I have shot a lot of the PR bullets, and have had decent luck with some. I bought the prepackaged, and didn't have the best luck with accuracy as they weren't a good fit to my bore. You need to know what total bullet and sabot diameter your bore likes. Then you can call PR bullet and order bullets with the correct size sabot as they offer 3 different thickness sabots if i remember correctly. I was thinking about ordering some myself to try in my new rifles. In the past I had the best luck with the 300-340gr bullets.