I’ve been reloading for years, and finding good deals on bulk brass is always a hunt. For 300 PRC, I’ve had the best luck with MidwayUSA during their seasonal sales—they often drop prices by 15-20% if you buy 500+ pieces. Grafs & Sons also runs occasional bulk discounts, especially if you sign up for their newsletters. Check out Precision Reloading too; their bulk pricing isn’t always the cheapest, but their quality control is solid, and they throw in free shipping on big orders. Avoid no-name brands on Amazon; consistency matters with brass, and I’ve had split necks on cheap batches. Stick to trusted vendors, even if it costs a bit more upfront.