Hey all, I am trying to learn as much about reloading as possible and also get started on this venture. I am a little confused on wither I should trim each case every time I reload. Buddy of mine said he trims the case everytime because after shooting it expands and gets longer. But he said he knows some guys that trim just once and trim a ways back. He said they trim enough that when the case expands it is still in acceptable range. MY question is that having different case lenghts every time effect accuracy? Also how do I figure what is the optimum case length for my rifle? I am trying to decide if i have to buy a case trimmer right now. Cash is low and it has taken me a lot of money to get started in reloading so I am trying to figure what else i need. Thanks all I really appreciate it and hope my question makes sense.