[Guest]

These two were not handloads. These are factory Remington UMC 55gr cartridges. They must have not been properly crimped.

I'm not sure what is up with this one. Might be a feed problem. All of the other rounds (57) fired normally. I may have damaged it while I was trying to get one of the first two rounds out.
When I got home I cycled a few rounds in and out of the chamber and most are getting scratched on the feedramps. Doesn't seem like much damage but should I consider polishing the ramps?

 

[Guest]

I don't know what is causing the dents. But polishing the feed ramp couldn't hurt. I don't think scratches on the cases are that big of a deal. Maybe if you were to reload your own ammo. But I don't do that so I wouldn't care.

 

[Guest]

This is not the first time I have heard/read of this issue with Rem UMC
Some people have experienced KaB00M's with it, Rem is allegedly good about repair/replacement but I would rather avoid it. Check TOS - there are threads about this there.

 

[Guest]

I had a serious issue with Rem UMC.

Not in an AR, but an SKS. Continuous popped primers resulting in 2 round bursts, smoke flowing out of every crevice on it, and not to mention scaring me to death both times it did it. (out of the same box).

Luckily no squibs.

Remington did pay for the gunsmith services to have my gun checked, but was enough to wean me when the smith found nothing wrong with the gun. He said he checked the hammer tension somehow with 2 other sks's he had for sale and it was consistent with his other two.

Determination, the ammo was the culprit.

I refuse to use UMC (Ultra Made Cheap) ammo in any of my guns now. No matter how economical (cheap) they are.

This was about 4 years ago, so apparently, Remington QC hasn't improved. At least in that line of ammo.

 

[Guest]

Well, I have a bunch of it. When it's gone I guess I'll buy something else. I must have shot 600-700 rounds of it before this with my last AR with no problems...

 

[Guest]

i think your crappy camera caused the dent/dimple haha

interesting pics...my dad has 200 rounds of the same ammo downstairs waiting for his next range trip.

ill inform him..

 

[Guest]

I have another defensive carbine class on Mar 01-02, and I feel soooooo much better using my own loaded ammo. Factory specs scare me more and more every day!

 

[Guest]

I always thought UMC was tops. Only thing I did not like about it is it is .223 when I prefer 5.56 NATO. Though UMC is not that accurate, I always liked it because I could get it for $6.49 a box at my local walmart anytime, and the brass is always super shiny.

I myself always considered it reliable ammo.

 

[Guest]

I myself always considered it reliable ammo.

Me too. And I have found it to be fairly accurate up to 50 yards or so.

 

[Guest]

I have another defensive carbine class on Mar 01-02, and I feel soooooo much better using my own loaded ammo. Factory specs scare me more and more every day!

I had always thought that most classes require factory ammo.

I may have to look into some local classes to find out.

I always thought UMC was tops. Only thing I did not like about it is it is .223 when I prefer 5.56 NATO. Though UMC is not that accurate...

I was reading on BoxoTruth that military ammo is not as accurate as most people think. I guess for minute of man it isn't a big deal.

http://www.theboxotruth.com/docs/edu8.htm

Also I guess now I have an excuse for my crappy 3 gun scores or large groups when using Wolf. :lol:

http://www.theboxotruth.com/docs/edu21.htm

 

[Guest]

Well, I have a bunch of it. When it's gone I guess I'll buy something else. I must have shot 600-700 rounds of it before this with my last AR with no problems...

This must be an issue with your new weapon. You must immediately ship it to me for further function testing. After 2-3000 rounds (at my expense, because I'm friendly that way) I will return it to you :wink: with a full function and reliability report (provided on high grade post-it notes) and will even promise to clean the weapon as well.

Seriously, never used the UMC ammo in a rifle, it was fair to midland in the performance in pistols. It wasn't anything that I was super stoked about nor disappointed in.

There is a reloader that comes to the flea market, er Gun show out here, Ten-X.. they do pretty large quantities and for training ammo it's been dead reliable in every AR and .45 I have.. they have a web site that looks like a cowboy action site. You can call and see what their shipping costs are. I generally get 1-2K from them for less than $250 per 1k. Just another option.

 

[Guest]

I have used quite a bit of Rem UMC .223 ammo with no problems. I check all my ammo pretty well when loading magazines. I'll be keeping an eye out for those problems.

My feed ramps scratch the cases pretty well, too, but even after reloading the cases, I have had no problems yet. Some day, I'll smooth out the rough edges.

For the poster with the double fire in an SKS, I'd posit that was caused by the free floating firing pin and enough bolt velocity to fire the second round off, your firing pin protrudes a little too far, or you just had a few soft primers and have nothing to worry about if you stay away from Rem UMC.

 

[Guest]

Well, I have a bunch of it. When it's gone I guess I'll buy something else. I must have shot 600-700 rounds of it before this with my last AR with no problems...

I'm with PackerfanXD. The UMC is all I have been shooting lately. Zero issues. I'm running them thru a White Oak Service Upper, Bushy Lower.

I will double check the rounds though. Thanks.

JimmieD

 

[Guest]

I decided to sell off my remaining .223 UMC (24 boxes) after another ftf due to yet another collapsed cartridge.

So I just ordered 1400rds of Prvi Partizan.

 

[Guest]

I decided to sell off my remaining .223 UMC (24 boxes) after another ftf due to yet another collapsed cartridge.

So I just ordered 1400rds of Prvi Partizan.

I'm told from a source I trust, Prvi Partizan is good to go.

 

[Guest]

I decided to sell off my remaining .223 UMC (24 boxes) after another ftf due to yet another collapsed cartridge.

So I just ordered 1400rds of Prvi Partizan.

Check the seam between the barrel extension and the feedramps if there is any ledge there at all it will do exactly what you are describing. The tip of the bullet hangs up and the bolt smashes it against a bolt lug. When this is happening it will feel like the gun is cycling a bit slow.

 

[Guest]

Check the seam between the barrel extension and the feedramps if there is any ledge there at all it will do exactly what you are describing. The tip of the bullet hangs up and the bolt smashes it against a bolt lug. When this is happening it will feel like the gun is cycling a bit slow.

Yeah, I might need to smooth it out a bit. I'll check it out more closely tomorrow.

 

[Guest]

I was reading on BoxoTruth that military ammo is not as accurate as most people think. I guess for minute of man it isn't a big deal.

The Box O' Truth - Educational Zone #8 - 5.56 Military Ammo Accuracy

It seemed pretty accurate at the 500 yard line with open sights and varying cross winds.

That article, while pretty good as far as testing goes, fails at the onset. There are no 16" SS bull barrels in the military. Maybe if he had a real M16a2 or a4 with a 20" 1:7" twist Gov't profile barrel I'd grant more merit to his arguement. The barrel used to test the different ammo is too short, which is bad, even if it was a 1:7 twist. All of which would lead to the rounds not being stablized enough. Bad science there.

I think its a good idea, in priciple, but it's like testing the best high performance diesel fuel in a Corvette.

 

[Guest]

Did you figure out the problem?

 

[Guest]

Did you figure out the problem?

I'm fairly sure it's the ammo. The feed ramps are not a problem.
I am getting light primer strikes on rounds when I cycle them through, however. I think I may take a bit off the end of the firing pin...