I'm working up a recipe for a good hunting round, but the data for the bullet I have is a little hard to find. I'm using IMR 4320 and a 65gr Sierra GameKing bullet. This is the most useful source I have found for this data yet. http://www.imrpowder.com/data/rifle/223rem-2005mar28.php It doesn't list a 65gr GameKing, but it lists something called a 63gr SIE SP. I assume this means it's a Sierra Soft Point. Correct? Here's what's listed. Would the data for this bullet be ok to use with the 65gr GameKing bullets?