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Reloading
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<blockquote data-quote="DUCKMAN11" data-source="post: 2591101" data-attributes="member: 122313"><p>Chrono comes in at about shot 10. And I say shot #10 because I've seen barrels speed up from 40 rounds to 140 rounds. Find a node where your velocity doesn't change much from let's say 83gr to 83.6gr as an example. Dial in one variable at a time!! DIAL IN ONE VARIABLE AT A TIME!! ONLY DIAL IN ONE VARIABLE AT A TIME!! </p><p></p><p>I get my powder dialed in first. Your velocity in August is going to be different than in December and It doesn't matter what powder you are using. So if you find max pressure in December you could be WAAAAY over pressure in August. As a generalization Higher Temps= higher pressure. Luckily you are not going to be dealing with that in this situation. </p><p></p><p>Find a good wide velocity node under max pressure and stay in that area for powder charge. Then dial in from there with your group size. Find your "range/node" then work from 83gr to 83.6gr in .2gr increments. Finding the node and optimal powder charge "can be" found in 20 rounds. Once I find a good charge I then shoot a 5 shot group to verify. In a case as large as 30noz .1gr of powder isn't going to change things as much as it would in a 223. </p><p></p><p>In my opinion..... a good load is one that I can throw together and shoot sub moa or better. A bad load is one where I have to count kernels of powder and be under 60°f and have between .020" and .023" of jump to shoot one hole groups. I'm not shooting 100yd benchrest I'm shooting hogs using a fence post as a rest...but thats me. I want a pretty broad and forgiving combo.</p><p></p><p>What C.B.T.O. are you using for finding max powder charge? If you a jamming bullets now you could be leaving velocity on the table by hitting pressure early.</p></blockquote><p></p>
[QUOTE="DUCKMAN11, post: 2591101, member: 122313"] Chrono comes in at about shot 10. And I say shot #10 because I've seen barrels speed up from 40 rounds to 140 rounds. Find a node where your velocity doesn't change much from let's say 83gr to 83.6gr as an example. Dial in one variable at a time!! DIAL IN ONE VARIABLE AT A TIME!! ONLY DIAL IN ONE VARIABLE AT A TIME!! I get my powder dialed in first. Your velocity in August is going to be different than in December and It doesn't matter what powder you are using. So if you find max pressure in December you could be WAAAAY over pressure in August. As a generalization Higher Temps= higher pressure. Luckily you are not going to be dealing with that in this situation. Find a good wide velocity node under max pressure and stay in that area for powder charge. Then dial in from there with your group size. Find your "range/node" then work from 83gr to 83.6gr in .2gr increments. Finding the node and optimal powder charge "can be" found in 20 rounds. Once I find a good charge I then shoot a 5 shot group to verify. In a case as large as 30noz .1gr of powder isn't going to change things as much as it would in a 223. In my opinion..... a good load is one that I can throw together and shoot sub moa or better. A bad load is one where I have to count kernels of powder and be under 60°f and have between .020" and .023" of jump to shoot one hole groups. I'm not shooting 100yd benchrest I'm shooting hogs using a fence post as a rest...but thats me. I want a pretty broad and forgiving combo. What C.B.T.O. are you using for finding max powder charge? If you a jamming bullets now you could be leaving velocity on the table by hitting pressure early. [/QUOTE]
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