Which Powder for 233 w/ 7.5" barrel

[Dustin0]

I looking for a load to work up in my SBR its a 7.5 AR. I looking for something that will help cut down on the carbon fauling. Please let me know what you have tried in your rilfe or AR pistol.

 

[kingmt]

Only 7.5" would have to be a fast powder but for a AR I have no idea what would operate the action.

 

[243winxb]

Imr 4198

 

[kingmt]

That is slower then I would have guessed. I was expecting something between universal & HS6.

Is it a fire breather with IMR 4198?

 

[rcmodel]

Regardless of the barrel length, the powder used in a gas operated firearm must be pretty close to a standard rifle load to operate the gas system without over gassing/too much pressure, or under gassing/not enough pressure.

Whatever powder gives the highest velocity in a long barrel will also give the highest velocity in a short barrel.

Just pick a powder you want out of any .223 rifle reloading data and it will be pretty much the right burn rate.

The IMR-4198 is about as fast a powder as you can use in a standard gas system, regardless of barrel length.

rc