J
jlmj1141
Guest
If the machine no. and speed are the same would the lot no. make a big difference in how it shoots? lot no.252 vs 316. Eley black box match eps.
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C
cadillacjack
Guest
same speed different lot
Experienc has shown me; there will probably be a big difference. But, truly the only way to tell is to try them in your gun. Good Luck!!
Experienc has shown me; there will probably be a big difference. But, truly the only way to tell is to try them in your gun. Good Luck!!
M
MKnarr
Guest
As an example, I tested 4 lots of 2007 Eley Team and chronographed 35 rounds from each lot. Here are the numbers
Lot 02045 listed speed 1072 my average speed 1056 delta 18 FPS STD 9.98 spread 55
Lot 02056 listed speed 1077 my average speed 1048 delta 29 FPS STD 9.80 spread 43
Lot 02254 listed speed 1064 my average speed 1059 delta 5 FPS STD 7.78 spread 36
Lot 02255 listed speed 1062 my average speed 1048 delta 14 FPS STD 8.67 spread 41
All from the same rifle, all fired at the same time, all with the CED MII set at the same distance. Maybe if I tested 1000 rounds my numbers might agree more closely with the listed speed but I wouldn't hold my breath. I realize that there is going to be a difference between my velocity and the listed speed due to barrel, temp, altitude etc but the delta should be close to the same lot to lot. I'm not saying that their numbers are wrong but as pointed out, you need to fire them in your rifle to see what they will actually be as far as FPS as well as accuracy.
Edited to add some data to each lot:
Lot 02045 listed speed 1072 my average speed 1056 delta 18 FPS STD 9.98 spread 55
Lot 02056 listed speed 1077 my average speed 1048 delta 29 FPS STD 9.80 spread 43
Lot 02254 listed speed 1064 my average speed 1059 delta 5 FPS STD 7.78 spread 36
Lot 02255 listed speed 1062 my average speed 1048 delta 14 FPS STD 8.67 spread 41
All from the same rifle, all fired at the same time, all with the CED MII set at the same distance. Maybe if I tested 1000 rounds my numbers might agree more closely with the listed speed but I wouldn't hold my breath. I realize that there is going to be a difference between my velocity and the listed speed due to barrel, temp, altitude etc but the delta should be close to the same lot to lot. I'm not saying that their numbers are wrong but as pointed out, you need to fire them in your rifle to see what they will actually be as far as FPS as well as accuracy.
Edited to add some data to each lot:
Last edited by a moderator:
K
KEN HARPER
Guest
I just tested several lots with my new CED chronograph and found big differences between the printed and actual velocities, usually the actual was faster than the printed. Just out of curiosity, how many shots did you fire in a string and what were the standard deviations?
As an example, I tested 4 lots of 2007 Eley Team and chronographed 35 rounds from each lot. Here are the numbers
Lot 02045 listed speed 1072 my average speed 1056 delta 18 FPS
Lot 02056 listed speed 1077 my average speed 1048 delta 29 FPS
Lot 02254 listed speed 1064 my average speed 1059 delta 5 FPS
Lot 02255 listed speed 1062 my average speed 1048 delta 14 FPS
All from the same rifle, all fired at the same time, all with the CED MII set at the same distance. Maybe if I tested 1000 rounds my numbers might agree more closely with the listed speed but I wouldn't hold my breath. I realize that there is going to be a difference between my velocity and the listed speed due to barrel, temp, altitude etc but the delta should be close to the same lot to lot. I'm not saying that their numbers are wrong but as pointed out, you need to fire them in your rifle to see what they will actually be as far as FPS as well as accuracy.
Hey, always helpfull to see these tests. Do you recall the temp? Barrel brand?
Lastly, in your test, assuming you might have been shooting for group or score, did the 2254 with the ES of 5fps shoot better than the others?
S
schmidp4811
Guest
Eley lot numbers
Last July I chronographed three different lot #'s of Eley Match, all rated @ 1060 fps to see how close reality was to the listed. I fired 25 shot strings of each using my Winchester 52D and CED chrono set at 10 yards. The temp was 64, the dew point 53, the barometer 29.97 and all shots were taken within 75 minutes, first to last at an altitude of 1003 feet above sea level. Results were as shown:
LOT NUMBER HI LOW ES AVE SD
1007-02252 1067 1056 11 1062 3
1007-04160 1064 1050 14 1059 14
1007-04165 1061 1053 8 1057 3
I was very surprised at how close reality was to the listed speeds because of previous experience. The extreme spreads and standard deviations were both obviously outstanding.
Subsequent experience has revealed that in firing for accuracy from the 52D, a 40X, and an Anshutz 1422 sporter, the accuracy varies from day to day and rifle to rifle. I find it necessary to test each lot # in whichever rifle I will be using on that day. It changes, probably depending on atmospheric conditions??
Last July I chronographed three different lot #'s of Eley Match, all rated @ 1060 fps to see how close reality was to the listed. I fired 25 shot strings of each using my Winchester 52D and CED chrono set at 10 yards. The temp was 64, the dew point 53, the barometer 29.97 and all shots were taken within 75 minutes, first to last at an altitude of 1003 feet above sea level. Results were as shown:
LOT NUMBER HI LOW ES AVE SD
1007-02252 1067 1056 11 1062 3
1007-04160 1064 1050 14 1059 14
1007-04165 1061 1053 8 1057 3
I was very surprised at how close reality was to the listed speeds because of previous experience. The extreme spreads and standard deviations were both obviously outstanding.
Subsequent experience has revealed that in firing for accuracy from the 52D, a 40X, and an Anshutz 1422 sporter, the accuracy varies from day to day and rifle to rifle. I find it necessary to test each lot # in whichever rifle I will be using on that day. It changes, probably depending on atmospheric conditions??
M
MKnarr
Guest
Hey, always helpfull to see these tests. Do you recall the temp? Barrel brand?
Lastly, in your test, assuming you might have been shooting for group or score, did the 2254 with the ES of 5fps shoot better than the others?
Reply With Quote
Tim I edited my original post to add some of the requested info.
Sorry for the confusion but the delta that I posted was difference between the listed velocity and the actual velocity.
I was testing these four lots in order to buy a case. The altitude I shoot at is 7000 feet. The rifle is a stock 1411 in a Don Stith Mod 250 stock with a 2 ounce trigger and the stock 27.75 inch barrel. Temp was about 60-65 degrees and humidity here is usually low, 20% or less at times. This was in mid May.
I chronographed 35 rounds from each lot and the average group sizes for 5 groups of each lot were:
lot 02045 .370 STD .118
lot 02056 .359 STD .082
lot 02254 .320 STD .057
lot 02255 .444 STD .156
Based on the group sizes and the velocity spread and STD I bought a case of lot 02254. The group sizes have now shrunk to .259 with a STD of .082 for 12 groups including the original 5 groups.
M
MKnarr
Guest
Tim, even my best lots of Eley Match have spreads of 19, 21, 23 and 28 FPS. Maybe it's my barrel but I haven't seen anything lower. Funny I have a few boxes of a lot of SK STD Plus that always shot well for me. Not as good as the Eley Match but when I finally chronoed it, I was amazed to find the Extreme Spread was only 25 FPS. Better than all the other low end match ammo I have tried.
I just don't know about the elevation, humidity type stuff that's so different out your way. I know that a lot of stuff in the East has come with spreads down to as little as 5-7fps. I would tell you, as well. that a lot of it comes from variences in ignition and really detailing and tweaking the bolt-trigger in most guns can yield surprising increases in consistant ignition. Each gun has it's own little secrets as to where to look and what you might do, even playing with a couple springs.