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Does anyone know where to purchase T570 powder?
[/ QUOTE ] "T" ? Kinda makes one wonder if the T is used for Thunderbird Cartridge Co. in Arizona. They have sold tons of pull down powder for decades and would use the "T" as a prefix for their powders. You can find ads in Shotgun News for the address I believe.
"A HUNTER SHOULD LIVE OFF HIS GUNS" JOHN TAYLOR