Hmmmm I am sorry to butt in here and stir things up but I am a beliver in the 6x70R for low pressure break open rifles.

There are others here as well that does think like so; http://forums.nitroexpress.com/showflat....;o=&fpart=1

The cal is readily avaliable from Norma:
http://www.norma.cc/sida/eng/jakt/sortiment/sortimenthoger.asp?Kaliber=5

The germans love the cal as well.

However if determind to get a .22 Savage Hi-power then get one they are great in there own way, here in Sweden they are somewhat on a decline since a lot of drillings in 5,6x52R gets rebored and done up in 7x57R due to the increasing number of wildboars and our rules for hunting them.

Best regards Chris