7mm 180 eldm BC

[Trm82]

Hey Guys , has any body confirmed the bc on the 7mm 180 eldm ? They say 0.796 g1 but I just don't see it. I have a few of them and a 28 that just got done so I'm debating on trying to make those my bullet of choice .
Looking at them I could see 0.700 but 0.796 seems like a lot.
Thanks

Left to right with advertised BC is
175 eldx G1 0.689
180 eldm G1 0.796
180 vldh G1 0.673
175 EH G1 0.656

 

[308win]

I apologize as I do not have the answer to your question, but I do suggest using G7 with low drag boattail type bullets. G1 is typically used with flat based bullets. Also, Hornady's 4DOF works well with their bullets. Good luck with your 28

 

[Trm82]

I apologize as I do not have the answer to your question, but I do suggest using G7 with low drag boattail type bullets. G1 is typically used with flat based bullets. Also, Hornady's 4DOF works well with their bullets. Good luck with

Oh yes I do use G7 when I'm out shooting.

 

[entoptics]

I ran 24 of them past my LabRadar and used the tracking files to calculate the B.C.

7 Rem Mag, X-Caliber bbl, 1:8 5R, 26", ~2850 - 2950 fps

The average was 0.729 G1 for 24 recorded shots. Max = 0.773, Min = 0.684

One caveat. My rifle was causing them to blow up in flight about 1 in 10 shots, so it's plausible the B.C. values I got might be a little off, and have more variation, since the bullets were clearly unhappy in some way or another.

I was pretty bummed about the detonations, as they shot EXTREMELY well when they did make it to the target. Hornady gave me a free box of 175 ELDX in compensation though, and those work really well for me too, with an ~0.700 G1 B.C.

 

[7.62 Gunner]

I ran 24 of them past my LabRadar and used the tracking files to calculate the B.C.

7 Rem Mag, X-Caliber bbl, 1:8 5R, 26", ~2850 - 2950 fps

The average was 0.729 G1 for 24 recorded shots. Max = 0.773, Min = 0.684

One caveat. My rifle was causing them to blow up in flight about 1 in 10 shots, so it's plausible the B.C. values I got might be a little off, and have more variation, since the bullets were clearly unhappy in some way or another.

I was pretty bummed about the detonations, as they shot EXTREMELY well when they did make it to the target. Hornady gave me a free box of 175 ELDX in compensation though, and those work really well for me too, with an ~0.700 G1 B.C.

What's your barrel looking like the first few inches beyond the throat I wonder?
Do you have a high round count?
I've heard about the blowups but with the 500 or so I've shot its never happened.

 

[martinakl]

Hornady gives multiple BC's for that bullet, depending on barrel twist rate and speed. Printed BC's (for all bullets) seem more like a starting point than an absolute.

Their phone app is pretty nice for their bullets.

Source:

Ballistic Coefficient - Hornady Manufacturing, Inc

A-Tip®, ELD® Match, and ELD-X® Ballistic Coefficient Values Hornady originally published “800 yard”* average Ballistic Coefficient (BC) values for ELD-X and ELD Match bullets. This was done to provide the most usable BC from a trajectory prediction st...

www.hornady.com

 

[entoptics]

What's your barrel looking like the first few inches beyond the throat I wonder?
Do you have a high round count?
I've heard about the blowups but with the 500 or so I've shot its never happened.

Tested the ELDMs back when she was pretty much new. I have a bore scope, and the barrel was smooth as a babies butt when I got it.

No real explanation for the problem. Perhaps just a bad box of bullets?

Never tried them again since the 175 ELDX grouped nearly as well, is a "hunting design", and carried all the freight I needed out to the ranges I can hit a pie plate. Also, this was about 2 years back when 7mm projectiles were harder to find than unicorn tears...

That said, the next 7mm barrel I get will definitely get a chance to redeem them. The accuracy and B.C. is near enough witchcraft for the 7mm class.