Comments on: Lapua Offers Radar-Tested Drag Data for Lapua Bullets

By: Jan Krcmar

Jan Krcmar — Fri, 12 Jun 2009 10:25:46 +0000

New program with Lapua Drag Function:

By: Jackie Arrowood

Jackie Arrowood — Sat, 16 May 2009 14:02:18 +0000

Wopuld like to find someone who has load data or load results for the 6.5x.286 caliber, useing Lapua bullets? Best results and accuracy?
Thanks

By: steve

steve — Tue, 03 Mar 2009 19:12:08 +0000

Checked a few of the doppler radar files. I would like to know how Lapua got Mach 5 from a .30-cal bullet?

EDITOR: At sea level, the speed of sound through the standard atmosphere is 761 mph (1223 km/h). Mach 5 would, therefore, be 3805 mph, or 5580 fps. Yep that’s getting up there. Richard Franklin has taken short 30 cal bullets up to the 4500 range with 30-338s.

By: t molo

t molo — Tue, 03 Mar 2009 10:18:44 +0000

wanted to know if there was anyone out there who has info on the manufacture of brass cartridges using drawing or extrusion which ever is more efficient,from 9mm,5.56, 7.62 and the 50bmg.including the type of machinery, raw materials for a full on cartridge manufacturing process

By: t molo

t molo — Tue, 03 Mar 2009 10:17:48 +0000

wanted to know if there was anyone out there who has info on the manufacture of brass cartridges using drawing or extrusion which ever is more efficient,from 9mm,5.45, 7.62 and the 50bmg.including the type of machinery, raw materials for a full on cartridge manufacturing process

By: steve podleski

steve podleski — Mon, 02 Mar 2009 20:05:13 +0000

This drag curve is odd. It shows a drop in Cd between Mach .4 and .8 which should not occur. Maybe there is a bug in the Doppler data reduction software. But it is very nice to see a commercial bullet manufacturer using Doppler to measure Cd.

By: Affe

Affe — Sun, 01 Mar 2009 15:49:05 +0000

Any chance of posting the data for those w/o the program ?