On my new rifle, either a 30-06 or 280, I am going to get someone to develop a load for it (i.e. they take my rifle and develop the load specifically for my individual rifle). My question is this - if I get the recipe and start reloading (I have never done it before), I would obviously need to buy the same components, powder, etc he used. But having heard that powder, bullets, etc change some from lot to lot. Would the recipe need tweaking if I were to get into reloading and follow the recipe? I would be looking to take game out to 400-500 and anything beyond that would be target practice. Thx.