Is this powder inherently dirty?
Developing a load for my Garand. 30 rounds shot using this powder. 8 patches and they are still black as coal.
It is much dirtier than the powder used in the Greek HXP M2 Ball Ammo I have been shooting.
Maybe I need to choose another powder.
Guido

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RWVA, CMP, ISRA, GOA, SAF, NRA

IMR 4895 or AA2460 would be two I'd look at. Both burn a little faster. I'm guessing that means your 4064 is still burning while going out the barrel. Just a thought. kwg

Along with IMR 4895, IMR 4064 is one of my go-to powders for use with 150-165 grain bullets in the M1. I've used a lot of IMR 4064 and never considered it to be dirty.

Was the bore badly fouled before being shot with the 30 rounds? What sort of solvent is being used to clean the bore?

The barrel was squeeky clean. I normally use Hoopes to remove the initial fouling and follow up with wipeout to remove copper then a quick patch of remoil for rust prevention.
I can't remember getting sooty black patches ever.

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RWVA, CMP, ISRA, GOA, SAF, NRA

I don't really consider IMR 4064 a dirty powder. I shoot both IMR 4064 and IMR 4895 out of my 2 06's and both are outstanding powders for the garand. I do believe the 4895 is going to be better for you because it burns faster like kwg020 stated.

I'm new to reloading rifle cartridges.
Why would a faster burning powder work better in a Garand?

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RWVA, CMP, ISRA, GOA, SAF, NRA

A slower powder is still burning as it goes down the barrel behind the bullet. At the gas port on a Garand the pressure is still building with 4064. This puts extra pressure and speed on the op-rod and can bend the op-rod after repeated firing. With a faster powder the maximum pressure is developed closer to the chamber, before it gets to the op-rod gas port. The op-rod is pushed back with less speed and pressure.

There are gas locks that have metering devices in them to slow up the op-rod speed. I would not shoot a Garand without the metering devices. Op-rods are still out there but they are getting more expensive as time goes by. kwg

What I am loading for is Service Rifle and CMP Garand Matches where adjustable gas locks are not acceptable. The plan is to develope a lite 30.06 load with Nosler CC 155 BTHP. I used IMR 4064 with loads from 43gr to 47.5gr. (1/2 gr increments)

Let me see if I'm getting my head around this.
A faster powder like 4895 will burn completely in the cartrdge, where as 4064 is still burning as the bullet travels down the barrel.

I better do some more reading.

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RWVA, CMP, ISRA, GOA, SAF, NRA

Guido said:
A faster powder like 4895 will burn completely in the cartrdge

No, it burns up most of the powder closer to the chamber and the cartridge but not specifically in the cartridge. I can't tell you if and when the powder is completely burned up in a Garand barrel. But at 26 inches, you would think so.

I know your issue is with POWDER RESIDUE.... but what about this?? Work up a load with the new CFE223 copper fouling eraser powder from hodgdon... might never have to clean the barrel ever again!!! LOL

well, at least not have any copper fouling... they list one load on the data page at the hodgdon site.

I have loaded it in other rifles, and its good powder. Meters exactly like BLC-2, and It burns relatively clean

just a thought anyways... who doesn't like having NO copper fouling...

I have tried IMR4064 in my .220 Swift, .308, and 30-06. I didn't find it dirtier than any other powder that I have tried. It is more painful to meter being a stick powder. I am working on some match loads with it with 168 grain SMKs.