ST3XL
ST3XL is an extra-slow-burning single-base propellant engineered for the heaviest shotshell and specialty magnum loads. ST3XL’s progressive slow-burn rate delivers maximum velocity potential, making it the choice for pushing heavy payloads, such as 1-1/2 oz to 1-5/8 oz in 10-gauge and 12-gauge 3-1/2″ loads. ST3XL gives reloaders the confidence they need in demanding field and hunting loads. In terms of relative burn rates, ST3XL is in a similar range to Lil’ Gun and N110. Identifier: small (1.1 mm x 1.1 mm x 0.3 mm) gray granular flakes.