Very good deal on Yugo 7.62x39...about 17 cents a round. http://www.aimsurplus.com/product.aspx?item=A76239Y&groupid=39
Corrosive, though. Shouldn't matter for AK or SKS as they are so easy to clean. Anyone shot corrosive ammo through an AR15? (I have one in 7.62x39) I know there are AR's out there in 5.45x39 to take advantage of the cheap corrosive ammo. Would you have to take the gas block off to wash off corrosive salts after each cleaning?
I found an answer to my own question...
I emailed AR Performance, who made my upper. Their barrels are coated inside and out with Melonite, which protects against corrosion. He said that he has a 5.45x39 upper that he shoots corrosive surplus through without any problems.
I did some research at AR15.com, and one shooter just shoots 20 rounds of non-corrosive after shooting corrosive, the idea being that the non corrosive gases will blast out remaining corrosive residues.
I am thinking squirting black powder solvent or ammonia solution down the gas tube with a syringe should ensure any salts in the gas system get eliminated. And, of course, cleaning the bore, flash hider, and bolt group with same solution.
Just run some windex or ammonia over the gun. Dont forget, that the SKS and AK both vent gas out of the gas tube and this tends to spew the corrosive salts on the exterior of the rifle so you should give that a wipe down as well.
Id be hesitent to shoot corrosive out of an AR system that wasnt piston. The DI system dumps gases out the bolt, meaning youll get alot more corrosive salts in the inner workings of your AR and you'd want to strip it down an give it a good wipe down with some windex/ammonia.
Bring a bottle with you to the range and give it a quick hose down before you load it back in your gun bag, THEN give it a better cleaning when you get back home/camp.
The idea of shooting non corrosive out of it after the corrosive isnt a bad idea. I dont think its been proven either way scientificaly, but quite a few people do it and I cant imagine its going to hurt anything.
I use a black powder cleaner/solvent called "Black Off" on my S&W M&P15 in 5.45X39. The corrosion factor (I believe) is very dependent on humidity. I've gone up to a month without cleaning my rifle in the past with no sign of corrosion when I did tear it down to clean it. Then, one time, I shot it on a rainy/foggy day and by the next day it had "orange fungas" growing in the bolt carrier, locking lugs/barrel area and the flash suppressor. That time I cleaned it up with hot water in the kitchen sink and dried it off with a hair dryer. No sign of rust since.
Quote from: Old Dog on August 25, 2010, 07:03:11 AM
I use a black powder cleaner/solvent called "Black Off" on my S&W M&P15 in 5.45X39. The corrosion factor (I believe) is very dependent on humidity. I've gone up to a month without cleaning my rifle in the past with no sign of corrosion when I did tear it down to clean it. Then, one time, I shot it on a rainy/foggy day and by the next day it had "orange fungas" growing in the bolt carrier, locking lugs/barrel area and the flash suppressor. That time I cleaned it up with hot water in the kitchen sink and dried it off with a hair dryer. No sign of rust since.
Yeah, down here in FL(and south in general) I highly recomend an at-range basic hose down before getting home to give it a thourough cleaning. Ive heard of guys getting the orange fuzz between the range and home before, it can be that fast. It isnt always, but it can be.