Mags for AR-15 in .204 Ruger?

[Buck Wilde]

I have a .204 Ruger upper on the way. I've heard that some people have problems with .223 magazines. Should I be okay with Pmags?

 

[Near miss]

I have a .204 Ruger upper on the way. I've heard that some people have problems with .223 magazines. Should I be okay with Pmags?

Damn! Let us know how it shoots. I would try your current mags first. At least Pmags are easily modified to have a larger opening?

 

[kyzim311]

Pmags can cause problems, but the best bet is lancer mags.

 

[Buck Wilde]

I found out that C-Products makes Duramags for .204 Ruger, but only in 5- and 10-round sizes as far as I can tell. I'm thinking of picking up a 5-round for public land and two 10-rounds for target shooting. People say their big .223 mags work for .204 Ruger. I may get a couple. If they don't feed, they'll still be good for .223, and you can't have too many.

 

[fanninland]

I used PMags in a .204R I built a few years ago. IIRC I could get about 7-8 rds in a 20 rd Pnag before things got too tight. Isn’t the shoulder on the .204 case a little more forward than on a .223? This caused the .204 cases to start to bind at some point due to a small rib on the interior sides and towards the front of the pmag. Seems like I read somewhere folks would disassemble the pmag and shave the rib down on each side to allow easier loading. Regardless of how many I rounds I was able to stuff in I don’t remember there being a problem with the feeding.

 

[phxfa]

Colt 20rd mags have more internal room for the longer 204 shoulder
Pmags only work for 3/4 rds

 

[GH41]

What does the 204 Ruger offer that a 223 can't do in a gas gun??

 

[bfoosh006]

http://www.predatormastersforums.com/forums/ubbthreads.php?ubb=showflat&Number=2516635


I have no idea... but could a 350 Legend mag help with the .204 longer shoulder issue ?

 

[kyzim311]

What does the 204 Ruger offer that a 223 can't do in a gas gun??

Longer MPBR, higher velocity with the same bullet weight, higher bc varmit bullets. If all you plan an doing is shooting varmints with an ar, 204 is a good fit. It does not have the versatility of bullet selection and the barrel life will be shorter than 223, so it has its downsides.

 

[Wb7]

Pmags do bind up like already stated. 7 or 8 204 rounds is all you get. Lancers work great. Dura mag too. Pretty much every mag works for me but pmags.

 

[MarinePMI]

This is why originally the 204 Ruger was intended to copy the 20 Tactical; so it would feed in standard AR mags.

Long story short, Frontier fucked up, and we ended up with .222RemMag parent case instead of a .223.

If I were to build an AR in .20 caliber, it'd be a .20 Tactical or .20 Practical. Less headaches with magazines...which is ALWAYS the hardest part to design to function reliably.

 

[Choid]

USGI mags work great. Use 204 ruger to clear the pastures every spring.

 

[psdan000]

I use 20 round brownells mags in mine with no issues

 

[Softtail103]

I use 20 round metal magazines only. Pmag is the problem.