To crony or not to crony

Anything you can learn, or any decision you can make from knowing what the velocity actually is with a given load will become possible. If that is not enough reason, don't buy a chronograph.
 
shooter177 said:
Hi guys I was wounding what a crony will do for me if I have done a ladder test and found my load how would I use a crony to improve,
Click to expand...

At least if you're into ladder testing, you're likely a good enough aim to not shoot your chrony!

Not sure if that's a good enough reason to own one though in your case. But it's only 100 bucks. I figure the more data you have about your loads the better.
 
A crony is good but not a must have

if you have a crony and know your velocity and the correct tables you will then know how many clicks to switch from one distance to another

also if you know your standard devation and other information available you know how good your round is

ie high/adverage/low velocity

ie SD more than 20 :nest:ok:eek: --- SD less than 15 great:cool: -- less than 8 you are a Genius :D----> and don't change a thing
 
If you ever have to choice between your ES and your longrange vertical, believe the target.

If you ever have to choice between your instrument velocity and your drop chart, believe your targets.

These situations happen a lot more than you might think.
 
The key to any kind of successful endeavor is to have the means to measure or compare your observations.

A gun relies on the speed of a projectile it harnesses through it's barrel to exist as the object it was created to be.

If you have the means to measure this wonderful coexistence between bullet and gun in order to make a predictable point of impact, then it would be foolish not to take advantage of it.

Buy it.
 
You use Chrony to find out the velocity of you accurate load.
Knowing that you can establish drop for 200-300-400 .....
 
CeeZer said:
Chrony is - for idiots, like me and a few more... go by your instincts...
Click to expand...

Hmmmmmmmmm, I guess I'm one of those idiots that uses a Chrony to evaluate the velocity & consistency of my handloads. I really envy the experts on here that can tell the velocity of a shot just by the sound :eek:

Last season I was trying to develop a close range bear round from my .270 using Hornady 150gr round nose bullets. I wanted a muzzle velocity of 2400fps. Having a chrony made my job very easy.

If your into handloading having a chrony makes good sense IMHO.

George
 
shooter177 said:
Hi guys I was wounding what a crony will do for me if I have done a ladder test and found my load how would I use a crony to improve,
Click to expand...

I can help you translate that good load to other bullet weights. Sweet spots tend to be velocity dependent. So, if you can get the same velocity with the different bullet it is likely to shoot well too. Same with powder. If you switch powder the chronograph will help you replicate the velocity without going through the ladder test again.

The problem with chronographs is that they are not very accurate based on a single shot. You need averages. I tend to be suspicious of the SD and ES that these things spit out. They are as much deviations and spread of the instrument as they are of the bullet.
 
My dad never had a chrony in his day, but he did use a ladder type test to calibrate his loads to the point where he won top award in the competitions that he was involved in at the time. Although he was only Search & Rescue, he got into some military shooting competing stuff where the Airforce actually won! Yippppeeeee! (Yes, I'm a PMQ brat from way back. So?)

Anyway, as a pistol plinking shooter and reloader I find a chrony very useful because it allows me to fix my powder load to a goal I set, while minimizing recoil effects. Is it essential even for a reloader and bullet caster? No, I guess not.

But I like mine.
 
I never had one - until I decided to compete. You can plink with anything but you don't want to be DQ'd in a match. Still waiting on my Pro Chrono Digital I ordered from Grafs, $112US shipped to the States.
 
They are not an absolute necessity but, if you are pushing the envelope they are very handy. They are also good for determining SD, which is not everything but is a predictor of longrange performance. I have some 8028 loads that over 20 consequetive shots showed a max spread of 4 fps, so I know the Chrony is capable of very accurate measurement. That is far and away ythe best spread I have ever seen. Most loads I use have a max spread as high as 50 fps.

In the same barrel lenght pressure equals velocity. If you get to the same speed as the published load data,using a barrel the same length as the test gun, or speed adjusted for the difference, before you get to the same charge level of powder, you have equalled the published pressure as well. I have seen this MANY times when working up loads, and that is where I stop, especially in cartridges with a SAMII max of 65,000 PSI.
 
They don't help if you've already built a load with ladder development, but it is nice to know how fast, otherwise it's only a guess. Helps to build a ballistics table if you are shooting longer distances too. After the Chrony I went for the the strain gauge on the chamber to measure pressure. I find that's far more useful for load development... but then again I'm a techno geek.
 
junkdude said:
They don't help if you've already built a load with ladder development,
Click to expand...

I'm not too sure...
If you do the ladder at 100yd, your extreme spread and standard deviation might not affect your grouping at 100 as much as it will at 300/600. A good performer at 100yd isn't necessarily the best performer at all and this is where the chrony becomes an interesting tool

YMMV
 
You must log in or register to reply here.
Back
Top Bottom