If it is consistently the the third shot I would, using your
1 check bedding and scope.
2 adjust seating depth
1 check bedding and scope.
2 adjust seating depth
Bullet jump
- Thread starter Trad_man
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Good suggestions by very experienced shooters/reloaders above. Most of my fliers are caused by the shooter. Mirage contributes to some of longer range fliers when I do not allow for time to cool things down.
BrentM
Well-Known Member
First I'd check sd and es. If those aren't low then I'd say you have a pressure spike or change that is making that flyer hit a barrel node outside the other two. So basically not a stable load. Do a Saterlee ladder, set the jump to about 20 thou, if it'll mag feed, and rework the load via a velocity ladder
Another option is to shoot 1, set a timer to 5 min. Shoot 1 repeat for a 5 shot group.
Another option is to shoot 1, set a timer to 5 min. Shoot 1 repeat for a 5 shot group.
Or longer...
I love those type of groups - 2 nearly touching at 1000 yards then that darn "flier" messing up my group! Just random luck of bullets in a group landing close to each other. With just 3 shots you might get really lucky and they all touch! Holy Grail?Shoot 5 to see whats really happening.
BrentM
Well-Known Member
Looking this over, with fps data, you have barrel time node at 65.5 and 68. I don't know if you have velocity node so just for arguments sake and 100 yard groups that is the 2 that stand out to me. If 68 is not showing any pressure issues I'd run a test 67.8, 68, 68.2 and round robin shoot the test without getting the barrel hot. If one of those is better than the others you can tweak the seating depth to fine tune before trying a micro tune.
Try a five shot group see if it throws the next two
It could very well be the rifle, but tuning neck tension can make a profound difference in eliminating fliers.
I just ran a 10 shot ladder test the other day at 100 yards in 2-5 shot groups. These are all different powder charges .3 grains apart with an ES of 164 and an SD of 48. The neck tension is .002"
It's a 308 Winchester, I use a standard RCBS full length sizer die and a 21st Century Innovation Mandrel die.
I just ran a 10 shot ladder test the other day at 100 yards in 2-5 shot groups. These are all different powder charges .3 grains apart with an ES of 164 and an SD of 48. The neck tension is .002"
It's a 308 Winchester, I use a standard RCBS full length sizer die and a 21st Century Innovation Mandrel die.
ShtrRdy
Well-Known Member
Which bullet and powder were you working with?
IMR 4064 and Sierra 180 Pro Hunters. I realize it's not a common result but I have eliminated the majority of fliers by tuning neck tension.
Trad_man
Well-Known Member
Low, 62grs high is 68grs. From this recipe sheet. Its working for me. Just like the 3rd shot jumping.
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stonehands1
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My opinion (for what its worth) is that 869 is to slow for a 23ish inch barrel rifle. Rl23 or Rl26 would be more suitable in your rifles barrel length. You should be able to match the speed while not blowing 10 grains of powder out the end in a big flame...but big flames are cool!
Also when using a spherical powder like 869 you will most likely get better results with a magnum primer vs a lr primer.
But before wasting any more components...as Denrik in suggested be sure to bed the action and clearance the barrel first.
Also when using a spherical powder like 869 you will most likely get better results with a magnum primer vs a lr primer.
But before wasting any more components...as Denrik in suggested be sure to bed the action and clearance the barrel first.
