Lutz's solid copper bullets for Lapua's 6.5X47

[dreever]

Some real interesting reading. Can't wait to see how the 6.5X47 works out.
As to the turned bullets........You think what your paying now for bullets is expensive, I'd bet these little beauties don't stop at fifty cents a piece!

Danny

 

[Forum Boss]

Yes I don't think those German solid copper bullets are going to be very affordable for most of us. But, what is interesting is the thought of "new generation" high-BC, low weight bullets. Having the BC of a 142 SMK in a 109gr format opens up all sorts of possibilities. Hopefully some guys like Bob Cauterucio and the Berger folks will be looking at this opportunity.

David Tubb has really led the way with a very high BC 6mm bullet driven with a medium-sized case. We've seen that it works. Doing the same thing with a bigger bore may add increased barrel life into the equation.

 

[butchlambert]

I question that they can hold the tolerance that we have with our present bullets. I don't think that high speed machine tools can do that.
Butch

 

[dreever]

Didn't Lost River, or somebody play around with the solid bullet thing before? What ever happened with it then.

Danny

 

[sparker]

I have calculated the BC based upon demensions from the 2x scale photos. The G1 BC figures out to .52-.53 . I have calculated similar results using two different programs. The pronounced rounded heel of that bullet will likely suffer boundry layer seperations around 1300fps. Thus,it may not be suitable for long range work. The relatively low sectional sensity of the bullet precludes it from having an extreemly high BC. However,at .525, it has a high BC for its weight. Also, the very small meplat diameter is likely to cause great fluctuations in BC. The 130gr. bullet from Norma should prove to be the best choice for the 6.5X47 cartridge.

Scott Parker
Bakersfield CA

 

[Asa_Yam]

The pronounced rounded heel of that bullet will likely suffer boundry layer seperations around 1300fps. Thus,it may not be suitable for long range work... Also, the very small meplat diameter is likely to cause great fluctuations in BC.

Scott,
Don't be too hasty with the assessments. Lutz has been refining this projectile design for over 3 years, and probably has lots of firing data to explain why particular features of the projectile appear as they do. As for meplat diameter, remember that some of the best .50 BMG projectiles are also machined solids - the meplats of some are so sharp that it is possible to draw blood if one is not careful when handling the projectiles.

 

[rhino]

So why can't they make a 150 gr .700 bc bullet for the 6.5x.284's?

I wonder how fast you could launch the 109 lutz in a 6.5x.284. I am thinking with that bc launched at 3200 fps or faster it might be interesting.

That is if they bullet stayed together.

RHINOUT!

 

[sparker]

Hi Asa,

My analysis was based upon research done by Bob McCoy. I can provide page numbers if you would like them.

Scott Parker
Bakersfield CA

 

[Northman]

Lynn: The person who makes these bullets, visited the makers of GS bullets, and copied them. I read post on accurate reloading, where they where not to happy that he used their design.