Because that's what the bore measured out to.
you should pay about 300 to about 350 dollars for a Remington 243 rifle
Depends on if that model is offered in 243
50-400 usd
Great rifle.
The .243. It's basically a necked down .308 Winchester.
Varmits to deer.
That depends on the exact model of rifle.
Model dependent
That depends on the exact make and model of the rifle itself
500
No
Yes