HELP!!!

[Dolomite_Supafly]

I recently found a box of loaded 300 Blackout subsonic ammunition. It was labeled for an AR. I was using it to test fire a newly built gun and these loads are insanely quiet, especially for a AR loading. Quieter than anything else I have ever shot.

Problem is I do not have any load data in or on the box so I have no clue what it is.

Here is a picture of the powder under a microscope.


I have compared it to every other powder I have on hand and none of them match.

I know it is NOT Lil'Gun, IMR 4227, H4198, Blue Dot, Trail Boss or VV N110. I did have some A1680 at some point but no longer have any to compare so it might be A1680.

So can anyone help identify this powder please. It is going to be my go to powder for subs if I can figure out what it is.

[plant.one]

thats not 1680... 1680 is roughly ball powder and doesnt have holes/disks in it

[dellet]

Maybe 5744, but that's not known for being ultra quiet.

Smokeless powder database

http://www.ilrc.ucf.edu/powders/search.php


http://www.ilrc.ucf.edu/powders/sample_ ... der_id=336

[wildfowler]

I am assuming it did shoot and successfully cycle in your AR rifle?

How much does the powder charge weigh? And what bullet was used?

I am certain I have a powder at home that has the hole in the center of the extrusion like that? I’m thinking a vihtavouri pistol powder or some other pistol/shotgun powder.

If this doesn’t get answered, I’ll go through my supply tonight and see if I can find what what I’m at least thinking of.

[Dolomite_Supafly]

I have never used or had A5744 and that is not a VihtaVouri powder.

I have every single powder I had before except A1680.

[Dolomite_Supafly]

I wonder if it is an oder version of Lil'Gun?

[Dolomite_Supafly]

I think it might be IMR 4227. Maybe they look slightly different lot to lot.

[Dolomite_Supafly]

I have shot A LOT of IMR 4227 but these loads are quieter than an other I have ever heard. Must be one of the other formulations.

Out of an 8" bolt gun and my silencer it is stupid quiet. It also cycles my AR.

[TRshootem]

I just looked at some IMR 4227 that I've had for a few years, it does indeed look like that, though even under my lighted magnifier it is quite small. It has proven to be darn quiet in some of my test loads.

[wildfowler]

What does the power charge weigh?

What does the bullet weigh?

Does it cycle an AR?

Edit : I see you said it does?