Lee offers a line of Micro Groove molds that do not require sizing. You cast the bullets, lube them with Lee Liquid Alox and shoot them. I have had excellent results with them in 41Mag and 40ACP at pistol velocities up to 1000fps. I also use regular Lee 45ACP bullets unsized, lubed with Lee Liquid Alox, In my 45 Auto. I use WW with about 1% tin for metal. This would allow you to start without a large expenditure.