sorry. Difference between highest and lowest reading over the chronograph. With most of these loads, I clock six rounds though ten or twelve would be more significant. Several batches of six rounds does add up though and gives you and idea of how consistent your loads are.
Today, I loaded all six chambers with a dose of pyrodex p from a measure that would throw 15 grains of fffg. This was behind a 110 grain bullet from one of the replica moulds. Velocities were 793, 808, 824, 818, 829, 816. Extreme spread was 36 which isn't at all bad. Alarm bells would have gone off it one had been way off like low- 793; High-900.
Today, I loaded all six chambers with a dose of pyrodex p from a measure that would throw 15 grains of fffg. This was behind a 110 grain bullet from one of the replica moulds. Velocities were 793, 808, 824, 818, 829, 816. Extreme spread was 36 which isn't at all bad. Alarm bells would have gone off it one had been way off like low- 793; High-900.
