Here's a string from a load I worked up.
String 10
1) 2444.0 -16.9
2) 2447.0 -13.9
3) 2453.0 -7.9
4) 2441.0 -19.9
5) 2433.0 -27.9
6) 2486.0 25.1
7) 2471.0 10.1
8) 2517.0 56.1 f
9) 2467.0 6.1
10) 2480.0 19.1
11) 2475.0 14.1
12) 2456.0 -4.9
13) 2453.0 -7.9
14) 2450.0 -10.9
15) 2455.0 -5.9
16) 2454.0 -6.9
17) 2461.0 0.1
18) 2462.0 1.1
19) 2471.0 10.1
20) 2442.0 -18.9
21) 2468.0 7.1
22) 2453.0 -7.9
High: 2517.0
Low: 2433.0
E.S.: 84.0
Ave.: 2460.9
S.D.: 17.9
95%: ±8.3
All the brass has been weighed and sorted in 1.0 gr increments, bullets are 185gr Berger Hybrids, powder is 41.9gr from a Chargemaster. FGMM primers, Redding Type S bushing FL sided (bumped .001"), Forster Ultra Micrometer seater, seated to .020" jump.
Speeds look low because it's a 20" barrel.
How can I improve SD on these loads?
Thanks!
String 10
1) 2444.0 -16.9
2) 2447.0 -13.9
3) 2453.0 -7.9
4) 2441.0 -19.9
5) 2433.0 -27.9
6) 2486.0 25.1
7) 2471.0 10.1
8) 2517.0 56.1 f
9) 2467.0 6.1
10) 2480.0 19.1
11) 2475.0 14.1
12) 2456.0 -4.9
13) 2453.0 -7.9
14) 2450.0 -10.9
15) 2455.0 -5.9
16) 2454.0 -6.9
17) 2461.0 0.1
18) 2462.0 1.1
19) 2471.0 10.1
20) 2442.0 -18.9
21) 2468.0 7.1
22) 2453.0 -7.9
High: 2517.0
Low: 2433.0
E.S.: 84.0
Ave.: 2460.9
S.D.: 17.9
95%: ±8.3
All the brass has been weighed and sorted in 1.0 gr increments, bullets are 185gr Berger Hybrids, powder is 41.9gr from a Chargemaster. FGMM primers, Redding Type S bushing FL sided (bumped .001"), Forster Ultra Micrometer seater, seated to .020" jump.
Speeds look low because it's a 20" barrel.
How can I improve SD on these loads?
Thanks!