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Need Your Advise Re: Chronograph for Reloading

jonbearman said:
So what I get is when you use a chronograph it just confuses the issue by telling you which is the best ,most consistent load and actual speed is to plot trajectory. However the best load it shows you isnt necessarily the most accurate load. In fact it could give you a false sense of what you are trying to achieve.Now that I am completely confused and the op probably has taken the bridge,what next? Is it truly necessary to own one for the imfo it feeds us or not? Some years ago I shot my favorite most accurate woodchuck load I have shot,and it said the load was basically no good. We chrono'ed it several times and the extreme spread was way high and yet at 100 yds to 200 yds it would shoot dime size groups out of a remmy 788 in 22-250.Go figure.

What I see most shooters with chronographs do is merely shoot 10 shot strings. If using a Shooting Chrony that's the limit for a string before it rolls over and starts replacing the first shot with the data from the last one shot.

What I started to do about a year ago is to work up a load by loading and shooting 5 of each powder weight. When I decided on an accurate load bases on the results on the target, I then load a minimum of 25 and shoot them over the chronograph. My Chronograph lets me shoot strings with more than just 10 shots. It doesn't begin a new string until I tell it to. This gives me a much larger data sample for a more accurate set of calculations. All I'm really interested at this point is the average velocity so I can calculate bullet drops for varying ranges. That speed goes into my ballistics computer. As for the load accuracy, I let the target tell the story.

YMMV
 
I think they are a better tool to compare components with than to show optimum grouping compared to speed consistency. Like, showing the effect of powder type or charge or seating depth has on speed.

Accuracy trumps all.


Jim
 
amlevin said:
lpreddick said:
i am using my THIRD chrony currently...yes, two drilled, the third has been wounded.

I found a good use for those cheap Laser Bore Sighters. I got one for about $20 and use it for setting up my Chronograph. Set the rifle up, take aim on your target, secure with a couple extra bags, turn on laser and then just see where the "dot" will pass over the sensors. Easier to set up and $20 worth of insurance against "bagging" another chrono. BTW, do you have them "Mounted" and then display them with all your other "Trophies" 8) 8)

This is what I do, it is a good way to ensure that you don't shoot your chrony but also because you put the rounds through the proper area and so you get more reliable data. The only thing you have to be very careful of is to take the bore sighter out of the barrel before you shoot or else........ talke about KB. What I do is to put the case that I keep the bore sighter in next to the trigger blocking it when I have it out, this way it is harder to blow your gun up.
 

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