Mechanical accuracy (if shooting in a vacuum) & practical accuracy are very different things.
I know but I never said anything about pressure in the chamber. I specifically referred to barrel pressure. Sustained pressure equates to better ballistic performance. That happens in longer barrels.I think he's referring to peak pressure, which happens very early on in internal ballistics. Velocity is a result of a pressure differential accelerating the projectile for a longer duration. Peak pressure isn't higher in a longer barrel.
That unburned powder you mention is one of the reasons I mentioned that longer barrels can have more consistent powder burn(and therfore velocity) in comparison to a shorter barrel.
You said, "Longer barrel makes higher pressures. That effects bullet speed and travel." You didn't say "sustained pressure". Longer barrels do not produce higher pressures. The bullet is accelerated for a longer duration.I know but I never said anything about pressure in the chamber. I specifically referred to barrel pressure. Sustained pressure equates to better ballistic performance. That happens in longer barrels.
I’d hate to see what happens when Smokey gets out the red pen and starts correcting.You said, "Longer barrel makes higher pressures. That effects bullet speed and travel." You didn't say "sustained pressure". Longer barrels do not produce higher pressures. The bullet is accelerated for a longer duration.
So now that you say "sustained pressure", you're correct. When you said "higher pressure" you were incorrect.
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FFS…You said, "Longer barrel makes higher pressures. That effects bullet speed and travel." You didn't say "sustained pressure". Longer barrels do not produce higher pressures. The bullet is accelerated for a longer duration.
So now that you say "sustained pressure", you're correct. When you said "higher pressure" you were incorrect.
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It doesn't stay at a higher point. It does act on the projectile for a longer duration. The barrel length just determines at which point in the pressure curve does further acceleration stop. It doesn't increase or decrease the pressure curve itself.FFS…
Did you check the punctuation and grammar too? The point was and still is that the pressure stays at a higher point for a longer period of time in the longer barrel.
What do you win?
As you point out. It’s a chat forum. My point was not an entry into a technical data manual. And it was not intended to be an argument. (There are technical manuals full of that stuff if someone needs to read them.) Simply a general comment that… there is in fact a difference in how barrel lengths effect accuracy. You know… speed, distance, trajectory, and all that jazz.It doesn't stay at a higher point. It does act on the projectile for a longer duration. The barrel length just determines at which point in the pressure curve does further acceleration stop. It doesn't increase or decrease the pressure curve itself.
I win nothing. You're on a gun chat forum in a thread on the effect of barrel length on ballistics. You presented an argument, I presented an argument. We're chatting on a chat forum in order to explore and better understand a topic.
Fact: The word fact was not used in my post.No, facts need to be clarified. What you presented as fact was in error. Forgive me for speaking truth.
Well, you would have to spend 2 more years in medical school.I’d hate to see what happens when Smokey gets out the red pen and starts correcting.
I’ll take the zero.Well, you would have to spend 2 more years in medical school.
It has been said that the way to define horsepower Vs. Torque is...I think peak pressure is hard to understand. It is the same like this one.
Why is torque falling despite higher RPM? Same physics answer.
Now, in case you didn’t know, the reason a longer barrel provides greater performance is that the longer the bullet stays in the barrel, the more pressure builds up behind it. So, while the Barkeep Boot only has 1.68 inches to build up that pressure, the 16-inch Rough Rider has almost ten times that much. Of course, it doesn’t translate to ten times the performance but, as Dustin notes, it’s still “a substantial difference in both velocity and energy.”
1.75"? i still had childrenSo…
The 1.75 inch barrel of a snub nose .38, is going to allow the same pressures to build up behind the bullet before it leaves the barrel, as a 10 inch barrel of a semi auto SBR?
Tell us all how the unburned powder which can be seen in slow motion photography as it leaves that short barrel behind the bullet, is ever utilized like the powder which actually gets burned when the same bullet stays in the longer barrel for more time.
Unburned powder = wasted powder = less pressure.
Complete burn = more force = higher sustained pressure.
ianakia
But... did your pressures increase or decrease after the shot?1.75"? i still had children
still high pressure hahahahaha. You knew I had to go there brother. hahahahaBut... did your pressures increase or decrease after the shot?