I have a very nice double rifle made in the 1930s, of Austrian make, in its original .270 caliber, the only double rifle I have for non rimmed, flanged, cartridges, and I am fully aware of all the warnings about not having doubles for non rimmed cartridges, due to possible extraction/ejection problems, but, this .270 has been used a lot by me, and by prior owners as well, and it has never, to my knowledge, failed in any way. The Austrians knew how to make these double rifles well, flanged or unflanged.