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I had a chance to shoot an Audette Ladder today with a Ruger 6PPC at 200 yds.
I used N135, Sierra 70 gr MK and Federal Match primers. I'd previously shot a ladder with multiple aiming points on a horizontal line and thought it made identifying individual bullet holes easier.
I've also inherited a roll of 36" wide graph paper, which made things even easier.
There were 13 aiming points and powder charges were incremented by 3 graduations on a Redding measure, starting at a setting of 256, or an estimated 27 gr. Each Redding graduation is about .1 gr and each load increment is about .3 gr.
This is a questionable substitute for weighed charges.
The first three shots---256, 259, 262----seemed to go together fairly well with a vertical spread of about .5". A later 3-shot group with the middle load of 259 was about 1" at 200 yds.
Shots 4 through 8-----265 through 277--- had a vertical spread of a little over .5". A later 3-shot group in the middle at 271 was about .75" at 200 yds.
Shots 9 through 11-----280 through 286---had a vertical spread of about .05", 1/2 of .1". A later 3-shot group in the middle at 283 was about .5" at 200 yds.
Shots 12 and 13------289 and 292---were possibly too hot. An additional shot was fired at each mark and neither were very close to the preceding shot If she won't group 2 shots, why fool with it. Limit the working range up through shot 11----286.
With the exception of shot 8, shoots 4 (265) through 11 (286) would have grouped into a 200 yd group of .5" high by .5" wide. Shot 8 is unexplained and won't be disregarded in later testing.
Today has demonstrated the usefulness of the multiple horizontal aiming points. There were 7 6mm bullet holes in an area of .5" X .5". It would have been difficult to impossible for me to have identified each hole in this area if it had been fired at a single aiming point.
I hope to wrap this up with a little more shooting weather.
A. Weldy
I used N135, Sierra 70 gr MK and Federal Match primers. I'd previously shot a ladder with multiple aiming points on a horizontal line and thought it made identifying individual bullet holes easier.
I've also inherited a roll of 36" wide graph paper, which made things even easier.
There were 13 aiming points and powder charges were incremented by 3 graduations on a Redding measure, starting at a setting of 256, or an estimated 27 gr. Each Redding graduation is about .1 gr and each load increment is about .3 gr.
This is a questionable substitute for weighed charges.
The first three shots---256, 259, 262----seemed to go together fairly well with a vertical spread of about .5". A later 3-shot group with the middle load of 259 was about 1" at 200 yds.
Shots 4 through 8-----265 through 277--- had a vertical spread of a little over .5". A later 3-shot group in the middle at 271 was about .75" at 200 yds.
Shots 9 through 11-----280 through 286---had a vertical spread of about .05", 1/2 of .1". A later 3-shot group in the middle at 283 was about .5" at 200 yds.
Shots 12 and 13------289 and 292---were possibly too hot. An additional shot was fired at each mark and neither were very close to the preceding shot If she won't group 2 shots, why fool with it. Limit the working range up through shot 11----286.
With the exception of shot 8, shoots 4 (265) through 11 (286) would have grouped into a 200 yd group of .5" high by .5" wide. Shot 8 is unexplained and won't be disregarded in later testing.
Today has demonstrated the usefulness of the multiple horizontal aiming points. There were 7 6mm bullet holes in an area of .5" X .5". It would have been difficult to impossible for me to have identified each hole in this area if it had been fired at a single aiming point.
I hope to wrap this up with a little more shooting weather.
A. Weldy