The problem appears when the jaws close, the resulting space is more of an oval than the circle of the DuPont crimping tool: PR-3254 “DuPont” die compared to DuPont HT-208 (AWG 24) die.

The Wirefy crimping tool handles sizes from 22 AWG to 10 AWG. Well-cushioned ... dies for six different wire gauges: 8, 6, 4, 2, 1, and 1/0. This heavy-duty lug crimper from Iwiss is made from ...