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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Preliminary results LOST RIVER 162 Gr 7 MM J40 Ballistics
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<blockquote data-quote="BountyHunter" data-source="post: 24064" data-attributes="member: 12"><p>Daveosok</p><p></p><p>Just food for thought. I have found when in a time crunch or bullet crunch, try the ladder (audette) method of load development. One powder, one bullet, one primer. Most of the time we have a good idea which powder and bullet we want/think will work well to use anyway. Normally I only use Federal primers. Now on LR (single shot) guns I start seating about 1/2 the measurable "jam" mark and that gives me only one way to come, out of the lands. Clean paper target at 200-400 yds one aim point at bottom. Got to zero on dot at bottom of target with starting load, so make 3-5 of that charge bullet. Fire one bullet each time at .2 gr increments on powder. Bullets will move up the target and then tend to cluster into small group for 2-4 shots and then move on up. In 15-20 shots you will find 2-4 sweet spots that shoots well within a powder charge range of .2-4 gr. You must plot each rd on sep sheet of paper (good spotting scope) and record MV. When you look at results pretty easy to pick load at MV you want, that your barrel likes. then just fine tune powder and seating depth. Within the 15-20 shots of a ladder and 3-6 more groups you have a load that your guns shoots very well at MV you want. Saves me from shooting 10-15 three to five shot groups and get same results on which powder load. Still have to work seating, but only coming out, not in and out.</p><p></p><p>As a rule most LR BR shooters have found Sierras like just kissing the lands and the VLDs (Bergers and JLK)like .010-.025 in the lands. That is why I start well in and come out. I would assume the LRBT bullets shoot best well into lands also.</p><p></p><p>BH</p></blockquote><p></p>
[QUOTE="BountyHunter, post: 24064, member: 12"] Daveosok Just food for thought. I have found when in a time crunch or bullet crunch, try the ladder (audette) method of load development. One powder, one bullet, one primer. Most of the time we have a good idea which powder and bullet we want/think will work well to use anyway. Normally I only use Federal primers. Now on LR (single shot) guns I start seating about 1/2 the measurable "jam" mark and that gives me only one way to come, out of the lands. Clean paper target at 200-400 yds one aim point at bottom. Got to zero on dot at bottom of target with starting load, so make 3-5 of that charge bullet. Fire one bullet each time at .2 gr increments on powder. Bullets will move up the target and then tend to cluster into small group for 2-4 shots and then move on up. In 15-20 shots you will find 2-4 sweet spots that shoots well within a powder charge range of .2-4 gr. You must plot each rd on sep sheet of paper (good spotting scope) and record MV. When you look at results pretty easy to pick load at MV you want, that your barrel likes. then just fine tune powder and seating depth. Within the 15-20 shots of a ladder and 3-6 more groups you have a load that your guns shoots very well at MV you want. Saves me from shooting 10-15 three to five shot groups and get same results on which powder load. Still have to work seating, but only coming out, not in and out. As a rule most LR BR shooters have found Sierras like just kissing the lands and the VLDs (Bergers and JLK)like .010-.025 in the lands. That is why I start well in and come out. I would assume the LRBT bullets shoot best well into lands also. BH [/QUOTE]
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Preliminary results LOST RIVER 162 Gr 7 MM J40 Ballistics
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