Cast Bullets for 300 BLK - Mold? Powder Coat? Gas Check?

[Hanzy4200]

Recently put together a 10.5" 300 BLK rig. So far I have only reloaded cheap jacketed bullets for it. My questions are many, but foremost, what is my best choice for a good projectile that will run good through a one piece suppressor. Powder coating is the way to go as far as I can gather. Am I on the right track? Mold suggestions? Is running a GC designed bullet without the gas check a big issue?

[mattw]

Hands down NOE 311-152-SP and 4227. I would link my thread but I am on a phone and would never get it right. Accurate Moulds also has the 31-150W, I asked Tom to create that one. The key is the reduced nose diameter on both.

Got the link copied...
http://castboolits.gunloads.com/showthread.php?374715-Finally-a-good-bullet-for-my-300-BO-AR!

[Hanzy4200]

I guess I should have clarified, but with the suppressor I will be going for subsonic loads. A 152 gr pill is a tad light in my opinion. I have never purchased a NOE mold and have always felt a little hesitant to drop $75 on a 2 cavity aluminum mold.

[Conditor22]

I like the 230 grn + boolit over either 700X or TB

I have NOE:
312 -232 COWW 311-232-FN 5 NOE
311-238 GC COWW 311-247-FN 4 NOE

and could send you samples to try is interested

Ran these through an H&R Handi with a can and don't need hearing protection

[NoZombies]

I guess I should have clarified, but with the suppressor I will be going for subsonic loads. A 152 gr pill is a tad light in my opinion. I have never purchased a NOE mold and have always felt a little hesitant to drop $75 on a 2 cavity aluminum mold.

I understand the hesitation, but NOE molds are head and shoulders above Lee molds in materials and workmanship.

[popper]

Problem with the med weight is getting it to run AR and stay sub. You can with fast pistol powder (not 110) but no cycling. I've go some 185gr I want to try with reloder7, 4198 or 4895 might work in my 10". The Lee BT sub doesn't work well.

[ofreen]

The hands down best powder choice in a 10 inch 300 BO AR for subsonic 200+ gr bullets is AA1680.

[scotner]

Running Accurate Mold #31-240A with H110. 1000 fps, powder coated. I can't help you with the financial decision but the mold is great.

http://www.accuratemolds.com/bullet_detail.php?bullet=31-240A-D.png

[quilbilly]

I recently acquired a Mihec 30 cal. 130 gr. two cavity brass mold that I understand was designed for the 300 BO. It is a semi spire point convertable from flat point to shallow HP, and deep HP. I do not have a 300 BO but my 30/30 loves it as does my T/C 32/20. That mold makes absolutely gorgeous boolits.