What is the main difference between centerfire and rimfire ammunition?

centerfire ammunition is used for muzzleloaders.
centerfire ammunition is limited to low pressure loads.
rimfire cartridges are reloadable.
rimfire primer is in the rim of the casing.

Explanation:

GDP is an indicator of a society's standard of living, but it is only a rough indicator because it does not directly account for leisure, environmental quality, levels of health and education, activities conducted outside the market, changes in inequality of income, increases in variety, increases in technology,

GDP is an accurate indicator of the size of an economy and the GDP growth rate is probably the single best indicator of economic growth, while GDP per capita has a close correlation with the trend in living standards over time.