Congrats! Over 500 yards counts as long range in my book. Nice eating!!
I either put it on my thigh or under my strong elbow depending on the terrain and the pack and then squeeze the pack like I would a rear bag. I number one criteria for my pack are how it fits dimensionally for a front prone rest and as a rear stock support for sitting.That's some good shooting! I love the sitting positions at those ranges. I never put my pack on my leg. I'll give that a try.
Head over to New Mexico and shoot yourself a cow elk.I like to eat those big ol' bulls, but I love to eat a nice cow elk. 338-378 Weatherby hunter. It is new and so far only hogs, but f I live long enough—elk here I come.