When a load combination that has the power and accuracy we want is determined, that gun and load can be set. A chronograph can help us determine the consist...In time, the shooting chronograph developed to the point of utilizing optical sensors to take note of the passage of a projectile. Today, more modern-day shooting chronograph involves two "screens" fitted with optical sensing units that indicate the passage of the bullet through them, and after that figure the speed of the bullet as it goes ...Eco-Drive is a model range of watches manufactured and marketed worldwide by Citizen Watch Co., Ltd., powered primarily by light.As of , the company estimated the drive system had eliminated the disposal of ten million batteries in North America. Citizen introduced the Eco-Drive line to Asia, Latin America, and Europe in and to the United States in April, .
· Looking straight back through the "V" formed by the sky-screens, you should be able to see light at the end of the barrel if the gun is positioned correctly. Adjust the height, angle and horizontal position of the chronograph so the bullet will pass through the middle of the "V" below the sky-screens, no less than 5″ above the light ... · When bore-sighting visually, set up the rifle securely on the sandbags and look through the bore, breech to muzzle, lining up the barrel with your aim point on the target. Then (during an appropriate cease-fire), walk behind the chronograph. · · The easiest way to spot a chronograph is by looking at the watch: if it has additional subdials showing second, minutes and hours, it's most likely a chronograph. In addition, having additional pushers/buttons at the side of the watch is a tell-tale sign of a chronograph watch.
· Trying not to look like a complete idiot at the range I did a test fit of the chronograph on my rifle per the instructions and measured everything out to make sure it fit correctly. I got to the range and fired 3 shots with no readings. · During the load dev and testing of the one mile rifle we built for NTRP, we used a beta and a CED to test loads. With the exact same load, the Beta gave us around fps and the CED gave us around . Both units were set up at the same bench at the exact same distance. All reloading components were the same as was the load itself. · When bore-sighting visually, set up the rifle securely on the sandbags and look through the bore, breech to muzzle, lining up the barrel with your aim point on the target. Then (during an appropriate cease-fire), walk behind the chronograph.
· A chronograph is a good tool to have. Your particular gun may produce very different velocities than what is shown in the manual. I load for accuracy over maximum velocity and rely on the target to tell me what the gun likes. · So over the month or so I have been trying to test all the variables possible in my go to load of 28.3 grains of AR Comp and 123 Amax bullet. I have shot about 20 5 shot groups with it as this point at 100 yards and a handful of groups at 300 yards. Today I got a chance to head to my property to shoot it over the chronograph a second time. Last time out I only got 5 rounds measured. · I agree with you that the chronograph is a very useful tool in working-up loads; and, another adjuct in looking for excessive PSI. Velocity does correlate with PSI
· For some one who is starting to really get in to load development and investing some decent money in good equipment, how do I interpret chronograph data? It seems so simple but I know it can be so rich if you look at it right. I know basic statistics, but what should I be chasing? This is, in... · "No mere gadget, the chronograph is one of the most powerful tools imaginable in load development and problem diagnosis. A bullet's velocity is one of the major contributors to its behavior, and if you don't know what its velocity is, you may never understand that behavior. · When bore-sighting visually, set up the rifle securely on the sandbags and look through the bore, breech to muzzle, lining up the barrel with your aim point on the target. Then (during an appropriate cease-fire), walk behind the chronograph.
· The chronograph also gives you velocity spread information. The velocity spread can also be useful in narrowing downloads. If you have two loads with similar accuracy but one load has more consistent velocity from shot to shot, this might help you make your decision. For example, let's say Load A's velocity is , , and . · After throwing 30 rounds down range (two sets of our ladder test), we've got two targets to look at and compare with our speed data gathered with the chronograph. Before we get started with locating the antinode, I noticed two things while conducting this test I found interesting. · The chronograph will still work if the boxes aren't aligned, but all measurements will be either slightly below or above the true velocity. This isn't a problem if you're measuring which load produces the lowest standard deviation, but if you're looking for ….
Standard Chronograph mode, you can select the columns you wish to display. In the other modes, display output is fixed. Proceed to the next screen with the Next button. Main Display
· Once I get a load that looks decent, I will shoot a match to put a lot of bullets down the bore. This generally "settles" the barrel down as far as "speed up" goes. Then I will go back out with a chronograph and "tweak" the load with a "seating depth ladder" and finally a primer test. · Trying not to look like a complete idiot at the range I did a test fit of the chronograph on my rifle per the instructions and measured everything out to make sure it fit correctly. I got to the range and fired 3 shots with no readings. · Unless you run your load through a software program like QuickLOAD, there's no accurate way to predict velocity. Use the test gun in the reloading manual for a reference point. If they used a 4" barrel and your gun has a 5 1/2" barrel, you can expect velocities to be higher .... how much higher will depend on the burn rate of the powder.
· For the reloader, this is an invaluable source of information as it allows them to see the results of changes they make in their load formulas and how they correspond to speed as well as consistency. With that in mind, today we're going to be taking a look at the Caldwell Ballistic Precision Chronograph…Once a good load was found, changing any component could render the whole process useless (since changing components varies pressure and velocity) and one pretty much had to start from scratch if anything changed. A chronograph provides direct insight into what your loads are doing, and what you need to do to make them work better."Ladder Load"
With a clean rifle I put the first shot of the first load through the chronograph, in this case the 79 grain load. I record the information and wait for the barrel to cool completely. For my second shot, I shoot the first bullet from my second load, 80 grains, record the data and wait for the barrel to cool.The best starting point for any load development is a good reloading manual or other reputable source of data about the caliber you want to load and the bullet you want to use. Lyman 50th Edition While reloading manuals may not contain the best load for your gun, they'll give you a …The first electronic shooting chronographs date back to the late 19th Century and relied upon crude arrangements where a bullet cut a wire, which registered an electric pulse. A rather crude affair, but reasonably effective, and useful for military training and experimentation, particularly with artillery. Eventually, the shooting chronograph evolved to the point of using […].