mdd said:
Peetza, if you want to talk apples to apples, then give the 223 the same twist barrel and feed it the same weight of pills as the 204. I have shot 40's out of my 223, set it down, & picked up my 204 also shooting 40's. Let me tell you, it would take a chronograph to tell the difference in them. You guys cripple the 223 by thinking it needs an uber fast barrel twist to shoot 60+ grain bullets & then bag on it because it gets outrun by all the other varmint calibers. It can be very, very close to 204 performance if configured in a comparable manner as a 204.
Unless you can see the bullets, I'm pretty sure it takes a chronograph to distinguish any two cartridges. That's pretty much why they MAKE chronographs. You can't tell just by looking, hearing, feeling....
Anyway, on the "very, very close to .204 performance", I guess it depends on how you define "very" and "close".
Using the fastest velocity listed by Hodgdon for 40gr .223, which is 3,666 fps, versus the .204 39gr published factory velocity of 3,900fps, JBM ballistics calculator gives the following numbers with a 10mph wind:
.223
300 yards, 2.6 low, 11.4 drift, 350, 7.2 low, 16.1 drift, 400, 13.7 low, 21.9 drift, 450, 22.4 low, 28.9 drift, 500, 33.7 low, 37.3 drift
.204
300 yards, .9 low, 8.1 drift, 350, 4.2 low, 11.5 drift, 400, 8.9 low, 15.7 drift, 450, 15.2 low, 20.8 drift, 500, 23.4 low, 27.5 drift.
So, the .204 maintains a distinct advantage at 300 yards, almost 2 inches at what is not "long range" by most standards and a HUGE advantage at 500 yards, of 10 inches less drop and 10 inches less wind drift.
You can believe what you want, but those numbers are ANYTHING BUT very, very close in my world.