codyadams
Well-Known Member
So I did a little more load development with my 260 AI and the 143 grain. Shot from a 30" tube using H-4831 powder.
48.6 grains:
1. 2,966
2. 2,981
3. 2,977
4. 2,974
5. 2,956
Average: 2,970
Extreme Spread: 25
4 of the 5 were .475" ctc, with one shot opening it up to 1.175"
48.8 grains:
1. 2,993
2. 2,982
3. 3,017
4. 2,967
5. 2,946
Average: 2,981
Extreme Spread: 71
Again, 4 of the 5 were .422 ctc with one opening it up to 1.252
49 grains:
1. 3,019
2. 2,995
3. 3,023
4. 3,003
5. 3,005
Average: 3,009
Extreme Spread: 24
This group was 1.232", not very good
49.2 grains:
1. 3,008
2. 2,999
3. 3,013
4. 3,020
5. 3,002
Average: 3,008
Extreme Spread: 21
3 of these were .179 ctc, with the other two touching opening the group to .865
48.6 grains:
1. 2,966
2. 2,981
3. 2,977
4. 2,974
5. 2,956
Average: 2,970
Extreme Spread: 25
4 of the 5 were .475" ctc, with one shot opening it up to 1.175"
48.8 grains:
1. 2,993
2. 2,982
3. 3,017
4. 2,967
5. 2,946
Average: 2,981
Extreme Spread: 71
Again, 4 of the 5 were .422 ctc with one opening it up to 1.252
49 grains:
1. 3,019
2. 2,995
3. 3,023
4. 3,003
5. 3,005
Average: 3,009
Extreme Spread: 24
This group was 1.232", not very good
49.2 grains:
1. 3,008
2. 2,999
3. 3,013
4. 3,020
5. 3,002
Average: 3,008
Extreme Spread: 21
3 of these were .179 ctc, with the other two touching opening the group to .865