I am new to reloading and recently tested my first batches of .40S&W, .44MAG & .223. In order to develop my loads for the jacketed bullets I chronod some factory rounds with similar characteristics. As an example: Federal 155 grain HST JHP compared to my reloaded Hornady 155 Grain XTP JHP I determined that the factory Federal round had a velocity of approximately 1150FPS at 10 feet. Once I had that as a benchmark I chronod increasing powder charges while checking cases for signs of pressure. I was able to use this for my jacketed bullets, but I do want to save money and shoot cast bullets for plinking I have read that too little of a charge will prevent the base of the bullet from expanding and providing a good seal in the barrel and too much will cause the gases to melt the lead and cause leading Obviously, for the cast rounds I am not going the try to match jacketed performance. However, How do you find the best charge weight for a cast bullet? I am primarily interested in .40S&W and eventually .45ACP I am using W231 and Unique (Probably will settle on W231) Wanna kill these ads? We can help!