I have a 13" twist Dan Lija SSTL barrel (30") in 405 win (or 40-72 BP) (for a Browning 1885 BPCR) shooting the 430 paul jones/Dan Theodore designed postel style bullet and it outshoots the 45-70 out to 1000 yards.

Pulled it off after 500 rounds as I dont shoot long range anymore and it's sitting gathering dust along with 450 pieces of hornady brass if someone needs it.