Also keep in mind if you are using a powder drop and not weighing each charge stay away from max loads. Even the most accurate powder drop can be off a tenth or 2 grains.
As for the crimp, some say no crimp into the bullet, just remove the belling. I however think a slight crimp is necessary. Should something happen where the bullet is somehow slick enough in the case mouth to set back, without a crimp you could end up with extreme pressures and destroy your gun and your hand. I use plated bullets as well and crimp til there is a slight ring visible after pulling the bullet. Never had the jacket separate as most people do, likely from a severe crimp.