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Rifles, Reloading, Optics, Equipment
Reloading
Load development: Seating depth VS Charge weight
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<blockquote data-quote="RockyMtnMT" data-source="post: 1315784" data-attributes="member: 7999"><p>I think this is a very good load development practice. I do a couple of things differently. I do not load touching the lands as it will create higher pressure and I do not like it for hunting. Once had a primer failure and when I ejected the bullet stayed in the lands and I lost a giant mulie. I load and shoot up in charge weight 1 shot at a time watching the group and the vel as well as pressure signs. Depending on the size of the cartridge I will do this in 1 or .5g increments. Once I find the upper end then I will shoot several over the chronograph to verify that ES is good. Then I will shoot for group and make seating depth adjustments shorter until group tightens up. In adjusting seating depth I will not shoot a 3rd shot if the first two did not group. No point in continuing the group if it starts out poor. It won't get better unless it was shooter error. I don't see any point in wasting the resources. Once you find the group that is tightest then you can work on finer seating depth adjustments. At this point the rifle should be shooting quite well and would probable need 300y or more to be able to see the changes.</p><p></p><p>When it comes to hunting accuracy it may not be worth the extra rounds to shave off a fraction of an moa. That you have to ask yourself.</p><p></p><p>With our Hammer Bullets we very rarely ever make a seating depth adjustment and are able to shave dozens of shots off load development. We are usually done finding our top end load in 6-8 shots then another 6-8 shots to verify velocity and zero. If we are not happy with the first powder we try it may take an extra 6-8 shots to work another powder. I like loads that are as close as we can get to full load density at top end. We only switch powders if we run out of case capacity before pressure or if pressure comes too soon. Rarely we will switch powder on the work up if the group as we work up is not consistent.</p><p></p><p>That is how we do it. If we were smart we would tell people to shoot the method that takes hundreds of shots as we would sell more bullets. I would rather use the extra bullets shooting something more fun than paper.</p><p></p><p>Steve</p></blockquote><p></p>
[QUOTE="RockyMtnMT, post: 1315784, member: 7999"] I think this is a very good load development practice. I do a couple of things differently. I do not load touching the lands as it will create higher pressure and I do not like it for hunting. Once had a primer failure and when I ejected the bullet stayed in the lands and I lost a giant mulie. I load and shoot up in charge weight 1 shot at a time watching the group and the vel as well as pressure signs. Depending on the size of the cartridge I will do this in 1 or .5g increments. Once I find the upper end then I will shoot several over the chronograph to verify that ES is good. Then I will shoot for group and make seating depth adjustments shorter until group tightens up. In adjusting seating depth I will not shoot a 3rd shot if the first two did not group. No point in continuing the group if it starts out poor. It won't get better unless it was shooter error. I don't see any point in wasting the resources. Once you find the group that is tightest then you can work on finer seating depth adjustments. At this point the rifle should be shooting quite well and would probable need 300y or more to be able to see the changes. When it comes to hunting accuracy it may not be worth the extra rounds to shave off a fraction of an moa. That you have to ask yourself. With our Hammer Bullets we very rarely ever make a seating depth adjustment and are able to shave dozens of shots off load development. We are usually done finding our top end load in 6-8 shots then another 6-8 shots to verify velocity and zero. If we are not happy with the first powder we try it may take an extra 6-8 shots to work another powder. I like loads that are as close as we can get to full load density at top end. We only switch powders if we run out of case capacity before pressure or if pressure comes too soon. Rarely we will switch powder on the work up if the group as we work up is not consistent. That is how we do it. If we were smart we would tell people to shoot the method that takes hundreds of shots as we would sell more bullets. I would rather use the extra bullets shooting something more fun than paper. Steve [/QUOTE]
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Load development: Seating depth VS Charge weight
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