Autocomp: really slow 231?

I am loading a 124 grain powder coated hollow point lead bullet in 357 Magnum. I have decided to use the starting charge of 6.5 grains, my intention is accuracy from a rifle.

It meters excellently and does not bind the powder measure. I'm going to go to the shooting range after I drink a bunch of coffee. It's either equipment malfunction or operator error if it doesn't work[emoji1787]

If this experiment proves out well I am going to start a ladder of different powder charges and bullets.

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I like Autocomp for .41 Magnum ,it is accurate and good velocity with cast bullets.

I use AutoComp in .32 ACP, 9mm, .38 Special +P and .357. Burning rate very similar to power Pistol.