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  #1  
Old 12-31-2009, 08:15 PM
jr45acp jr45acp is offline
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Minimum Overall Length For 45ACP




I'm not a reloader and really don't plan to be. I have, however, a need to know the minimum OAL for 45ACP Ball and JHP ammo. A bit of help from those who reload is most appreciated.

Happy New Year to all.
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  #2  
Old 12-31-2009, 08:52 PM
Fazer386 Fazer386 is offline
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I'd just Google one of the reloading sites. They give the bullet type, load & OAL. I'd browse several sites & look for consistent information.
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  #3  
Old 01-01-2010, 07:41 AM
jr45acp jr45acp is offline
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Excellent advice Fazer! I've had the flu since 12/22, so my thought processes aren't what one would call very good at the moment.
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  #4  
Old 01-01-2010, 02:32 PM
AzDave AzDave is offline
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According to SAAMI it's 1.190 min and 1.275 max
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Old 01-02-2010, 07:09 AM
fltbed fltbed is offline
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I’m just curious. If your not a handloader, why do you need to know the minimum OAL?

Jeff
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  #6  
Old 01-02-2010, 07:43 AM
MSgt Dotson MSgt Dotson is offline
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Most FMJ ball ammo is 1.24-1.265"....; most 200/230 gr JHP is 1.19-1.24", varies tremendously with jhp profiles. There is no 'set in stone' finite minimum length, which depends on powder.
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  #7  
Old 01-02-2010, 11:02 AM
jr45acp jr45acp is offline
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Quote:
Originally Posted by fltbed View Post
I’m just curious. If your not a handloader, why do you need to know the minimum OAL?

Jeff
Jeff, the reason is I've got a number of rounds that with a keen eye and set more deeply than others! My concern is that I don't want to chamber and fire a round that may result in catastropic failure
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  #8  
Old 01-02-2010, 12:42 PM
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Moving this to reloading, since they'll give you better answer.
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  #9  
Old 01-02-2010, 12:52 PM
AzDave AzDave is offline
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Quote:
Originally Posted by jr45acp View Post
Jeff, the reason is I've got a number of rounds that with a keen eye and set more deeply than others! My concern is that I don't want to chamber and fire a round that may result in catastropic failure
If other rounds from the same box or manufacturer (type...i.e.ball) are significantly longer, i suggest disposing of the short ones. You never know exactly what the load is and if overpressure will occur.

When in doubt, toss it out.
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  #10  
Old 01-02-2010, 12:52 PM
MSgt Dotson MSgt Dotson is offline
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I would not use them if the bullet is setback so much that the .451" diameter of the bullet is now below the casemouth, or case is now visibly bowed outward, but, .02" shorter should be ok; .08", too much, IMO
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Old 01-02-2010, 12:58 PM
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You want only the cylindrical part of the bullet in the case. Regardless of loaded OAL or bullet OAL, you want none of the tapered part of the bullet below the case mouth. When comparing rounds that started out at the same OAL, I probably would cull any that appear shorter, and shoot those on the next cycle; that is, I wouldn't try to come up with go/no-go OALs, but rather don't reuse any that appear shorter. I wouldn't toss them, but I wouldn't cycle them more than the one more time it would take to shoot them. With my defense loads, I'll generally not rechamber a round that's been fed before. The round that's ejected from the chamber goes to the bottom of the carry mag, and a "fresh" one is cycled into the chamber.
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  #12  
Old 01-02-2010, 02:31 PM
herd48 herd48 is offline
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Do not hand cycle ammo. And I am just guessing this may be the problem. You will end up not wasting ammo. Continuous hand cycling will eventually cause set back. If it's shorter than the other factory rounds. You may not want to shoot them. If my assumption was incorrect......just ignore the post. 9 of 10 times with factory ammo. This is the cause. Factory ammo is highly reliable.
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  #13  
Old 01-03-2010, 07:54 AM
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Quote:
Originally Posted by jr45acp View Post
Jeff, the reason is I've got a number of rounds that with a keen eye and set more deeply than others! My concern is that I don't want to chamber and fire a round that may result in catastropic failure
That’s what I feared.

As others have said, “When in doubt throw it out”. There are way more variables involved that just what SAAMI says the Minimum OAL can be.

Around 30 years ago Speer published some data from the 9mm Luger cartridge. IIRC, with a max safe SAAMI pressure load, loaded to a max SAAMI OAL, they started reducing the OAL (to simulate bullet set back from repeated chambering) and firing them in a pressure test barrel. By the time they reached the SAAMI minimum recommended OAL that load had almost tripled in chamber pressures.

Now granted the 9mm Luger is a rather extreme example compared to the relatively low operating pressures of the 45 a.c.p., but you get the idea of what could happen.

Be safe.

Jeff
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  #14  
Old 01-03-2010, 09:29 AM
msd msd is offline
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real good question noone has asked yet is what ammo is it? Is this factory ammo or reloads someone has given to you? Unless i missed it posted previously, I didn't see no mention of it .
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Last edited by msd; 01-03-2010 at 09:31 AM.
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  #15  
Old 01-03-2010, 09:58 AM
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real good question noone has asked yet is what ammo is it? Is this factory ammo or reloads someone has given to you? Unless i missed it posted previously, I didn't see no mention of it .
45 acp. Posted by the OP in the header.
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  #16  
Old 01-03-2010, 10:10 AM
msd msd is offline
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Originally Posted by fltbed View Post
45 acp. Posted by the OP in the header.
No is it American Eagle or Federal or a foriegn brand or someones reloads they made up and gave to him. I knew it was 45 ACP.
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  #17  
Old 01-03-2010, 11:42 AM
AzDave AzDave is offline
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Doesn't really matter what brand it is. Unless, you know what powder is used and how much you can't determine what the C.O.L. should be.

Someone's reloads make the matter worse.

As I said....WHEN IN DOUBT, THROW IT OUT.

If a reloader, you could pull the bullet and use the case over. I have a whole tin with questionable rounds just waiting to be pulled.

Someday.....
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  #18  
Old 01-03-2010, 01:24 PM
skinman skinman is offline
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I set my 230 gn. reloads at 1.26± .02 in. I mike about every 10th round to make sure that they are within this tolerance. I use the same setting for RNL, FMJ, or plated bullets.

I just did a quick sample check of my factory stock and Fiocchi was the least at 1.24± .02 in. Remington, Aquila, and CCI Brass were all at 1.26± .03 in.
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Last edited by skinman; 01-03-2010 at 04:51 PM. Reason: hit the wrong number key. :-0
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  #19  
Old 01-03-2010, 02:00 PM
340six 340six is offline
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As far as FMJ and HP that has been addressed very well here already so did not want to put my $0.02 in
I think I will soon be loading some of the shortest 45rnds my self since I got a mint lyman 452389 Wad Cutter Button Headed
I asked a few places before getting one and most said it works very well in most guns
Comes in at 1.080 as the OAL in the books
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