I am loading up some 210 gr Bergers for a winchester model 70 in 300 RUM. The problem that I am looking at is that the measurement to the lands is 3.850. The magazine length is 3.595. If I load these rounds to the magazine that will make it a .255 jump to the lands! That seems like a lot to me for Bergers. Question is, should I even bother working up test loads at mag length with this gun with that kind of jump?