Re: WHY????
Posted: Mon Feb 27, 2012 6:45 amsimpleman wrote:Ok here's the recipe
Bushmaster upper and lower, Hydraulic buffer and Ross Schuler Brake (Awesome guy).
42 Gr.Win 296
CCI 450
Hornady once fired1.690
FTX 200 OAL 2.203
Light Stab Crimp and Light Taper Crimp.
35 degrees
Here's what came off the burner.
Average Velocity And I say average because you have to average these numbers out.
2330FPS
Extreme Spread 181.6
Standard Deviation 82.86
.84 4 shot group at 100 yards best group yet with 450 that I bought in Dec..
Question
Why does the best group I get come from such extreme spreads and poor SD?
The next best group I got was
38 gr 296
CCI 400
35 degrees
The primer caused a delayed ignition.
Why good group with that load to?
What causes extreme spreads like this?
#1 ---- with 296, you are better off using Winchester Small Rifle or Remington 7 1/2. My preference is with the Winchester primer. It will properly light the 296 and Lil'gun. My experience is the velocities with the CCI primers is 100 to 150 fps less than the Winchester (using the CCI 450). CCI 400's are too mild. I once tried Wolf Small Rifle Primers and I swear I was shooting a Flintlock. The delay was that noticeable.