Field ready with a nylon sling and a full compliment of 150gr b-tips she went 10.5 lbs. The Shilen was cut to 24" and I had dual dovetail rings and bases on her. I considered a full flute and bolt handle job along with some Talleys. But I got a fair price for her and would sooner have a stainless action. This one was off of an old 06 I took in on trade.
As for the round. It gives up nothing to the straight up 280 in a long action. We chambered it to put the base of a 150gr a-bond or b-tip flush with the bottom of the neck with a kiss of the lands. It never went over 1/2 MOA out to 400 with what I intended to hunt with. I want to land closer to 7.5 # field ready and would settle for 8.5 . I still have a bunch of 284 brass here. I was playing with the O.A.L. in the SA Remmy and the 140/150gr pills last evening. It's pretty tight. 55 or 56 grains of RL19 takes up a bunch of room. Maybe one of the short or super short cut powders would come into play. Tempting it is. The 7 SAUM would be sweet,but the way brass is getting you snooze you loose. Your 270 WSM may be the ticket. The same case length problems as the 284 in the short action,but a lot more boiler room.