IMR 4320 Smokeless Powder Med-Burn Speed Propellant Overview
IMR 4320 Smokeless Powder Med-Burn Speed Propellant;
This IMR 4320 is a medium-burn speed propellant with short granulation and easy metering characteristics.
It is perfect for the 223 Remington, 22-250 Remington, 250 Savage,
and also other medium burn rate cartridges. Finally, 4320 has long been a top choice for the vintage 300 Savage cartridges as well.
Furthermore, IMR recommends always consulting www.IMRReloading.com for the most accurate, up-to-date data.