Ammo ruined by oil

Hello123 · July 19, 2005, 10:02 PM

Has anyone ever heard of ammo being ruined while in the chamber of the gun (such as in a home defense pistol) because the gun is too oily? I am refering to the oil making its way into the brass as ruining the powder.

N.M. Edmands · July 20, 2005, 12:16 AM

Yes! Usually creeps in and ruins the primer

BillCA · July 20, 2005, 01:56 AM

Yup.

Happens when you combine ammo with no primer sealant with a gun that's been over-oiled and/or improperly cleaned. Oil vaporizes and sneaks in around the primer, rendering it inert over time.

For guns you keep loaded, clean & oil them, then run a dry patch through the chamber(s) and bore to remove excess oil. Dry fire the gun (except rimfires) 5-6 times to see if the action oozes more oil. If so, blow out excess with compressed air & wipe gun down.

mete · July 20, 2005, 12:41 PM

The NRA did a study of many gun oils and cleaners. The problem is really those that have penetrants in their formulas.It is the penetrant that penetrates around the primer and brings oil with it.Often LEOs and others would spray lube directly onto the loaded cylinder and that would be the worst problem.

July 19, 2005, 10:02 PM	#1
Hello123 Senior Member Join Date: February 21, 2005 Posts: 571	Ammo ruined by oil Has anyone ever heard of ammo being ruined while in the chamber of the gun (such as in a home defense pistol) because the gun is too oily? I am refering to the oil making its way into the brass as ruining the powder.

July 20, 2005, 12:16 AM	#2
N.M. Edmands Member Join Date: December 2, 2001 Location: Yarnell,Arizona Posts: 48	Yes! Usually creeps in and ruins the primer __________________ Nat "Some where something incredible is waiting to be known" -Carl Sagan "It aint how good you shoot,it's how cool you look doing it." -Fred Sayre 1994

July 20, 2005, 01:56 AM	#3
BillCA Senior Member Join Date: November 28, 2004 Location: Silicon Valley, Ca Posts: 7,117	Yup. Happens when you combine ammo with no primer sealant with a gun that's been over-oiled and/or improperly cleaned. Oil vaporizes and sneaks in around the primer, rendering it inert over time. For guns you keep loaded, clean & oil them, then run a dry patch through the chamber(s) and bore to remove excess oil. Dry fire the gun (except rimfires) 5-6 times to see if the action oozes more oil. If so, blow out excess with compressed air & wipe gun down. __________________ BillCA in CA (Unfortunately)

July 20, 2005, 12:41 PM	#4
mete Senior Member Join Date: June 14, 2004 Location: NY State Posts: 6,575	The NRA did a study of many gun oils and cleaners. The problem is really those that have penetrants in their formulas.It is the penetrant that penetrates around the primer and brings oil with it.Often LEOs and others would spray lube directly onto the loaded cylinder and that would be the worst problem.