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Posted: 12/3/2012 7:21:07 AM EDT
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Well I bought some loaded ammo a while ago at a Gunshow from a Small reloading company as I did not have my loading set up going yet (Last parts show up tomorrow.)
Now the question(s) I have the SBR .458 Case gauge. I took my Wilson barreled .458 to the range to test the loads, I fired four rounds, I checked the primers and two were pierced. I got back from the range and dropped the remaining 17 rounds into the chamber gauge. They are all loaded long and won't drop flush with gauge (something like the rim thickness or greater outside the gauge.) Correct course of action is to pull them down and load them with a good known charge OR just set the bullet back enough for it to chamber? |
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If you already have pierced primers, setting the bullet back is only going to increase pressure and bring you closer to detonation! I'd break them down and reload. Even if you don't know what powder is in there, you could break them down, reduce by 10%, then reload. |
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I never thought to ask about the powder they use for their loads. I am going to pull down the loads and see what I have. I can tell that the loads vary between case as some the powder can be heard if you shake the case and others no movement from the powder is noticeable.
I will account what I do anyways so I can get started on my own loads soon. |
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Not a .458 SOCOM user so looked up the case drawing. There is a shoulder, albeit small, and there is a rebated rim. So, it seems to me that the case should establish position in the chamber based on case shoulder position from the case headface surface.
The bullet should not be restricted in forward motion upon firing until it starts out of the case, picks up a little momentum then engages the rifling lands (ie. traverses the free bore). Color the bullet of one of the strange gun show reloads with a sharpie. Load and eject without firing. If there are any land marks (shiny marks equally spaced circumferential around the bullet ogive) then yes the bullet is seated too far out, ie. COAL is too long. If there are no marks on the bullet, then COAL is OK. If COAL is found OK, then the only fix is to pull bullet, dump powder, and resize and retrim to get the shoulder bumped back closer to the case headface. Be sure and remove sizing lube from the exterior of the case, and minimize liquids inside the case, in hopes of saving the installed primer (use the dry mica for inside neck lube when sizing). Finally, it is unwise to ever buy any reloads made by Joe Blow's Georgia International Ammunition Supply or Joe's wannabe's at a gunshow. 
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If it were me, I would break down those rounds, and throw out the unknown powder. Resize, trim, and debur the cases to proper spec. Reuse bullet (and primers if you want). But load with a known powder at a published charge level. Work up your load. You have learned the lesson of buying reloads at the funshow. Good luck. |
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Quoted:
If it were me, I would break down those rounds, and throw out the unknown powder. Resize, trim, and debur the cases to proper spec. Reuse bullet (and primers if you want). But load with a known powder at a published charge level. Work up your load. You have learned the lesson of buying reloads at the funshow. Good luck. Sadly especially with the .458 socom, it was a bullet I won't be loading for, so it looks more like I will load up a ladder with some reloder 7 or Lil'Gun. I'll have maybe 10 good loads after that. Lesson Learned. |
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I reload for my .458 SOCOM's, both my rifles are 16'' 1x14 twist carbine length. RRA & Wilson barrel. .625 groups @ 100 yards on a good day with this load.
case length = 1.57 OAL = 2.250 Starline Brass Barnes 300GR TTSX CCI 350 Magnum Large Pistol Primers 36.0 GR RL 7 edt: REDDING die's # 1 shellholder. Ive noticed a none sized round will not drop into the SBR case gauge, I missed resizing one once but it still chambered and ejected. Lots of good info here 458 SOCOM Forum 
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Big-Al, That looks like three AR buffer weights against the backstop in your photos. Are those for changing out the lower to tune if for the different calibers you shoot with the uppers? The black one is a PSA standard carbine buffer and the other two are an H and H3, Thay are left overs from tuning my 18'' 6.8 SPC witch i ended up using an H2 buffer. On my Wilson .458 i used a carbine Hydrulice Enidine AR-Restor buffer, using that and an addjustable gas block it has very little recoil. |
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