cmmg conversion kit recomendation

[Rdcpinoy]

Hi everyone I just purchased a cmmg 556 conversion to 22lr. I was wondering what ammo would best be recommended to not damage the barrel

[gasol1ne]

ive shot thousands of rounds through my conversion kit using Federal bulk pack ammo from wallmart. I also shot a few bulk pack boxes of remington and armscor, basically anything on sale. After all that my barrel still shoots as well as it did before the conversion.

I do however clean the barrel really well before shooting .223 through it again. And i boresnake it after every shooting session.

[Rdcpinoy]

OK thanks BC I just picked up cci 40 grain lead would that be ok

[wild_weasel]

I have the Stainless version myself. I was having a lot of misfires so took it apart and replaced the factory firing pin spring with a lighter one from my parts pin, since then it has been 100%. I have been using Blackdog 10 round magazines with stainless feed lips, they look like standard 20 round magazines and function great. As far as ammunition I've been using Remington Gold bulk, the latest stuff, in 525 boxes, I have been using has had no duds, unlike the stuff in the 550 boxes.

[wild_weasel]

An added note!

These kits will really foul the 223/5.56 chamber, invest $5 in a proper AR-15 chamber brush and scrub the chamber after every use of this conversion kit. My prefered bore cleaner is Kroil, it works great of carbon fouling in my AR-15 and lead in my 1911A1.

Cheers,
W-W

[starsnuffer]

Make sure you fire some 5.56 out of if every hundred rounds or so. The lead (even the copper washed version) .22 bullets foul up the gas port pretty quickly. Nothing that can't be blown out and vaporized by firing some normal ammo through.

-W

[TheExiled]

I try to stay away from anything that isn't copper plated to minimize fouling. I stck to cci premium stuff as the bulk packed stuff gave me a lot of misfeeds

[Enfield47]

If you run 10 rounds of .223 through after you are done firing the .22 ammo, it will blow the crud out.

I have used Federal bulk pack with the best results. I bought some Winchester bulk ammo but I have more feeding problems with it.

[starsnuffer]

I try to stay away from anything that isn't copper plated to minimize fouling. I stck to cci premium stuff as the bulk packed stuff gave me a lot of misfeeds

Good luck finding copper plated .22

There are some "copper washed" bullets, but it's just a thin coat of copper that comes off. I think the copper wash helps a bit, but I just don't want people searching for a unicorn that doesn't exist

-W

[Munny$hot]

Definitely avoid the armor piercing .62 gr steel core bullets it's real bad for your barrel.....

On the other hand since every brand of .22 LR out there is basically soft lead or copper washed lead there is no chance of damaging the barrel, so what ever functions the best, burns the cleanest, and cheapest will do.

[TheExiled]

Good luck finding copper plated .22

There are some "copper washed" bullets, but it's just a thin coat of copper that comes off. I think the copper wash helps a bit, but I just don't want people searching for a unicorn that doesn't exist

-W

This. My bad how could I have done such a thing

[Rdcpinoy]

Thanks everyone for the info

[akjunkie]

Excellent review here:

http://www.youtube.com/watch?v=rSNT-5OnT0w

[wild_weasel]

The 62gr M885 is no harder on an AR-15 barrel than the 55gr M193. If on the other hand you talking about the new M855A1 (green) ammunition then yes it is harder on the AR-15 platform due to being loaded to higher pressure to inprove the perfomance of the M4 Carbines.

Definitely avoid the armor piercing .62 gr steel core bullets it's real bad for your barrel.....

On the other hand since every brand of .22 LR out there is basically soft lead or copper washed lead there is no chance of damaging the barrel, so what ever functions the best, burns the cleanest, and cheapest will do.