6 Creedmoor Lapua - Hornady brass test

[lawman29]

I did a test today comparing velocities between lapua and hornady brass for my 6 creedmoor at Cody Shooting Complex (Labradar). Barrel = Bartlein, 29.5", 5r, 8 twist, medium palma. The 6.5 creedmoor lapua brass was necked down, trimmed to 1.905 and lightly neck turned. The hornady brass is no turn.

The load is 39.8 gr H4350 & Berger 105 hybrid (had been using previously with hornady brass). 15 rounds each for test.
Velocity Hornady brass with F210M = 3,076 es11
Velocity Lapua brass with CCI450 = 3,110 es16

 

[Jeff A]

I was interested to see your result specifically the SD & ES numbers. No SD was given but in my opinion, using different brands of primers invalidates the result. I do realize that large and small primers had to be used. Also, if you repeated the test I doubt the numbers would remain the same. Please take no offense.

 

[rardoin]

Was that with new brass or did they have a few firings on them?

 

[lawman29]

Was that with new brass or did they have a few firings on them?

Lapua new, Hornady one firing.

 

[rardoin]

Lapua new, Hornady one firing.

Thanks. It would be a more appropriate comparison comparing fired Lapua cases to fired Hornady cases. I would expect a reduction in average velocity after firing and possible a reduction in velocity spreads once the cases are formed to your chamber. I hope to be sorting out a 6 Creed in the next month or two...or whenever my gunsmith can get around to the build. I will likely be using Lapua Palma cases I formed but never fired in the 6.5 Creed since I hate to let all that work go to waste. I have been using factory Lapua Creedmoor in the 6.5 lately and it is more consistent on target than my first group of 'home brewed' Palma converts. It may be the brass i reformed or that I have now found better loads with the small primer brass in general.

 

[Ironworker]

34 FPS difference. Wow !

 

[Frankr]

Lapua new, Hornady one firing.

lawman let us know which way it goes but my experience has shown the once fired case will pick up a few FPS over a new case. You are going to have to bump the load up in the Lapua barss...