355 Super

Discussion in 'Handloading and Reloading' started by tightgroup tiger, Jun 15, 2021.

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  1. tightgroup tiger

    tightgroup tiger Member

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    I just found one of these mixed in with my brass.
    It seems to be the same as a 9mm Luger and in looking it up on IAA forum it seems to have been a factory load for 9 Major.
    https://forum.cartridgecollectors.org/t/355-super-info-needed/6339
    355 Super.jpg
    It Mic's the same as my other 9mm brands and looks to have been made by Starline but Starline doesn't list them on their website.
    Has anyone else run across these?
     
    merlynski, lordpaxman and kcofohio like this.
  2. kcofohio
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    kcofohio Contributing Member

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    Interesting. I have never seen or noticed such headstamp before.
     
  3. fxvr5

    fxvr5 Member

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  4. DocRock

    DocRock member

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    It’s for loading hot 9mm loads to compete in IPSC Major Power factor.

    Good brass, load as per 9mm SAAMI spec unless you have a custom pistol that you are certain allows hot ++P loads.
     
  5. tightgroup tiger

    tightgroup tiger Member

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    I imagine it is good brass if it is purpose built for 9mm Major. The article I read about it said that the brass is a little longer than normal 9mm luger brass but still falls in 9mm luger brass specs.
    That sounds like match grade brass to me.
    I'll have to watch for more of it. I doubt Starline will own up to making it and actually ever sell it to us reloaders, due to the high pressure that is associated with 9 Major and people that don't know that 9 Major isn't safe to shoot out of 9 Minor guns.

    This headstamp is a new one on me. I mic'd the case out and it is 9mm luger specs as far as I can tell.
     
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  6. lordpaxman

    lordpaxman Member

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    Thanks for the info. I haven’t seen that HS before, but I’ll admit if it gets through the sorting pan and looks close enough to 9mm it’ll get through the press. About the only time I’d notice is when doing the 100 round gauge. Most of the major gamers at the local match are using .38 super or super comp.
     
  7. Blue68f100

    Blue68f100 Member

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    Have you checked the internal volume?

    The longer length does not bother and is actually at max spec for 9mm. It a common practice in todays mfg to use a little raw material as possible to save cost. If you ever measured new brass most all is bare min. Out of 5k+ that I measured one time I only found 3 pieces that were max length. About 50 that were within 0.003" All others were on a avg 0.006-0.008" short and some did not even meet min spec.
     
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  8. rfwobbly

    rfwobbly Member

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    I believe that is from Atlanta Arms. They have some real wizards developing their loads and reloads. This is brass they use to distinguish their "9mm Open" ammo, which is physically the same size as SAAMI spec 9mm. I shoot at a local Atlanta club and this brass is everywhere.
     
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  9. GooseGestapo

    GooseGestapo Member

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    Starline will stamp the case head with whatever you want if you buy a large enough quantity.
    There are a number of smaller ammo manufacturers that utilize Starline custom stamped brass.
    Atlanta arms is one. Precision Delta is another.

    There’s NO difference between the cases. +P, or non +P.
    Starline says so on their website.

    Starline IS the best pistol brass you can buy. The US Army Marksmanship unit uses Atlanta Arms ammo custom loaded for them. They also use some Black Hills, which uses Hornady brass.
     
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  10. tightgroup tiger

    tightgroup tiger Member

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    No, I didn't check the internal volume, I looked down inside it and it looked the same as most of the other 9mm I have. I only found one so I'm not to worried about it. More curious than anything.
     
    kcofohio likes this.
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