If the bullet diameter is at least .3565 you should have some neck tension. But I doubt the Berry's have a crimp groove. Use a .38 taper crimp die or use the roll crimp that comes with the ordinary seating die and set it to crimp lightly and just enough to slightly crease the plated bullet. Too much roll crimp and you'll crack the plating and run into problems with the bullets getting their thin plating buggered up going down the barrel. Much leading and no accuracy. I've done it. So roll crimp gently and make sure your cases are all of the same length to get even crimps. .38 Special with light bullets hardly pulls bullets with recoil. You shouldn't have a problem. I lightly crimp plated bullets just as described with good results.
John
