I say it, everybody says it, including the rifle and ammunition makers.
.223 Remington is just a trademark.
The standard bullet diameter for ALL modern .22 centerfires is .224".
So it doesn't matter whether you have a .218 Bee, a .219 Zipper, a .220 Swift, a .221 Fireball, a .222 Remington, a .223 Remington, a .224 Weatherby, or a .225 Winchester; they ALL shoot .224" diameter bullets.
(Unfortunately a .22 Jet is .222", an older .22 Hornet is .223", and a .22 Savage is .227", but these are obsolete oddballs, stick to the standard stuff.)
Bullet weights differ for different case sizes, rifling twists, and intended targets, but the diameter is standard.
A 55 grain .224" bullet is fine for cheap .223 ammunition.
But you will not learn how to handload one question at a time on the internet.
Get some books.