Why bullpups?

[stanc]

I've just updated my web article looking at the pros and cons of bullpups...

I will at some point extend the final paragraph to include an analysis of the benefits of long barrels when designing future ammunition. These thoughts were prompted by some work done by a gun experimenter with a hacksaw, who kept chopping more and more off a barrel of a .300 Win Mag to measure the result in muzzle velocity. Interestingly, he concluded that the MV of the magnum from a 16" barrel would be the same as for the same bullet fired by a .308 Win from a 24" barrel...

Perhaps 20 years ago there was a similar experiment published in a Scandinavian magazine (VAPEN, IIRC), in which the author incrementally cut down the barrel of a 6.5x55 Mauser. I wish now that I'd kept the article, as it might've given good data for comparison to 6.5 Grendel and 6.5 GPC.