.40 S&W base bulge

Discussion in 'The Ammo & Reloading Forum' started by clepidus, Nov 24, 2012.

  1. clepidus

    clepidus New Member

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    I am starting to notice a slight bulge in the base of my .40 brass. I have loaded these about 3 times now and am thinking I should buy a die to get them in spec. Does anybody know of a good base sizing die? Is the Redding G-RX base sizer any good?
  2. aa1911

    aa1911 Active Member

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    yes, buy it. What gun are you using? Glock?

    if so, there's a bunch of threads on here concerning the glock buldge.

    it's a bit time consuming but cheap insurance; also, stay on the lower end with the powder
  3. steve4102

    steve4102 Former Guest

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    I have the Redding G-RX steel die. I use it on all my 40 and 10mm brass. It works great, but you have to lube the case. They make a new one now in Carbide for a bit more $$, but no lube required.

    Lee makes a Bulge Buster kit that pushes the case through their Lee Factory Crimp die and does the same thing. It is less $$$ than the Redding, but.
    I have tried the BB method pushing the case through the LFCD and I found it to be a little on the small side and took way more effort than the Redding die.
  4. 312shooter

    312shooter Active Member

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    Debulging can be done easily with a Lee Factory Crimp Die. Remove the guts of the die and push the casings through the die backward (headfirst). Use a .223 casing and shell holder to do the pushing, it goes rather smooth. I've never needed to buy the GRX setup, but I'm sure it does fine.
  5. aa1911

    aa1911 Active Member

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    +1 for getting the carbide version of the Redding, I use it and no need for any lube although I do some light lube about every 50 cases or so just because. But ran the first few thousand through dry just to see, no issues at all. IIRC, it wasn't hardly much more than the original one they put out.
  6. JLA

    JLA Well-Known Member

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    funny how nothing i load ro shoot does this.. only the .40 and only in glocks.. WTH??
  7. soundguy

    soundguy Well-Known Member

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    are these the ones witt he partiall unsupported chamber I hear of?
  8. clepidus

    clepidus New Member

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    I don't shoot a Glock myself but my friend does and that is the problem. I load for him too and the brass gets mixed up when we shoot together. My XD doesn't have the problem that I can see anyway.

    I guess I will go ahead and get the G-RX and try and keep brass a little more separated when we shoot.

    Thanks for the input.
  9. aa1911

    aa1911 Active Member

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    it does only seem to be a Glock and .40 cal specific that I've heard anyway. My Glock 9mm don't do this and I've not seen the .45 ACP or GAP do this either in the ones I've fired (factory ammo).

    It really doesn't look like that much is unsupported in the chamber but it's enough and more than anyone else's gun.

    so a little extra work to reload for a gun that is (in theory) more reliable feeding. Remove the bulge, don't load full power loads and you'll be just fine.

    Another option is an aftermarket barrel such as Lone Wolf, Bar-sto, storm lake, etc... some mixed reviews but overall most of them have decent reliability and support more of the chamber to almost if not altogether eliminate the dreaded bulge.
  10. Appliancedude

    Appliancedude Active Member

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    Ok, explain this to me. I don't have a auto I load for. Why does the resizer die not fix this. :confused:
  11. aa1911

    aa1911 Active Member

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    a standard resizing die (even full length) does not go all the way down to the base of the cartridge, you can see it from the squeeze marks, stops about 3/16" from the base at least.

    the bulge happens to occur in that exact same (untouched) spot, so the push thru die resizes the entire thing from start to finish, squeezing that bulge back to something close to orginal intended size.
  12. Appliancedude

    Appliancedude Active Member

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    Got it. I've collected a few hundred of them (range brass) have no idea what they were shot out of. I've tumbled them and tossed them in a bucket. Might have to go inspect a few of them. Now I'm curious
  13. aa1911

    aa1911 Active Member

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    easy to spot the Glocks, look for a rectangular strike on the primer. Not sure what else is using anything similar anymore, but glock rounds are easy to spot.
  14. Appliancedude

    Appliancedude Active Member

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    Thanks. when I get a chance I'm gonna inspect a few of them. I've been collecting range brass for the day I get a gun that will shoot them. Then I'm ahead on the brass situation. I'm sure there is some in there.
  15. aa1911

    aa1911 Active Member

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    I hoard brass, even if I don't have the caliber yet, I scrounge all I can because eventually I will either have that caliber or trade it for stuff I need in what calibers I own.

    Brass gold!
  16. Appliancedude

    Appliancedude Active Member

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    Exactly. Once I get enough of a certain round, it gets its own container. I deprime it all with my universal, and tumble it. That way I can give it a once over.
  17. soundguy

    soundguy Well-Known Member

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    same here. if I even think Imay ever own or laod for it.. i keep it.

    i have die sets for cartridges i don't even reload yet.. but do have a gun .. and will stasrt relaoding for them when I get enough built up brass.
  18. erikk

    erikk New Member

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    Get the LEE Bulge Buster Kit and a SS press if you want to keep it simple. I only use range brass in my 45's & encounter that situation all the time. "PLUNK" test all your rounds & use the kit for the ones that don't "PLUNK"
  19. howlnmad

    howlnmad Well-Known Member

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    You get bulges in 45 brass? What are you shooting them from if you don't mind?
  20. aa1911

    aa1911 Active Member

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    I was wondering the same thing. Even the Glocks don't bulge the .45's that I've seen, only the .40's

    what gun?

    I would also run ALL your .40 brass through the base sizer, not just ones with visible bulges. Many with bulges will still fit easily into the chamber.
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