7.62x39 or 300black out ?

[smak28]

Uhh theres more to life than FPS... like cost. I also would feel good knowing that I nor anyone I took shooting could ever mix up 5.56 and 300BLK mags and blow a gun up.

^This. The reason I first considered .300blk was because of the ballistics (vs. 5.56) + less components to purchase as I have tons of 5.56 mags and the redundancy of parts. However looking at it for the long run, what really convinced me to go with 7.62x39 over .300blk was the cost. I've never bought steel cased ammo in my 24yrs of firearms, but after looking at the prices between steel cased 7.62x39 (~$250 for 1k rounds) vs. .300blk brass (~$650 for 1k rounds), that's a HUGE price difference for similar ballistics. That's $400 difference each time buying a case of 1k rounds of 7.62x39! I don't reload, so 7.62x39 is best option for me. If you reload, then it may make sense to go with .300blk if that's your preference although the ballistics are very similar. However as I was told by the more knowledgeable folks, advantages of .300blk is really with suppressors, which is not allowed in Commifornia but the ballistics are pretty much the same.

[CouchOperator]

Im just here to enjoy OP's signature gif

[darkwater]

Im just here to enjoy OP's signature gif

Lol...where did that even come from? Looks like a variety or comedy show of some kind...

[Junkie]

Uhh theres more to life than FPS... like cost. I also would feel good knowing that I nor anyone I took shooting could ever mix up 5.56 and 300BLK mags and blow a gun up.

I believe he was only referring to ballistics

[mif_slim]

Im sooooo tired of reading these folks who keeps saying suppressor i needed for 300blk. I guess it goes the same with x39 to be inaccurate also.

OP, really up to you. Just so you know, for me, i no longer own and 5.56. Its all swapped to 300blk, and i didnt do it for the fad, i did it because it fits my purposes.

[goodlookin1]

300 blk if going AR platform. But if you want 7.62, then go with an AK platform.

I can tell you that after building my 300 blk and making and shooting some subsonics, it is amazingly fun. Even without a suppressor or short barrel, those loads are very quiet! And they requires no special internals in order to cycle the gun! If I had a suppressor, man those shots would have sounded like mouse clicks!

AK's are fun too. I dont like 7.62 in AR's though....the rifle was obviously not made to shoot a case with such a strong taper. Evidence is in how much of a bend the mag needs and how straight/long the magwell is.

[etwinam]

300 blk if going AR platform. But if you want 7.62, then go with an AK platform.

I can tell you that after building my 300 blk and making and shooting some subsonics, it is amazingly fun. Even without a suppressor or short barrel, those loads are very quiet! And they requires no special internals in order to cycle the gun! If I had a suppressor, man those shots would have sounded like mouse clicks!

AK's are fun too. I dont like 7.62 in AR's though....the rifle was obviously not made to shoot a case with such a strong taper. Evidence is in how much of a bend the mag needs and how straight/long the magwell is.

Ya I'm kind of excited to try the subsonic rounds. I've already made my decision to go that route. I just need to save up for a barrel now. I already one picked out. It's just a matter of funds now.

[SnipeShot]

I'm building both just to keep my idle hands busy. I found a deal on a full 7.62x39 AR upper on Midway which sold me.

[dwalker]

I load my 300blk up with a 125GR Speer HP over H110 at about 2200fps and its a super accurate round. No idea why folks think this is a sub only round.

[dwalker]

Uhh theres more to life than FPS... like cost. I also would feel good knowing that I nor anyone I took shooting could ever mix up 5.56 and 300BLK mags and blow a gun up.

I am not sure that could ever happen. 5.56 will not chamber in a 300blk gun and 300 will very definitely NOT chamber in a 5.56 gun.
Now I have a 6mmx45 and 5.56 will chamber and fire- with the accuracy you expect from a 224 dia bullet in a .243dia tube, but 6mm will not chamber, at all, in a 5.56.

[mif_slim]

^it can actually. Ive tried it before. But its a weak excuse. Kind of like bringing a 9mm and shooting next to a 40sw or 357 and a 40sw or any of similar ammo. Proper shooting and instruction is whats important, not the cartridge. Kind of like saying guns kill people, not people kill people.

[etwinam]

I'm building both just to keep my idle hands busy. I found a deal on a full 7.62x39 AR upper on Midway which sold me.

I found one on primary arms for $199 complete x39 upper including flash hider. I'm really into the subsonic round with more fps and easier transition. ill see how I like the black out then I may even sell the extra 5.56 barrel if I can.

Or I can always sell the black out barrel if I hate it.


Here is the link if you're interested. Only bcg needed.

http://www.primaryarms.com/radical-firearms-762x39-16-110-upper-receiver-12-fgs-handguard/p/rfu16-1-10-7.62-12fgs/

[smak28]

Im sooooo tired of reading these folks who keeps saying suppressor i needed for 300blk. I guess it goes the same with x39 to be inaccurate also.

OP, really up to you. Just so you know, for me, i no longer own and 5.56. Its all swapped to 300blk, and i didnt do it for the fad, i did it because it fits my purposes.

I load my 300blk up with a 125GR Speer HP over H110 at about 2200fps and its a super accurate round. No idea why folks think this is a sub only round.

I don't think anyone is saying .300blk is a sub-only round, but it's one of the HUGE benefits of the .300blk that cannot be enjoyed by having a suppressor in California, which was one of the main objectives of the cartridge. However, an AR pistol can reap the benefits of it. Even though I decided to build a 7.62x39, it doesn't mean that I won't eventually get a .300blk and I'm sure I will. I still like the fact that I can easily swap with my existing 5.56 AR which is another benefit. The ballistics between the two are very similar, so flip a coin and you can't go wrong with either caliber in Cali. Cost of ammo, if they don't reload, can be a big factor for consideration.

[Junkie]

300 blk if going AR platform. But if you want 7.62, then go with an AK platform.

I can tell you that after building my 300 blk and making and shooting some subsonics, it is amazingly fun. Even without a suppressor or short barrel, those loads are very quiet! And they requires no special internals in order to cycle the gun! If I had a suppressor, man those shots would have sounded like mouse clicks!

AK's are fun too. I dont like 7.62 in AR's though....the rifle was obviously not made to shoot a case with such a strong taper. Evidence is in how much of a bend the mag needs and how straight/long the magwell is.

The mag issue is why I'm working on buying a KS47

You should try a PCC sometime too, they're even quieter.

[Junkie]

I am not sure that could ever happen. 5.56 will not chamber in a 300blk gun and 300 will very definitely NOT chamber in a 5.56 gun.
Now I have a 6mmx45 and 5.56 will chamber and fire- with the accuracy you expect from a 224 dia bullet in a .243dia tube, but 6mm will not chamber, at all, in a 5.56.

The 300BLK case is enough shorter than 5.56 that with some bullets it'll fit in far enough for the bolt to lock up. There are plenty of internet posts about people blowing up their guns that way, and I doubt they're just making them to brag about being that dumb.

http://www.ar15.com/forums/t_3_121/575869_Can_you_shoot_300_BLK_out_of_a_223____Update__It_s_Out___Page_2.html