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.
You will have to contact Browning for a correct answer.
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
Each rifle will pattern differently. The perfect ammo loading for one may not work for another.
Only 7mm magnum ammo made by a reputable ammunition maker provided the rifle is in working order.
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.