>6+25*243
243+7 = 250/10 = 25
25 is faster.
.243 or a 25-06
243
.223 (maybe) definitely a .243. The BEST deer rifle is a 25-06 (Long story short .223 = good not much effect, .243 = GREAT for beginner, later on you will want a 25-06. 25-06 = BEST!)
all of the .25 variations, and 260 to start with.
There is little ballistic difference between the two. The .243 will drop about one inch more at 300yards (between 10 and 11 inches) than the 25-06. However the .243 will have a 10 grain advantage in bullet weight. If you are hunting anything bigger than a prairie dog you might want to go with the .243. Otherwise for general varmiting and target shooting the 25-06 will give you an extremely tiny edge.
for about a nine year old i would say the .243 because it doesn't kick like a mule and it is a extremely flat shooting gun
The opposite of 243 is -243.
How about: 243 = 243.0
Accuracy is entirely dependent on the operator !