Both the BAR (Browning Automatic Rifle) and the Browning machineguns (series 1919) were made in caliber 30-06. HOWEVER, there were other calibers manufactured for special markets. Search Wikipedia for BAR, and look up some of the secondary calibers- they may be a surprise.
243, 270, 30/06, 7mm Magnum, 300 Magnum
They're all designed for the same purpose - to kill something. Although smaller is not necessarily less lethal, smaller calibers generally will be designed for short-range use on small animals and large calibers may be suitable for hunting bear.
yes
Do an internet search for 'Browning luggage case'
7mm Magnum and 300 Winchester Magnum
I am aware of only the following calibers in the B78: 22 250; 6mm Rem, 7mm Rem Mag; 30 06 and 45 70.
Browning has made centerfire lever action rifles in various calibers over the decades.
Between 1973-75
You will need to include a serial number to have your question answered.
W73 to 76 and then to current two letter code
Browning's web site has what you are looking for.
No. The B78 wasn't introduced until 1973 and discontinued in 1982 You need to contact Browning. You can get it lettered for 39.50 USD
Browning.com has a sn function under customer service
No
Both the BAR (Browning Automatic Rifle) and the Browning machineguns (series 1919) were made in caliber 30-06. HOWEVER, there were other calibers manufactured for special markets. Search Wikipedia for BAR, and look up some of the secondary calibers- they may be a surprise.
There are no records of calibers made for each and every Browning rifle model that Browning made. Your question can't be answered as asked