You can fish those without a bead. Even with a bead, you'll likely need a small shot or two depending on the velocity and depth of the current. I typically fish my nymphs in-line, tying the smaller of the two about a foot off the bend of the first.
Source: http://www.paflyfish.com/modules/newbb/viewtopic.php?topic_id=17453&forum=21
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