Is Federal’s New 30 Super Carry a 32 ACP Magnum?

Discussion in 'Handguns: General Discussion' started by jski, Jan 9, 2022.

  1. 12Bravo20

    12Bravo20 Member

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    No basis at all other than from personal experience from shooting a variety of different pistol and revolver calibers at indoor ranges.

    AND that is why I said "I don't see"

    It would have been different if I would have said something like "I know" because none of us know yet. Please do not take my words out of context.
     
  2. Kleanbore

    Kleanbore Moderator Staff Member

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    Okay.

    The similarity between the .30 SC and the .327 Federal Magnum, which we are told sounds like dynamite, gives me a different expectation.
     
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  3. WrongHanded
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    WrongHanded Contributing Member

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    So what exactly makes one pistol cartridge louder than another? Velocity, internal pressure, or something else?
     
  4. Kleanbore

    Kleanbore Moderator Staff Member

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    Pressure and gas volume--louder with a shorter barrel.
     
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  5. P Flados

    P Flados Member

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    I have posted this a number of times. The 30 SC muzzle blast is very similar to the 9mm.

    First I ran Quickload. Although it has a higher chamber pressure, the pressure falls off more rapidly and is down to about the same pressure as the 9mm when it leaves the barrel.

    Then I watched a video with a guy shooting SD ammo in 30 SC and 9mm in the same gun. They looked the same and the guy indicated they were very comparable from his point of view for both blast and recoil.

    The 327 (I have one) is nasty will full power ammo. It has a lot longer case and uses slower powders for full power.
     
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  6. Mosin77

    Mosin77 Member

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    I agree with Kleanbore that excessive loudness may well be a concern with this cartridge. It’s a significant concern for me because I like to hear things, and if given the choice of two adequate cartridges for self-defense, would be most likely to choose the one less likely to permanently damage my hearing after the fact in the event I actually need to use my firearm.

    I notice that .32 (s&w long, acp) .38spl, .45acp do seem quieter than the supersonic crack of 9mm or .357. I personally choose the heavier, 147gr subsonic for this reason in 9mm ammo. We are talking about a significant pressure increase over 9mm. We probably won’t know for sure until some decibel testing is done. Which may be a while. It’s very hard to find good data about the loudness of different cartridges.
     
  7. mavracer

    mavracer Member

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    An understanding of pressure curves and seeing the small powder capacity of the 30SC my SWAG would agree with 12Bravo20's assumption.
     
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  8. Kleanbore

    Kleanbore Moderator Staff Member

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    I have not seen that. That could be very valuable information.
     
  9. mavracer

    mavracer Member

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    The oonly similarity is diameter and pressure the 327 has over 50% more powder capacity and uses slower powder add to that the blast from the cylinder gap and you're gonna have 2 very different animals.
     
  10. twarr1

    twarr1 Member

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    More rounds in a standard size magazine. It has that going for it, and that’s enough for a lot of buyers. (Not me)
     
  11. WrongHanded
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    WrongHanded Contributing Member

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    Pressure at the point the bullet leaves the barrel should be something that can be compared and contrasted (loosely) based on velocity and bullet weight. Seems that if you have a heavier and a lighter bullet, both leaving the same length barrel at the same velocity, the heavier one (to my mind) likely has more pressure behind it at the point it exits the barrel. What happens before that is meaningless regarding muzzle blast, because the blast hasn't yet happened.

    Gas volume, assuming a complete burn and similar charges of similar powder (re: burn rate) should be....well, similar. I don't see any reason to suppose vast differences in powders or charge weights considering that the smaller case has a lighter bullet and a higher MAP.

    I'm not anticipating any kind of overwhelming muzzle blast from the 30SC. Seems like no big deal.
     
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  12. 12Bravo20

    12Bravo20 Member

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    We can also use 9mm as an example. 9mm shot out of a semi-auto pistol will have a different level of noise compared to the exact same round fired from a revolver. As stated, this is due to the cylinder gap.

    The shop owner that runs the indoor range can definitely tell the difference in both the sound and loudness when I shoot my 22WMR Kel-Tec PMR30 pistol versus when I shoot my different 9mm pistols. And the register/gun counter is at the opposite end of the building. I know that is somewhat subjective but the owner does make the comment all the time to me.
     
  13. TTv2

    TTv2 Member

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    I would think that a revolver with a near .01" cylinder gap shooting a Magnum is going to have a lot of blast, but a semi auto shouldn't have so much more to be uncomfortable.

    Really, I have a lot more reasons to turn down .30 Super than simply because it's loud.
     
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