6 ppc speed

[g n brezinski]

sirs,
how fast are the bullets going out of your rifles?
is there a speed that is needed to shoot record groups?
gary b

 

[Dusty Stevens]

Nobody i know chronos their loads we let the target tell us the correct speed. @3400 is average velocity

 

[jackie schmidt]

Nobody i know chronos their loads we let the target tell us the correct speed. @3400 is average velocity

+1

 

[JerrySharrett]

There is more than one accuracy "node" in the tuning of a barrel. Supposedly a node about every 120 fps.

But, we don't tune to a particular velocity. Some are shooting in an over 3,500 fps node and one recently winning Nationals aggs in the 3,100 fps range.

The velocity isn't the important factor, the grouping is.

The recent Berger reloading manual, in the section for the 6 PPC, they don't show loads over about 3,275 fps even though the 3,350 fps range is the norm.

Shoot, then check for accuracy, then check velocity especially if you are a long range shooter since in the 600/1K game velocity spread (ES) is a major consideration.


.

 

[Wilbur]

I know velocity is important, especially to the long range shooter. I don't know how long range shooters use the chronograph to their advantage but they do. It would seem that if they found a load that shot well they would be done but somehow they need to also know that the velocity spread is minimal. I'm guessing that velocity spread equates to accuracy and the longer range (and wind) comes into play such that velocity can be a basis for a good load. Short range Benchrest shooters don't have so much the range and they use wind flags so it's more an exact science. "Exact" is not the right word there but it's as good as I could come up with.

A velocity spread may produce a half bullet hole difference at 100 yards but at 1000 yards a whole bunch of difference.....never mind what the wind is doing because velocity and bullet drop is purely physical.