I second the RL17. I've tried H4350, RL15, 760/414, and Big Game. RL 17 gives the best pressure/velocity readings with the 300gr Swift A-frame. I've had around MOA accuracy with all of them but RL17 is the most consistent and I'm getting 2615 fps without any pressure. I've reached pressure signs at about 2550-2575 with the other powders mentioned. I actually had no pressure up to 2675 with RL17 but found a more accurate load down around 2600.
I'm headed to the range again today. I leave on Tuesday for my Zim Buff hunt. Wish me luck!
Lee
