Re: Powder Charge Increments for Load Development?
One grain is just fine here, as it's pretty close to one percent with a 300 RUM. Thing to remember here is that a grain isn't just a grain, it's a percentage of the overall charge weight. One grain in a RUM is right at one percent. One grain in a 22 Hornet is about ten percent. In the Hornet, one-tenth grain increments make perfect sense, but they'd be pointless in the RUM. You're fine here, and moving up in half grain increments is pure fine-tuning in something this large.