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Thread: Squib Load Root Causes
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December 23rd, 2023, 12:39 PM #1Member
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Squib Load Root Causes
Other than the obvious light load, what are some other reasons for squibs? I’m loading 38 Special 158 gr. plated Berrys RN using Win 231 to the 3.8 grains for 750 fps as listed for 158 gr. LRN in the Hornady manual.
The only thing I can think of is that I was seating the bullet to the max COL (1.550”) instead of 1.455”, which I later saw was the recommended COL depth for the 158 gr. LRN. So maybe the pressure was off due to the higher seating?
Any input would be greatly appreciated. Thank you in advance.Philippians 4:13
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December 23rd, 2023, 12:50 PM #2
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December 23rd, 2023, 01:30 PM #3Grand Member
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December 23rd, 2023, 01:31 PM #4Active Member
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Re: Squib Load Root Causes
Other than what's stated above about a low powder charge could be a defective/weak primer. A firing pin strike can be hard enough to dislodge the bullet if the primer is bad. One other thing I just remembered is on my AR platform 50 Beowulf I used a really light crimp and when the bolt cycled after the first shot the bullet did leave the case mouth but not technically a squib.
Last edited by guncollector; December 23rd, 2023 at 02:19 PM.
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December 23rd, 2023, 01:39 PM #5
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December 23rd, 2023, 04:24 PM #6
Re: Squib Load Root Causes
No powder. I had one in my 50bmg. Kept trying to run one home and the bolt just wouldn't close.
Thank god it didn't.FJB
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December 23rd, 2023, 08:17 PM #7
Re: Squib Load Root Causes
The only squib ive had was with russian ammo, the powder didnt light for whatever reason. Opening the bolt the powder dumped all through the action
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December 24th, 2023, 01:47 AM #8
Re: Squib Load Root Causes
No/too little powder, bad powder(partially or no burn at all), a combination of weak primer and too little or bad powder, and bullet too big for bore - that is basically all the causes of squibs.
About the bullets too big for bore - sealed barrel/chambers would likely blow the barrel or casing. Revolvers on the other hand, the bullet can lodge in the barrel and gases escape between the cylinder/barrel gap.RIP: SFN, 1861, twoeggsup, Lambo, jamesjo, JayBell, 32 Magnum, Pro2A, mrwildroot, dregan, Frenchy, Fragger, ungawa, Mtn Jack, Grapeshot, R.W.J., PennsyPlinker, Statkowski, Deanimator, roland, aubie515
Don't end up in my signature!
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December 30th, 2023, 05:59 PM #9Grand Member
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