300 whisper, 300-221, Blackout load data

dogtired

dogtired

New member
I have gone rogue and am collecting the stuff for a 300 Blackout. Those of you that have some load data for the 300 Whatever in both super and subsonic please pipe in. Our local store has a limited selection of powders so I will either have to order from else where or use what is on the shelf. I have the brass, 225 grain Horndady match bullets (as well as many other 30 cal bullets). Build will be a AR15 SBR with a 10 inch barrel, pistol position gas port, suppressor of course.
 
I use 8.2 of AA9, for best accuracy I use 8.6 of N110 both of these loads are with SMK 220s and 7.5 rem primers load 2.1-2.2 oal. I am shooting a 10.5" ar with a Thunderbeast 30P-1 suppressor.
I hope this helps. You can go over to the quarterbore forums and get a lot of help over there.
 
Thanks, I am a member. I just can't get 1680 locally and tried some other stuff and can't get the subs to cycle properly.
 
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N110 is harder to find than 1680, but thanks for the offer. I am going to try the Rem Sub Factory load to see if the problem is elsewhere...
 
I'm working on some now with N110. My gun is a SBR 10.5" and 8.6 is working with the 220 SMKs. I'm getting about 1020fps and well under moa.
 
I'm currently in the middle of a load development with:

LC Brass

N110

220 gr SMK

CCI SR primers

16" Bolt gun
 
Originally Posted By: E5BI'm currently in the middle of a load development with:

LC Brass

N110

220 gr SMK

CCI SR primers

16" Bolt gun

Let me know what you come up with. I'm about to build me 16" bolt gun.
 
Retooferab, no problem. I will report back once load development is complete. So far, I've been to the range with it three different times and I can tell you it is an absolute awesome time shooting it.

Here is the thread I started on my bolt build: My 300 Blackout build
 


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