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Posted: 9/17/2018 10:24:05 PM EDT
[#1]
Yes, the case expands along its full length, more close to the case head in poorly supported chambers. The brass will spring back a couple of shots, then it won't.
I have done the same thing with bottle neck cases that had gotten stale enough that I thought they were ready to go, but I don't make a habit of it. |
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Posted: 9/17/2018 11:01:01 PM EDT
[#2]
Resizing is to get a loaded round to reliably fit the chamber after the case is fired.
If they fit and function in your firearm without sizing consider yourself lucky. I would not worry about pulling down the 60 loaded cases that have been loaded and not been sized. Yes you want to resize 9mm. |
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Posted: 9/18/2018 12:15:32 AM EDT
[#3]
One of the reasons you resize is to get the neck to the correct diameter for good neck tension.
Which helps with preventing bullet setback. |
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Posted: 9/25/2018 8:26:30 PM EDT
[#4]
Quote HistoryQuoted:
One of the reasons you resize is to get the neck to the correct diameter for good neck tension. Which helps with preventing bullet setback. This is pretty old, but if I’m not mistaken, published by Ramshot powders. 
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Posted: 9/26/2018 4:57:37 AM EDT
[#5]
Not only set-back but forward as well.
Motor |
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Posted: 9/26/2018 4:55:09 PM EDT
[#6]
Overall length makes a difference because the bullet takes up a certain amount of space in the case. If you make the round a little shorter, that also reduces the amount of room inside the case.
While loading shorter can increase pressures, loading longer than the manual's recommended overall length can lower pressures inside the case - which can be a bad thing if the powder requires a certain density to burn efficiently. This is also why you can't just arbitrarily substitute bullet B for bullet A. They could have different enough lengths that you adversely affect pressures. |
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Posted: 9/27/2018 10:25:38 AM EDT
[#7]
Quote HistoryQuoted:
Resizing is to get a loaded round to reliably fit the chamber after the case is fired. If they fit and function in your firearm without sizing consider yourself lucky. I would not worry about pulling down the 60 loaded cases that have been loaded and not been sized. Yes you want to resize 9mm. Getting that neck sized correctly for proper OAL is also a big deal. |
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Posted: 9/27/2018 10:49:52 AM EDT
[#8]
If the fired cases drop into your chamber and "plunk," you could skip the sizing step.
For me, this only occurs with very light loads As above, the real SAFETY issue is bullet set-back during feeding and, just like EVERY cartridge you load, you should be pushing each seated bullet down into the case with thumb or finger pressure and rejecting any rounds where the bullet moves, even slightly. The other issue with loading unsized cases if that the rounds are not likely to chamber in any other gun. |
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Posted: 9/28/2018 10:51:15 AM EDT
[#9]
Most of my 223 brass that fits a chamber gauge after firing from my AR, could I just use a neck sizing die and not full length size?
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Posted: 9/28/2018 11:53:33 AM EDT
[#10]
Always fl size in AR's , the one case that gets stuck in you chamber can ruin your day (or your life !!!!)
Later John |
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Posted: 9/28/2018 1:41:17 PM EDT
[#11]
Quote HistoryQuoted:
Most of my 223 brass that fits a chamber gauge after firing from my AR, could I just use a neck sizing die and not full length size? Shooting an AR? Go ahead as long as you know how to motar out a case stuck in the chamber. |
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Posted: 9/28/2018 4:02:37 PM EDT
[#12]
Quote HistoryQuoted:
My thoughts as well! Pure luck. Getting that neck sized correctly for proper OAL is also a big deal. Quote HistoryQuoted:
Quoted:
Resizing is to get a loaded round to reliably fit the chamber after the case is fired. If they fit and function in your firearm without sizing consider yourself lucky. I would not worry about pulling down the 60 loaded cases that have been loaded and not been sized. Yes you want to resize 9mm. Getting that neck sized correctly for proper OAL is also a big deal. And loading longer may not reduce pressure as the bullet gets closer to the start of the rifling. |
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