Hey guys, thanks for the responses. I appreciate the suggestions.
You misinterpreted the post. I only used progressive increases in powder during my break in period to check for pressure signs. All loads for groups were loaded with 66 gr. H-4831. I only varied the seating depth of the bullets on these loads. The numbers written in pen on the inside top of the circles are the seating depths. O being .001 off the lands then .040, .080 and .120 off the lands. I've gone through your check list as follows
1. Bedding - perfect not the problem
2. Seating depths aren't consistent. I measured EACH round multiple times using a comparator. Like I said I'm getting very ANAL
3. Neck tension too high. Possible. These loads were virgin Remington brass. I ran them through my Redding competition bushing neck die to uniform them using a .310 bushing. I need to mike the neck wall thickness and adjust bushing size if necessary.
4. Powder charges aren't consistent. I checked each charge multiple times. Refer to #2 Very ANAL
5. Primer seating isn't consistent. All brass has had primer pockets uniformed, flash holes deburred and necks chamfered inside and out. I try to pay attention to the amount of pressure applied to primer seating.
6. Weak striker spring (not the case here as its a new action) Borden, not the problem
7. Poor striker protrusion (not applicable here either). See above
8. Junk scope? New Zeiss Conquest 4.5X14X44. Dam thing better not be junk!
9. Parallax set right? Shots were at 100 yards and parallax was set at 100
10. YOU (shooter) can't hold elevation worth a chit
. More then likely the biggest factor in this equation.
I'll recheck the action screws and other torque settings.
I'm shooting off a pretty solid bench
That was one of my concerns, that maybe I was cleaning too much. I cleaned between groups 1 and 2, but I'm pretty sure I puled the first shot in group 1. I cleaned before group 3 but not for group 4. Group 4 is better then 3. I cleaned before group 5 but not group 6. Again 6 is tighter then 5. I didn't clean for groups 7 and 8. Maybe this rifle doesn't like em .120 off the lands?
I've lighten the trigger up a little and screwed in the over travel screw according to Darrel Hollands article on dwell time. We'll see if that helps
I'm down by Salt Lake City. If you ever get down this way get in touch with me. I'm sure this rifle would appreciate being shot by some one with more experience then me. I never did learn how to dance but I was a pretty good wrestler.
Thanks again guys