Does ammo velocity directly relate to accuracy?

dryfire said:
Relative to one's expectation of consistency in POI, a deviation of 20-30% "...1800fps and 2300fps.." could have a dramatic effect, even at 150-200yds.
The more consistent the speed (less shot to shot deviation), the easier it will be to "hold-off" or adjust the come-up because all other things being equal the flight path will be nearer the same. Flight time and drop due to gravity have nothing to do with it. This is the whole purpose for reloading for CF to achieve consistency in the ammunition. Unfortunately not possible with RF.

These same effects can be observed at distances even of 100m or less. Speed variations of even 25-50fps have an observable effect on POI at 50 and 100m. Again,the expectation for POI consistency has to be considered.
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flight time and drop due to gravity have LOTS to do with flight path! how in the he11 do you think they DON'T?? if time-of-flight is 4ms or 8ms, the resultant vertical drop due to gravity is next to nil, so the initial velocity could be off by a large amount and not result in any appreciable difference.

the guys who reload CF are the guys who want consistent shots at 300-1000 yards and not the 100-200 yards we're talking here, and guess what - a CF round at 3-5X the distance of a 22WMR round does NOT go flying 3-5 times faster. the vast majority are gonna be around 2x and have to travel 5x the distance. -- assuming 22WMR is 1800fps and the CF is just under 4000fps -- (and ya, those are muzzle velocity, so they're all gonna slow down as the distance builds up)

also, the further out you go, the longer the flight time, the larger the incremental bullet drop (gravity is ALWAYS here, pulling everything down no matter what it is - unless it's less dense than the air in which it is), and the harder it is going to be to have an accurate & repeatable hold-off.
 
"i'm thinking it's more of a case of flight time and more specifically the drop velocity at the target distance. the longer the flight time, the further & faster the bullet is dropping, and the harder it is going to be to have an accurate amount of hold-off."

Quoting you from post #18

I did not say flight time and bullet drop do not have anything to do with flight path. I said and if you reread my last post

"The more consistent the speed (less shot to shot deviation), the easier it will be to "hold-off" or adjust the come-up because all other things being equal the flight path will be nearer the same. Flight time and drop due to gravity have nothing to do with it."

As far as reloading for consistency, shooters of all persuasions practice this. Not only long range specialists. Some of the most ardent are short range BR practitioners (100-300yds). And the more consistent the flight path they can make shot to shot the easier it is for them to hold or adjust for consistent POI.
 
Velocity does affect accuracy, due to barrel harmonics. There would be a sweet spot for each rifle.
A flatter trajectory is not necessarily more accurate. Reloading is mostly centrefire.
 
dryfire said:
I did not say flight time and bullet drop do not have anything to do with flight path. I said and if you reread my last post

"The more consistent the speed (less shot to shot deviation), the easier it will be to "hold-off" or adjust the come-up because all other things being equal the flight path will be nearer the same. Flight time and drop due to gravity have nothing to do with it."
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depending on distance, consistent-but-slow could be much worse than inconsistent-but-fast.

recoil management aside, i'd rather have rounds that do Mach 7 to Mach 10 (wide range), than rounds that do 980fps to 990fps (narrow range) if i'm shooting at a target 300yds away.
 
BP7
One would hope that if examples are used that at least plausible examples are used. Mach 2.5 - mach 3.5 might be more in the realm and even at 300yds any target shooter with experience would argue with you that such variation would be worthless.

kombayotch, who monitors on this site, runs long range RF matches out your
way. www.canadiangunnutz.com/forum/showthread.php?t=488108

You may want to try some of your theories with your inconsistent but fast ammo. If you would be kind enough to give us a range report of your findings.
Regards d.
 
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