Chrony not matching Book Data

[buckbrush]

Cronys are just as accurate as other crono's, JohnBarnses of rifle and Handloader as compared them. The club I shoot at has some very expierienced and rich shooters in it. Some guys have compared their oehlrs to cronys, they have gotten the same results.

Make sure your crony is COMPLETLY open, if it isn't, this will affect results. Your load is very light for a .257 roberts and that bullet, esspecially if it has a long throat, I will bet it is a Ruger.

 

[guntech]

Cronys are just as accurate as other crono's, JohnBarnses of rifle and Handloader as compared them. The club I shoot at has some very expierienced and rich shooters in it. Some guys have compared their oehlrs to cronys, they have gotten the same results.

Make sure your crony is COMPLETLY open, if it isn't, this will affect results. Your load is very light for a .257 roberts and that bullet, esspecially if it has a long throat, I will bet it is a Ruger.

What everyone seems to misunderstand is a false reading can be posted by any chronograph, the 35P included. The difference is the 35P will tell you the result is not correct. It can do this because it has measured that velocity through three screens and two cronographs. In the case of an incorrect reading it sees there was too big of a descrepancy with the two velocities measured and it marks that velocity as incorrect.

All the two screen cronographs simply give the velocity recorded whether it is actually correct or not - you will never know if that one veloctiy different than the rest in a string was correct or not.

I accept the 35P as the industry standard and I know if a Crony measures differently which one to accept.

 

[Gatehouse]

Of course false readings can occur....

But how much does this matter to most? At what level of shooting/loading do you have to be at that you care if there is a slight incorrect reading?

When my Chrony gives a funny reading (like registering 1800fps for a 300 mag with a case of powder) I know i's incorrect.SO the data is discarded.

If it is off by a few fps, I don't really mind.

If it is a big concern, you can do the exact same thing as the 35p does by placing a second Chrony behind your first. If there is a difference in speeds, you will see it, and you've saved yoursefl $600 in the process.

Heck, buy 3 Shooting Chronys, you have an EXTRA screen to compare to, and you are still ahead of the Oehlers in cost.

 

[tootall]

If it is a big concern, you can do the exact same thing as the 35p does by placing a second Chrony behind your first. If there is a difference in speeds, you will see it, and you've saved yoursefl $600 in the process.

Heck, buy 3 Shooting Chronys, you have an EXTRA screen to compare to, and you are still ahead of the Oehlers in cost.

Not only that, but if you drill it with a stray bullet, the first two will stop or deflect the bullet, and save the third one!