Another SBR Barrel Thread

[mustang5o]

Planning a 10.5" AR build (5.56/223).  Should I be concerned with twist rate?  I know you generally go by the ammo of which I mostly shoot 55gr FMJ.  What's a good self defense ammo in 5.56 or .223?

[FarmerRick]

If you ever plan on shooting heavy bullets(69+ grains) then get the 1/7. Otherwise, a 1/9 twist barrel should be just fine.

[gsd]

As far as SD ammo, I can't offer much as I have not done much research into the topic, but I have heard good things about Hornady Tap FPD.

[bkoenig]

I just built an 11.5 and went with a 1:7 twist.  It handles the 55 grain just fine, but can also shoot heavier stuff.  I don't really see a reason to go with 1:9 when 1:7 or 1:8 will do everything that 1:9 will and more.

[mustang5o]

Thanks for the information.  Seems most of what I'm finding is 1:9 but I'll keep looking until I ready to...ahem, pull the trigger.

As far as SD ammo, I can't offer much as I have not done much research into the topic, but I have heard good things about Hornady Tap FPD.

I was thinking the same thing but it looks like they aren't making any right now.

http://www.hornady.com/store/223-Rem-55-gr-FPD/

[FarmerRick]

Thanks for the information.  Seems most of what I'm finding is 1:9 but I'll keep looking until I ready to...ahem, pull the trigger.

I was thinking the same thing but it looks like they aren't making any right now.

http://www.hornady.com/store/223-Rem-55-gr-FPD/

.223 and 5.56x45 in stock here:
http://www.sgammo.com/product/hornady/20-rd-box-223-hornady-tap-55-grain-urban-ammo-83276
http://www.sgammo.com/product/hornady/200-rd-case-223-hornady-tap-55-grain-urban-ammo-83276

http://www.sgammo.com/product/hornady/20-round-box-556mm-hornady-tap-le-55-grain-gmx-barrier-ammo-81255
http://www.sgammo.com/product/hornady/200-round-case-556mm-hornady-tap-le-55-grain-gmx-barrier-ammo-81255

[bkoenig]

Here's a great deal on a complete 1:7 12" upper.

http://palmettostatearmory.com/index.php/psa-chf-12-5-56mm-1-7-a2-profile-upper.html