.357 Sig? Cartridge Introduction and FMJ Ballistic Gel Test (VS .40 S&W and 9mm)

Testing out my new KKM .357 Sig barrel for my 5" S&W M&P 40. I talk about the cartridge and do a 10% Clear Ballistics gel test VS .40 S&W and 9mm. Always appreciative of any channel help :) www.patreon.co...