140 grain Berger VLD
Re-loader 17 40.4 grains
28 inch Hart tight neck barrel .290
Pressure signs, slightly cratered primer strikes, at 40.7 grains I get a sticky bolt. Most cases are twice fired, about 800 rounds fired.
QL settings I’ve changed. H20 48.9, Case length 1.83, Cart Len 2.79, Start Pressure Friction proofed added 5K to 7393 for Jammed bullet
Listed velocity is 2940 actual velocity is 2825 by crono, but My drop tests tell me the crono is about right.
Shoots good groups, .5 MOA 200-400 yards, a little better than that 500 to 800 yards.
If I raise the bullet weight I have to go to 158 to get close to actual MV, but my BT is 1.278 which is right on the OBT for a 28 inch barrel and it stands to reason as it shoots well. However, QL shows be over 10K more pressure than is acceptable.
I can get the same results by going to .95 on the weighting factor. I’m trying to get quickload to accurately predict bullet weight and charges that get me on the OBT node for different bullet weights without all the trial and error I’ve gone thru finding this one with the 140s.
I assume if I was actually producing almost 76K PSI that I would be showing more pressure signs than I’m getting. My primers aren’t even stamped flat. I’m using CCI 450s.
I welcome any comments, suggestions, etc.
Re-loader 17 40.4 grains
28 inch Hart tight neck barrel .290
Pressure signs, slightly cratered primer strikes, at 40.7 grains I get a sticky bolt. Most cases are twice fired, about 800 rounds fired.
QL settings I’ve changed. H20 48.9, Case length 1.83, Cart Len 2.79, Start Pressure Friction proofed added 5K to 7393 for Jammed bullet
Listed velocity is 2940 actual velocity is 2825 by crono, but My drop tests tell me the crono is about right.
Shoots good groups, .5 MOA 200-400 yards, a little better than that 500 to 800 yards.
If I raise the bullet weight I have to go to 158 to get close to actual MV, but my BT is 1.278 which is right on the OBT for a 28 inch barrel and it stands to reason as it shoots well. However, QL shows be over 10K more pressure than is acceptable.
I can get the same results by going to .95 on the weighting factor. I’m trying to get quickload to accurately predict bullet weight and charges that get me on the OBT node for different bullet weights without all the trial and error I’ve gone thru finding this one with the 140s.
I assume if I was actually producing almost 76K PSI that I would be showing more pressure signs than I’m getting. My primers aren’t even stamped flat. I’m using CCI 450s.
I welcome any comments, suggestions, etc.
