I have loaded some Gold Dots for my Colt, which I had for the 45 ACP. They had no groove so I simply ran them up in the ACP seating die and let the taper crimp do it's job ironing out the lip of the cases. It worked out great, just had to add a spare ring to the die to adjust for the difference in height. These were loaded on a single stage press as well.
Mike / TX