Broz
Well-Known Member
Well if you guys that have LB3.0 figured out are not sick of me or mad at me yet, . I would like to ask for assistance. I feel, or, I hope, I have enough good solid data gathered to tune the curve in LB 3.0. I will give a summery of what has been done and rifle specs and see what you all think is needed to get my dial ups to match my drops.
Here we go.
Rifle is a .338 Lapua mag with 1 in 10 twist 27.5" tube.
Load is Lapua case, 91.5 gr of H-1000, CCI 250, .015" off the Lands.
Chrono was 2820 but I have found this chrono to be 30 fps fast when compared to others. So I feel 2790 MV is accurate.
ES is in single digits with 5 tested.
Sight in data:
MV 2790
BC .455 / G7
DC .500
Click setting .250
Sight Height 2.10
Zero Range 300 yds
zero height 0
incline 0
Zero was dead on 3 shots touching
700 yards test
FC= temp 68*
Baro=25.8
Alt= 3920
Overcast, light head wind 3 mph to 0
Group average was 2.5" low 10.5 moa up was used
1042 yard test
FC= temp 68*
Baro= 25.8
Alt= 3920
5 mph 12:00 head wind, light mirage, .25 moa added for headwind
Average group was 10" low 21.75 moa up was used
1342 yard test
FC= 68*
Baro= 25.68
Alt= 4054
Mirage increasing, overcast to sunny, 11:00 wind at 6 mph
Group average was 5" low 34.25 moa up was used.
I just shot these 3 test groups. The Bergers were holding .6 moa at 1342 and .5 moa or less at 1042 and 700.
I also have the windages used but would like to get the ups dialed in first.
I do appreciate any and all help. I really need this perfected to extend my effective range for hunting past 1150 yards.
Thank You!
Jeff
Here we go.
Rifle is a .338 Lapua mag with 1 in 10 twist 27.5" tube.
Load is Lapua case, 91.5 gr of H-1000, CCI 250, .015" off the Lands.
Chrono was 2820 but I have found this chrono to be 30 fps fast when compared to others. So I feel 2790 MV is accurate.
ES is in single digits with 5 tested.
Sight in data:
MV 2790
BC .455 / G7
DC .500
Click setting .250
Sight Height 2.10
Zero Range 300 yds
zero height 0
incline 0
Zero was dead on 3 shots touching
700 yards test
FC= temp 68*
Baro=25.8
Alt= 3920
Overcast, light head wind 3 mph to 0
Group average was 2.5" low 10.5 moa up was used
1042 yard test
FC= temp 68*
Baro= 25.8
Alt= 3920
5 mph 12:00 head wind, light mirage, .25 moa added for headwind
Average group was 10" low 21.75 moa up was used
1342 yard test
FC= 68*
Baro= 25.68
Alt= 4054
Mirage increasing, overcast to sunny, 11:00 wind at 6 mph
Group average was 5" low 34.25 moa up was used.
I just shot these 3 test groups. The Bergers were holding .6 moa at 1342 and .5 moa or less at 1042 and 700.
I also have the windages used but would like to get the ups dialed in first.
I do appreciate any and all help. I really need this perfected to extend my effective range for hunting past 1150 yards.
Thank You!
Jeff