215 fed primer, 250 speer seated out to max length the magazine allows with 44.5-45 grains grains of IMR 4064 is what most of the guys in my elk hunt club use, most of those BLRs will hold a 1"-1.2" 100 yard group with a decent rest and a good 2x7x scope.
we all sight in to hit 3.5" high at 100 yards
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you simply sight in at 100 yards off the bench on the yellow dot and have all the shots print over the smaller red dot, print the target so you get it sized for 1" squares
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when you get out in the field, hold where the light green dot is it will produce a fatal wound out too a bit past 300 yards, you sure don,t have to use this method or even agree but I can assure you its resulted in a bunch of dead elk

http://www.hornady.com/ballistics-resource/ballistics-calculator

http://www.speer-bullets.com/ballistics/detail.aspx?id=118

http://www.reloadersnest.com/query_bw.asp?CaliberID=191&BulletWeight=250

http://www.loaddata.com/members/search_detail.cfm?MetallicID=1033