I tried some RL 17 in my APA 7 BAT (7/300 WSM) this past weekend. I could only find data for 160 gr bullets on the Alliant's website so I went with 60gr as a starting point for the JLK 180gr VLD's I was going to be using. At 62gr the bolt was hard to open so I decided 61.5 would be max for my...