Interesting chronograph readings today.

C

cpeters

Guest
Had a warm day today 65+ in Missouri so I decided to spend a little time shooting.

I have been shooting some Eley Match off of the 5 machine at 1072 that seems to shoot pretty well in my rifle. Had some other older lot numbers with me an noticed a few of my slower speeds as marked on the box seemed to be printing a little higher and also noticibly louder.

Got my mind working and so I went back and got a chronograph and set it up about 10 ft in front of my bench and watched it as I was shooting.

I thought the data was interesting so I thought I would share it.

Eley Match
1010 5299@1072 measured 1027-1033 fps
1007 2291@1058 measured 1049-1056 fps
1007 4073@1061 measured 1038-1048 fps
1006 1224@1057 measured 1064-1072 fps
Lapua Center X measured 1033-1037 fps

I repeated this with a second rifle and the results stayed about the same.

Obviously it would be best to be using the same year ammo but that is what I had with me at the time.

Next time I am testing ammo lots I will pull out the chronograph just to see how they compare. More than anything I was just really suprised to find that in reality the ammo that I had that according to the box was the fastest was actually the slowest of anything I had with me.

Charlie
 
Charlie:

Your results are the same as mine when I chronograph Eley Ammo.. This is why I have said all along, that the velocity on the different lot #'s is pure BS. It is a waste of time trying to buy the same speed ammo each time, as you do not know what velocity you are buying.. Different rifles are going to shoot the same ammo at different speeds anyway, so the velocity on the box means nothing.. Why do you think RWS and Lapua don't bother with the velocity..?? I, at one time, drank the cool-aid also, but no more... Try different lots and buy the one that shoots the best...

Thanks for confirming my findings..

Dave
 
I agree Dave, I have always bought test lots and tried to buy what was best....but because my rifles seemed to like things in the 1060 range I would normally order test lots say from 1057 to 1063 and pick the machine that my rifled likes with a few other machine numbers to test. Seems like it really takes away the ability to make educated guesses out of which lot numbers to order for testing.

I certainly would not expect the speeds to be exactly the same, but I would expect something that shoots faster in the Eley test rifle would also be faster in my rifle. I certainly would not expect for the box with the highest velocity on the box would indeed be the slowest of the 4 lots I tested.

Charlie
 
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