Berger 7mm 184 gr Hybrid

[Lbart]

The Berger 7mm 184 gr. hybrid has been officially announced - see - http://www.bergerbullets.com/new-7m...campaign=Berger+Team+6.25.18&utm_medium=email

 

[pat fulghum]

Now the big question...

When will Bullets be available to joe blow shooter?

 

[LA50SHOOTER]

I’m guessing inbhe fall time from the conversations I’ve had with Kevin Thomas.

 

[pat fulghum]

I notice that the link in the Original Poster's email will display differently on different browsers.
One key difference being that the "bullet Details" graphic doesn't show up on some browsers... So here it is...



If you compare that to the information from Berger website here which shows the 180 Hybrid as

Part Number: 28407
G1 BC: .680
G7 BC: .349
G7 Form Factor: .915
Minimum Twist Rate: 1:8"

 

[kyreloader]

I notice that the link in the Original Poster's email will display differently on different browsers.
One key difference being that the "bullet Details" graphic doesn't show up on some browsers... So here it is...

View attachment 1054692

If you compare that to the information from Berger website here which shows the 180 Hybrid as

Part Number: 28407
G1 BC: .680
G7 BC: .349
G7 Form Factor: .915
Minimum Twist Rate: 1:8"

I was a little confused with that as well. How can a longer bullet (from the picture) need a slower minimum twist rate? 184g has 1:9, 180 has 1:8?

 

[Immike]

I was a little confused with that as well. How can a longer bullet (from the picture) need a slower minimum twist rate? 184g has 1:9, 180 has 1:8?

What are the bearing surface lengths? Must be the difference.

 

[Ringostar]

What are the bearing surface lengths? Must be the difference.

I was told by one of the testers that the 184 measured .030 longer base to ogive.

 

[p scully]

They shot great out of a 9 twist for me. I did load development at 600 and a 1000 yards. The 9 twist did the job well.

 

[One Shot One Thrill]

What case were you testing in and what velocity range was producing good results?

 

[p scully]

I shot them from a .284 @ 2850 fps. H4831sc was the ticket for my barrel.

 

[One Shot One Thrill]

Thanks.
I'm using the 300wsm. Hopefully by fall they will be available.

 

[Lbart]

I have been shooting 180 grain 7mm’s at velocities from 2800 to 3050 fps in 1k FC matches for 9 years at elevations from sea level to 6700 ft. and have found the 1-9” twist to work quite well. Even shot well with the 195 Berger. If the stability factor calculation says you have lost a few % points don’t sweat it. If they group in a 1-9" ...shoot them..

 

[McStocks]

They've been produced and are just waiting on packaging, etc. If you want on the list for some, let us know!

BTW, we've caught up on our orders of 105 Hybrids, so let us know if you need some! $155/500

steve@mcgeestocks.com

 

[Ned Ludd]

At 2820 fps, a 9-twist should be enough to stabilize the 180 Hybrid and net you the full intrinsic BC as long as the temp is about 65+ degrees with 500+ feet elevation (see output below). Berger's twist rate calculator uses default atmospheric/elevation values of 59 degrees and zero feet elevation, but it's probably not so common to shoot on the beach in November, so I typically use the 65F/500 feet values for an estimate if I don't know the true values where I'll actually be shooting.

Adding an additional .030" to the 180 Hybrid OAL only reduces the predicted effective BC by about 2% for the new 184 Hybrid (see below). That suggests Berger's 8-twist recommendation for the 180 Hybrid was fairly conservative, whereas their 9-twist recommendation for the 184 Hybrid is slightly undervalued. According to their twist rate calculator (assuming the true length of the 184 Hybrid is .030" longer), an 8.5-twist would net you the full intrinsic BC.

 

[KevinThomas]

I helped box and package a couple lots of these yesterday, in order to get them on the truck for an outgoing shipment today. Several hundred boxes on the completed pallet, so those who got their orders in early should be firing up the presses for the next match.

Have fun, and tell us how they perform for you!

 

[KT]

I tested the 184 as well and they shot absolutely awesome. I was running them at 2820 in a .284win with a 1x8.5 Bartlein 5R.

KT

 

[spclark]

180’s shot fine for me @
75°F & ~ 850 ft elevation in a 1:9 twist right at 2,800 fps. Have a 1:8.5 Brux blank needs fitting & chambering, maybe 184’s will be better? Got a thousand 180’s so it might be awhile before I find out....