A guy on another forum asked this question and I responded by telling him to chrono the round and try to match the bullet. Another person said to dump the powder and use a powder that looked the same. I responded that that was a potentially dangerous thing to do and got this brilliant response. looking at the powder is a great idea, if you have ever relaoded which I take it you haven't or have much experince with as you can tell the type of powder it is, you may not have the actual brand but the style you will be able to see! Then you can match that with a powder that you can use with that round! Example H4350 will be very simular to IMR4350 and if one of those is listed both of them can be used! NOT TOGETHER THOUGH! If it's a stick type poder that is in the factory round then get a stick powder that will work for that round, if it's a small fine powder in the factory round then get that type of powder!!!