Long action round in a short action

[xsn10s]

Benchrest require absolutely flawless feed and ejection, your running so fast if a case hangs up or does not eject your group is screwed!!

Actually if I was into benchrest I'd pretty bummed if I screwed a group due to a hung up case or failure to eject. So I'd rather run a 300 WM in a long action rather than a short action.