Bsteele,
It's been done more than once. I wouldn't definately say yes, it's OK. Most reccommend no more choke than M, IC or C would be better I think. A chrome lined barrel is a plus also. A few Ithaca/ SKB doubles have had steel shot through them, this I know has been done with success. There have been several articles written on this. Two that stand out in memory was a Parker 12 and a Win. M12 Duck. Both survived the rigor unhurt. Both had the chokes either opened or tubes were installed. As I recall the Parker was fed reloads.
Chief
