Discussion board member and gunsmith Michael Ezell agrees that N320 is a good selection to the .forty five ACP. Mike has also observed that WW 231, though accurate, provides sparks and a sizable flash. Mike writes: “I first started applying N320 soon after my first evening shoot, while shooting IDPA/IPSC https://handloadingsupply.com/product/572-winchester-smokeless-powder-1-lb/