I am new to handgun cartridge reloading (have loaded thousands of shotshell rounds on my MEC 9000) and have a question. When a reloading manual specifies a specific brand of bullet, the Alliant Powder manual in front of me specifies a 158 gr. Speer LSWC in .38 spcl for instance, can I freely substitute any other "brand" of LSWC in the same weight keeping everything else constant (i.e. primer, powder, etc.)?