You will have to shoot as many different weights as you can to find out. Each weapon will show a preference for one or two projectile weights.
22LR
You will have to contact Browning for a correct answer.
9mm Luger.
Unknown. Depends on the shooter and ammo used.
Ammo and Attitude - 2011 Browning Long Range Challenge 4-7 was released on: USA: 9 November 2013
Yes
Only 7mm magnum ammo made by a reputable ammunition maker provided the rifle is in working order.
Each rifle will pattern differently. The perfect ammo loading for one may not work for another.
Factory ammo, yes.
Component fatigue, ammo, etc..
How much does a white house cost? There are several calibers of Winchester white box ammo, just as there is more than 1 white house. You need to check local shops for the CALIBER of ammo you need.
The Browning shoots 9mm Luger or 9 x 19 it is alo called sometimes.