You will have to shoot as many different bullet weights and brands as you can afford. Most weapons will show a preference for one or two.
7.65 is .32 ACP
50-300 dollars
50-300 dollars
50-250 usd
25-250 USD or so
45 ACP. Have it checked by a gunsmith before firing.
It started out life with one. If you can't find it, get rid of it.
Check with Beretta Customer Service through their website. The oldest maker of guns in the world, Beretta is still in business.
You will have to contact Beretta to find out.
50-250
When you have unlimited ammo and it is only available as a PC mod of the game for COD BO2
50-200 USD or so. It would be better than nothing.