if the article stated "of EQUAL size" it makes sense but all it said is "The Boberg XR9 Introducing the world's most powerful 9mm pocket-sized pistol." and from the prints, i'm not thrilled about it not having an extractor either.
Because the barrel is longer.
The chamber is DIRECTLY above the top round in the magazine. Any firearm with same length of slide as the boberg will have a barrel shorter by at least the overall length of the cartridge. So the boberg has a power advantage over all other equal length pistols due to the freaky new fangled feeding mechanism that allows for a longer barrel in a shorter slide.
watch the vid
http://bobergengineering.com/video_page.htm
if the article stated "of EQUAL size" it makes sense but all it said is "The Boberg XR9 Introducing the world's most powerful 9mm pocket-sized pistol." and from the prints, i'm not thrilled about it not having an extractor either.
Minor bbl length differences will not achieve the performance increases that they claim.