Big game rifles are used to hunt larger prey, such as wild boars and deer. You should have at least 100 to 200 rounds of ammo from game loads. The total of 100 shots itself can last for years hunting larger prey as its primary source of food, provided your rifle looks correctly and is handled correctly with great care. SUVs and trucks can carry a decent-sized load of ammunition, so if running towards you means a cross-country road trip, increase your bill.
On the rifle side, you'll see high-end hunting ammunition at 308 Winchester, 6.5 Creedmore, 338 Lapua, and others representing the New York strip and rib. Basically, it has two uses, so the amount of ammunition needed is high, which is around 500 rounds both to defend your house and to hunt. You can only understand and know the importance of firepower when SHTF, so never neglect your ammunition, as you may need it in the near future. Mark the date of your ammo and store it properly, and if you need bulk supplies, always look for ammo deals to get the most out of your money.
Again, whenever possible, replacing stolen ammunition from your stockpile is a difficult matter in today's madness. You might have a similar situation, or maybe you're a more avid shooter with more time and a fatter ammo bag than I have. Another more accurate way to calculate your training needs is to take the amount of ammunition you shoot per month and multiply it by 12 to give you your annual need for training ammunition. It would be absurd of me to try to tell you specifically how much ammunition you need or how much ammunition will make you competent.
One hundred rounds of ammunition can be purchased per field charge for the shotgun for more than $20 so you can save costs. In addition, if you are training to master different firearms, you are now tasked with stocking training ammunition for each type. Of course, just because you only use a small amount of ammo to maintain your core abilities doesn't mean you're not restarting the cycle to add additional abilities. Fully automatic military fire can actually absorb ammunition, but the vast majority of civilian and LE excitement involves far fewer shots, even with today's semi-cars.