Based on my experience with the 6-284, I definitely would NOT build a 6.5-284 on a short action. If yours is a long action it should work great. In my 6-284 the 95 grain Berger is the upper limit of bullet length this one will take and still feed from the mag.The potential feeding issue is what gives me pause when it comes to chambering my rifle for 6.5-284. Glad to know that your 6-284 will at least feed acceptably.
hope that helps.
(I just re-read your first post. Obviously a long action. Sorry about the stupid response)