Mas-Happy Sunday to you! I found this information about Underwood ammo on caliber corner. Underwood uses Gold Dot ammo traveling at 1450fps in .357sig caliber! Have you ever heard of this company & if ya did what's your opinion of this ammo? Here's their link: http://www.underwoodammo.com/357sig125graingolddotjacketedhollowpointboxof50.aspx#reviews Time to heat up another pot of coffee! Thank-you for your insight! Semper Fi to my wife till the day I die!