Remember the Wolf Pup. The entire neck is only .085 long. Here, enjoy...
http://benchrest.com/showthread.php?71958-Wolf-Pup-Al-Nyhus&highlight=Wolf
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If the Schuetzen guys didn't have iron sights as a part of their format (& maybe offhand), I'd have loved it. I followed it enough to read, as Roland says, that breech seating the bullets was the preferred method. I often wondered what it would take to breech seat a jacketed bullet. Might not be possible, and the shooting would be slow, of course.
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A guy who posts here, 4Mesh, for a time held the 1,000 yard 10-shot group record. The day he fired it, some of his necks were split -- well, not just that day, *that* day he just happened to get a record.
A lot of what we do doesn't matter. But you can't rule it out, because in combination with other things, it can matter. See the thread of the dreaded 2&1, where one side says a rifle riding on the stitches of the rear bag is just ideal; the other says it's terrible. Now something is going on here. What's really interesting is what that other factor(s) is (are). Neck length & neck tension are, I suspect, like that.
If you were around before the N-133 days, you'd remember that most people didn't use much neck tension. I never needed an arbor press, thumb pressure was enough. But N-133 "likes" a lot of neck tension, so the say. Or ... maybe it's just harder to set off. I wonder what a lot of bullet jam, a 2-degree half cone angle for the leade, and CCI magnum primers would do combined with light neck tension?
Lots of etcs.