cast bullet the more of it will need to be inside the powder chamber of the 458 SOCOM … I’m just a forum member like your self …  who enjoys. casting , reloading , shooting, & discussing potential options for the aforementioned subjects …  Remember also to verify the loads with a reliable source …  I look forward to your publishing your found data on the NOE Forum 2  … & what your research has produced …  a 600 Gr NOE mould would tend to be around 1.430 with only ~ .440 of that particular mould’s OAL as a nose protruding out of the 458 SOCOM’s cartridge case. Good luck & good shooting …

Last but not least; I noted  this evening that the 458 SOCOM is not as of yet a SAAMI standard … As a result of this the cartridge COAL as far as different sources are concerned. .. varies from 2.015 in Loaddata to 2.230 in Quick Design … I used the shorter of the COAL dimensions in my calculations…

This rather large … difference in COAL may explain why some of the data that I found tends to vary greatly in both COAL , & design pressures … when the data is run once again using another source references … to cross check the data obtained… It may also explain why the videos tend to show acceptable loads with out potentially explaining why …

You will most probably need to verify what you are working with at least as far as  rifle cartridges chamber is concerned , & the load intel used to develop the load … as far as the COAL concerned …  from those videos that you said that you saw… as the differences in COAL tend to make a very great set of differences in the amount of chamber available to the powder capacity…  It should also be noted that the cartridge case OAL tended to remain the  same  @ ~ 1.573 to 1.578

Your call on how to proceed …  one version of an acceptable load, & pressure curve … Please note that this final data may be of a great difference once SAAMI finally makes its decision on what the official COAL is going to be …  and sets up the SAAMI standard & dimensions accordingly.

Nuff said.

Take Care, & Stay Safe…

• This reply was modified 2 years, 8 months ago by Mike B.. Reason: No official SAAMi Std as of 9-10-23

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