Hornady ELD-X Official Thread

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[NW Hunter]

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[Elkhunter1983]

Would be nice to see bearing surface and length stats to keep us happy until they come out.

 

[Swamplord]

That slightly longer bearing surface will benefit my new series of wildcats where I am limited in cartridge overall length, the 300 AKSM in pic is loaded with a 215 gr Berger and the 7mm is with a 195 gr Elite, in both the bullet is seated at 3.00" and case mouth is right at the start of bullet ogive, pretty much stuck with one seating depth and hope they will shoot...... The 30 cal 210 Berger and 7mm 180 gr were a much better case fit....... the ELD-X bullets will be optimum for these wildcats, 300 WBY mag ballistics in a Rem 700 short action Mountain rifle , can't wait !

 

[AaronSkipDavidson]

Would be nice to see bearing surface and length stats to keep us happy until they come out.

Caliber, Length, Bearing Surface, Minimum Twist

6.5 – 143, .555", 1-8.5"
7 mm – 162, .533", 1-9.5"
7 mm – 175, .570", 1-8.75"
30 – 200, .630", 1-10"
30 – 212, .626", 1-10"
30 – 220, .730", 1-10"

 

[Swamplord]

Caliber, Length, Bearing Surface, Minimum Twist

6.5 – 143, .555", 1-8.5"
7 mm – 162, .533", 1-9.5"
7 mm – 175, .570", 1-8.75"
30 – 200, .630", 1-10"
30 – 212, .626", 1-10"
30 – 220, .730", 1-10"

Awesome !
Thank you so much for posting that , would also like to see bullet lengths and #'s for the 338 cal ELD Match bullet .... if possible

 

[Pdvdh]

That's a substantially longer bearing surface on the 212gr .308 ELD-X (0.626") compared to the Berger 210gr VLD (0.529"), and even more so compared to the Berger 215gr Hybrid (0.463").

Many folks report being able to launch the 215gr Hybrid 50fps faster than the 210gr VLD in 300WM class cartridges, even though the 215gr Hybrid weighs 5gr more. This due to the 0.066" shorter bearing surface on the 215gr Hybrid.

The bearing surface on the 212 ELD-X is .097" longer than the 210 VLD, and .163" longer than the 215 Hybrid. I can't see how that bodes well for 212 ELD-X MVs. That longer bearing surface will put the damper on 212 MVs, compared to either Berger bullet.

A bit worse yet, the 220gr ELD-X bearing surface is 0.730"

I like tipped bullets, but I'll wait until I see what MVs folks are able to safely achieve with the ELD-Xs.

 

[gohring3006]

That's a substantially longer bearing surface on the 212gr .308 ELD-X (0.626") compared to the Berger 210gr VLD (0.529"), and even more so compared to the Berger 215gr Hybrid (0.463").

Many folks report being able to launch the 215gr Hybrid 50fps faster than the 210gr VLD in 300WM class cartridges, even though the 215gr Hybrid weighs 5gr more. This due to the 0.066" shorter bearing surface on the 215gr Hybrid.

The bearing surface on the 212 ELD-X is .097" longer than the 210 VLD, and .163" longer than the 215 Hybrid. I can't see how that bodes well for 212 ELD-X MVs. That longer bearing surface will put the damper on 212 MVs, compared to either Berger bullet.

A bit worse yet, the 220gr ELD-X bearing surface is 0.730"

I like tipped bullets, but I'll wait until I see what MVs folks are able to safely achieve with the ELD-Xs.

This is a good point. I was under the impression the bearing surface was shorter than the 208 Amax.

 

[gohring3006]

Caliber, Length, Bearing Surface, Minimum Twist

6.5 – 143, .555", 1-8.5"
7 mm – 162, .533", 1-9.5"
7 mm – 175, .570", 1-8.75"
30 – 200, .630", 1-10"
30 – 212, .626", 1-10"
30 – 220, .730", 1-10"

Aaron, how do you compare the velocity with maybe the 208 Amax or 210 Berger?

 

[Edd]

Is there any real data anywhere that confirms a longer bearing surface equals slower velocity?

 

[gohring3006]

It seems more surface area contacting the bore, more friction.
Which raises pressure so less powder is used. So more friction and less powder means slower velocity. At least this is how I figured it any way.

 

[Pdvdh]

10-4. That's why moly and HBN coated bullets can be driven to somewhat higher velocity, compared to uncoated bullets. The HBN reduces the friction between the bullet and the bore. A longer bearing surface means more friction between the bullet and the bore.

Is there any other plausible explanation as to why a 215gr Berger Hybrid can be launched 50fps faster than a 210gr Berger VLD in the same rifle, same casings, same powder, same primers, same seating depth off lands, same temperature, slight difference in powder charge?

 

[GTN]

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[doverpack12]

It seems more surface area contacting the bore, more friction.
Which raises pressure so less powder is used. So more friction and less powder means slower velocity. At least this is how I figured it any way.[/QUOTE

Velocity is directly related to pressure.
So if the longer bearing surface does indeed raise pressure requiring less powder then Hornady just saved us powder on every shot to get the same performance in terms of velocity.