You will have to experiment to find out. Start with available reloading manuals
Bullet speed can vary hugely between calibers and bullet weights; these need to be known. It is recommended that you do a search on ballistics on the internet and find more specific information.
depends on the bullet different calibers from different guns travel at different speeds comcord traveled at twice the speed of sound
it should shoot 1inch or better three shot group at 100 yards. try different bullet weights.
About .36 caliber. The 9mm family of calibers normally uses a bullet that is .356 diameter. This is the same as the .380 and nearly the same as the .38 Special, whose "nominal" calibers are quite different from their actual bullet diameter when measured.
The DE was made in 3 different calibers. The speed of the bullet depends on what caliber.
The DE was made in several different calibers. The speed of the bullet (FPS) depends on which cartridge.
RPA rifles are made in a number of different calibers. There is not one single caliber- sorry.
Only .223 ammo. There are different bullet weights.
The bullet used in the 7.62 x 38 CARTRIDGE can be of different weights. The standard bullet loaded for the SKS and AK47 is about 123 grains.
The P229 pistol is made in 3 different calibers- one of which is the 9mm Parabellum, also known as 9mm Luger.
You will have to get as many different brands and bullet weights as you can afford and shoot them. Most rifles will show a marked preference for a certain brand/bullet weight.
The proper term is CARTRIDGE- bullet is the part of a cartridge that is fired from the barrel. There is no one answer to your question- it will depend of which .50 CAL cartridge- and then it depends on the loading of that particular cartridge (different bullet weights will have different powders/ amounts)