I agree, that high of a BC at that velocity would be a good one for backpacking high country mulies. I have no experience with the short mags and have no idea what velocities I can get with them. I was looking at that 142 match king in 264 and hoping to get 3200 out of it in the short mag but have no idea if that is possible. I have volumous personal loading and shooting data on most popular wildcats based off the 220 swift, 250 savage, 30-06, standard magnums, ultramags, and 378 wby cases. But I have not done a thing with the short mags so now I got something else to play with I guess.
Keep me advised on your progress with the 7mm. I really like that setup. There are a few hard to reach places in this state where a few mulies can grow old but it takes a man to get there and a real man to get a big gun up there. Not going to see many deer but for a guy who has shot a ton of them and just wants a chance at a monster they are good spots. I just need a super light rifle to do it right. But the shots are typically long, at or above timberline and most times you just can't get any closer. So I guess I am looking for the lightest gun that can shoot the furthest.
I saw two bucks fighting this year while elk hunting that were both well over 30". They were above timberline hanging just under a craggy rim with no way to approach from the bottom. The only way would have been over the top of those crags and mountain climbing gear would probably have been appropriate. If deer season had of been in I would have tried it but with that big 338-378 it would have been a load. Then when I got there I could have killed either with a 243 at 200 yards. But most situations up there you climb the high rims and peak over and the shots are where they are. Point blank to eternity and typically no way to get closer because of straight down rocks and such. You just shoot him, then figure how to get up from the bottom.
Lost in Thought, Please send Search Party!