300 Blackout ???

[Thumb]

I finally broke down and ordered a 300 Blackout barrel for one of my AR's and wondered what would be the most accurate bullet weight for say 100 yards? I know there's all kinds of if's and that's but just wanted an average of what I should start using when I reload them. I was just thinking about starting in the middle of what's available and go from there. I have 8lbs of H110 to start with so any tips would be appreciated.

 

[HPMike800]

I shoot whatever cheep 145-155gr bullets I can find. H110 is excellent for the blackout- 16.2gr gets me 1950fps.

 

[snert]

I just loaded the new Sierra 135 varmint bullet in 308 at BK speed, and it gave me one large hole 6 shot group at 100 yards.

 

[Sniper338]

I have an itch to build one...

 

[Chris Few]

I really like H110 with Nosler 110gr Varmageddons. I can usually find them at shootersproshop.com in either over runs or blems for around $19/100. If you plan on making any subs you can also get the Nosler Custom competitions there in 220gr for about $27/100. I usually use A1680 for my subs. I tried to use some IMR4227 and didn't have good luck with it for subs but seemed to work fine for supers.

 

[Thumb]

Thanks guys, that gives me a heads-up on what to start with.

 

[snowpro440]

I think there's a forum Silencer Talk that covers the 300 blackout. I just haven't been there in awhile.

 

[1shot]

+1 to what snert said. I use 135 SBK on top of AA 1680 with very good success.

Lloyd

 

[X-Caveman]

speer 115 TNTs.

 

[Thumb]

Got some Hornady 150gr FMJ B/T and will try those out with the H110. Of course I still ave to wait for my barrel and upper to come in before I can test them.

 

[Markk9]

If your looking for a subsonic bullet, I use a coated cast 240gr bullet from Missouri Bullet Company. The bullets at up 1200 fps are not leaving anything in barrel.

 

[rifleman700]

Sierra 125 TMK

 

[Thumb]

OK, i got my Lee dies in so I made up a test reference round using Hornadys 150gr FMJ B/T and set the bullet according to their load data with an OAL of 2.220" which only leaves .110" into the case not including the B/T. Does that look right? The case length is 1.355" FYI which I did not trim at all.

 

[Chris Few]

If i recall right mine looked the same.

 

[rifleman700]

Yep

 

[rebel]

This post looks familiar
http://www.300blktalk.com/forum/index.php
It's a small world Thumb.

 

[Thumb]

This post looks familiar
http://www.300blktalk.com/forum/index.php
It's a small world Thumb.

Never hurts to ask in different places I've learned.

 

[rebel]

True that bro!