You must specify what you desired end result is and on what medium.
the bigger the animal the bigger the caliber of rifle and the heavier the bullet i.e deer 150 grain bullet 243 caliber and up moose 30-06 180 grain and up for both
You can shoot any weight bullet through the rifle that is loaded for that caliber. Generally, you choose the weight bullet appropriate to the game you are shooting. The heavier the bullet, the better penetration you will get for heavier game.
It can vary from 2000-2800 + FPS
probably a little heavy. go around 90 or 100 grain for the 380
The grains of a bullet, be it black powder or not , is the weight of the bullet. Lets say you have a .50 caliber rifle, and fire a 250 grain bullet at a target and hit dead center. Then fire a 300 grain bullet, that bullet will hit slightly lower on the target , but will have more force or stopping power" due to the weight. So the higher the grain the heaver the bullet.
No one. A standard .45 ACP bullet is about 230 grains. A .45 caliber bullet that only weighed 50 grains would merely be a very thin disk of lead.
Not enough information to answer. What caliber? What type of bullet? What is the initial velocity? How high are your sights above the bore axis? At what range is your far zero?
It depends on Long, LR, Extra Long, etc. I would say average grain is about 40.
Grain refers to the weight of the bullet when measured on a powder scale.
Grain generally refers to weight- of bullets and gunpowder. The Mossberg 45B was a caliber .22 Long Rifle firearm. .22 LR is tpically a 40 grain bullet weight cartridge.
The weight of the bullet. They can range from 25 grain (Small rifles) to over 400 grain for big game.
Grains refer to the bullets weight. A 40 grain bullet weighs four grains more than a 36 grain bullet. It's a little heavier, that's all.