Shoulder bump starting point and FL size question February 18, 2018, 11:17:44 AM I'm trying to find a starting point for managing shoulder bump by measuring the base to shoulder length using the Hornady headspace gauge. If I take 10 pieces of fired, cleaned and de-primed brass, I see about 0.001" of variation for the sample. When I mark the brass so I know who's who, I can re-visit each piece and reliably get the same measurement as last time, I think that means the tool and my technique produce repeatable results.Given this is Hornady brass reloaded 7x and annealed after the 6th time, is 0.001 a reasonable spread for fire-formed brass?My second question concerns my Lee FL die. When I compare, using the same Hornady gauge, some fire-formed specimens above with their FL sized counterparts where I followed Lee's recommendation for setting up the die in the press, on average I see about 0.006" of shoulder setback with the sized brass. Is it valid for me set the height of the Lee die in the press so as to reduce the amount of shoulder bump without upsetting some of it's other functions, like properly sizing the body?I'm not opposed to a different sizing die setup but for now, the Lee is all I've got.