No. The .243 is a larger calibre, and the parent case is the .308 Winchester, necked down to accept the smaller projectile. It's considerably more powerful than the .223.
No. This is a .22 caliber vs .243 caliber (.243 being a 6mm).
243 Winchester
.243
the bigger the animal the bigger the caliber of rifle and the heavier the bullet i.e deer 150 grain bullet 243 caliber and up moose 30-06 180 grain and up for both
Caliber is .243, buy ammo in .243.
yards are bigger than inches as there is 3 ft or 36 inches in 1 yard
@ 12
Well, it is a rifle, but dozens of companies make rifles in .243 caliber.
100-300
The twist rate in a Winchester 670, 243 caliber is 1:10.
Size of the rifle will vary, depending on make/ model. The 30-30 BULLET is larger in diameter and weight than the .243, but has less energy. This is due to a slower bullet.