Three things-
First, this is the sort of thing you want to be thinking about before buying components, not after. No need to belabor that point though, I am sure you just figured that out
Second, you are fine using starting load data for different bullet shapes (assuming you are not talking about odd shapes, which you are not) provided that the bullet construction is the same (FMJ, Lead, Plated, etc) and that the weight is approximately the same (i.e. its OK to use starting data for a 124grain bullet with a 125grain bullet). This requires a little common sense with regard to bullet lengths, case depth, etc but basically, if you are talking about the same weight and material, you are safe with starting loads.
Third, the above is IN MY OPINION ONLY. I dont want you getting hurt, period, and especially so on my advice. So please confirm my statements with reliable sources and get you facts in order before seating bullets.
Good luck and happy shooting.