Typically 1970-1974.
Yes
As far as I know browning did not have any firearms made for them in australia.
Browning has made centerfire lever action rifles in various calibers over the decades.
AFAIK, only if you do a custom order.
AFAIK, Browning didn't make any rifles in that caliber.
Browning made the first sucessful semi auto shotgun over 100 years ago, along with semi auto rifles (BAR from WW 1) pistols (Browning Hi Power from 1935) and machine guns (.50 caliber Browning)
Contact Browning, try e-gunparts.com, any of a dozen stock makers would probably make you one.
Fully automatic shotgun, no. Automatic rifles and machine guns, yes.
Many makers make what you want. You will have to check web sites.
Oh, dude, like, totally! Browning does make a safari bar that can handle the 338 Lapua round. It's like the perfect match for those big game hunting adventures. So, yeah, if you're into that caliber, Browning's got you covered.
Sorry- there IS no ONE "best". Ruger, Browning, Winchester, Savage, Remington ALL make very good rifles- but there are also European makers that have great rifles.
No.the bar action and receiver is not designed to take that long of a cartridge.