Looking for clean burning powder?

[Jay]

Hi, I've been loading for the 300 and have used the following powers, 1680, lil gun, blue dot, 2400, H110, vith110. My AR has a 16" barrel and this what I have found out so far.

blue dot...to fast won't cycle bolt... burns clean
2400 ...to fast won't cycle bolt... burns clean
lil gun works...concerned about throat wear in rapid fire shooting..clean burning
H110...won't use ever again...blew up in gun (pressure spike, others on the forum have had same thing happen... no double or reduced charge..just boom!)
1680 works great with reduced loads + standard loads but really dirty.
vith110 won't cycle action yet... experimenting.

I am looking for a powder that works for subsonic +sonic loads that is CLEAN. There are several powders that I havn't tried and I am looking at imr 4227. Is this powder clean burning and does it work with all bullet weights in an AR.
Any powder suggestions would be appreciated. Thanks

[TCCrewchief76]

What is your gas port size and location?

[Hoser]

N-110 is the cleanest I have found.

[Spook]

Originally Posted by Hoser

N-110 is the cleanest I have found.

Listen to Hoser.

[Dacapster]

I must be to busy shooting to worry about "dirty " powder, Is it that big of deal? You stilll clean your guns every time you shoot yes?

[Hoser]

Originally Posted by Dacapster

I must be to busy shooting to worry about "dirty " powder, Is it that big of deal? You stilll clean your guns every time you shoot yes?

When shooting with a can, yes.

Without a can only when I feel like it or when the gun stops running.

[Trikstr]

also some of the others that I've posted and some of my other posts.
I have some supersonic loaded with Lil gun and N110 waiting to be shot next days off.
At this point I've mostly been trying to figure out subs.
As to your question about Lil gun being hard on throats here is what I found in my book propellant profiles.Accurate 5744 has shown the most consistent velocities and smallest standard deviations out of all the powders I have tried, but it has been kind of sooty with incomplete combustion(unburned granules). Fouling has been easier to remove from outside of barrel under suppressor than the fouling from IMR 4227.

All of the ball powders are touted as being easier on barrels than extruded powders. I have yet to prove it either way, but the broader my knowledge of propellants becomes, the more I question and seriously doubt that any extension of barrel life, if such does indeed exist, is a result of the so-called coolness of ball powders. The burning temps of stick(extruded) powders by DuPont and Norma of similar burning rate were 2500-3000 deg. Kelvin, while BL-C(2) was 2815 deg K. I believe that if ball powder are easier on throats it was probably due to them being less abrasive when being forced through the barrels throat that is heated to an almost molten state

.
Rapid(auto)fire?
There was nothing in the write up on Lil Gun, but I think it would be similar in qualities to BL-C(2).