As above.
Who cares - if you like it, it feels good, you shoot it well etc. Overall weight, choking (because our guns have fixed chokes!), stock and forend shapes, balance etc are more important.
Interesting theory re 2x LOP; there's also Greener's 40x calibre. For me they both work out at or about 29"; a lot of Woodwards bear that length too.
RG