I have used 3 different sets of RCBS dies over the years. All 3 sets came with 2 seating plungers, one for RN and the other for RNFP. If I cast bullets I use the old Lyman die. I think it is 401093, I cast only for BP. I have found over the years with that bullet I can shoot a 6 stage match without cleaning, rifle or pistol. If I shoot smokeless, I buy bullets with a crimping grove.