eldms
- Thread starter sako2
- Start date
Here is my data with 6.mm CM .264 ELD-Ms for 5 round groups:
130 ELD-M (jumps from 0.038 to 0.041) 0.355 average for 26 groups.
140 ELD-M (jumps from 0.015 to 0.060) 0.357 average for 71 groups.
147 ELD-M (jumps from 0.010 to 0.061) 0.350 average for 62 groups.
There were no particular jump preferences - standard deviation for all groups averaged 0.052.
Here is a bonus answer:
143 ELD-Z (jumps from 0.028 to 0.041)0.309 average for 19 groups with a Std Dev of 0.044.
The results look a bit better because I used powders that had proven the best with the other ELD-Ms
Suggestion: First find which powders that the rifle shoots best before you concentrate on tuning for jump- you'll get more improvement by finding the right powder.
130 ELD-M (jumps from 0.038 to 0.041) 0.355 average for 26 groups.
140 ELD-M (jumps from 0.015 to 0.060) 0.357 average for 71 groups.
147 ELD-M (jumps from 0.010 to 0.061) 0.350 average for 62 groups.
There were no particular jump preferences - standard deviation for all groups averaged 0.052.
Here is a bonus answer:
143 ELD-Z (jumps from 0.028 to 0.041)0.309 average for 19 groups with a Std Dev of 0.044.
The results look a bit better because I used powders that had proven the best with the other ELD-Ms
Suggestion: First find which powders that the rifle shoots best before you concentrate on tuning for jump- you'll get more improvement by finding the right powder.
Seems like some of the F Class shooters like and use them.
Benchrest, ELR, ULR guys stay away from them.
If you have a fast twist, and are pushing them past about 3,000 fps they are known to blow up.
As in you get the boom of the shot, followed by another boom almost immediately after from the bullet coming apart. About 50-100 yards down range.
My Mauser in 284 Win has a long freebore. I can seat the 162s out to where the neck barely holds the bullet. Seated to Hornady's suggested 2.995" i've had them group fairly well. But realistically no better than a Nosler Ballistic Tip.
Bear in mind, it's a hunting rifle, not a heavy barrel.
When shooting matches i'm using Sierra Tipped MatchKings.
Benchrest, ELR, ULR guys stay away from them.
If you have a fast twist, and are pushing them past about 3,000 fps they are known to blow up.
As in you get the boom of the shot, followed by another boom almost immediately after from the bullet coming apart. About 50-100 yards down range.
My Mauser in 284 Win has a long freebore. I can seat the 162s out to where the neck barely holds the bullet. Seated to Hornady's suggested 2.995" i've had them group fairly well. But realistically no better than a Nosler Ballistic Tip.
Bear in mind, it's a hunting rifle, not a heavy barrel.
When shooting matches i'm using Sierra Tipped MatchKings.
kilotanker22
New member
I have had excellent luck with the 140 ELDM in the 6.5 Creedmoor. They seem to like about .025" of jump in that particular rifle. I shoot 3 round groups in the ones, 5 round groups in the threes and ten round groups around half inch. Plus they have a really high BC for their weight.
I have found them to be less sensitive to jump than the ELDX bullet.
I have found them to be less sensitive to jump than the ELDX bullet.
Rimfire and Kilotanker,
You may find this post of mine on another forum of interest. It is about what diameter difference to expect when two groups have a different number of shots fired into them.
You may find this post of mine on another forum of interest. It is about what diameter difference to expect when two groups have a different number of shots fired into them.
Unclenick,
Nice write up.
The difference between 3 and 5 round group averages is predicted to be 1.6679 times.
I just calculated the ration difference between 3 and 5 round groups for 3 rifles in two different calibers.
The average difference for all three rifles came out to be 1.6172.
The largest ratio was 1.6488 adn the smallest was 1.5993.
Considering that there probably is some shooter induced variation in the actual data, I would say the prediction is pretty close to measured reality.
Nice write up.
The difference between 3 and 5 round group averages is predicted to be 1.6679 times.
I just calculated the ration difference between 3 and 5 round groups for 3 rifles in two different calibers.
The average difference for all three rifles came out to be 1.6172.
The largest ratio was 1.6488 adn the smallest was 1.5993.
Considering that there probably is some shooter induced variation in the actual data, I would say the prediction is pretty close to measured reality.