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Rifles, Reloading, Optics, Equipment
Reloading
A few reloading questions for a beginner.
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<blockquote data-quote="BountyHunter" data-source="post: 559720" data-attributes="member: 12"><p>The answer to question one is maybe. Every gun is a beast unto its own. Only way to tell is try it.</p><p> </p><p>The answer to question number two is a resounding NO! </p><p> </p><p>Bullets have different sizes even in the caliber, different bearing surfaces etc. For example Hornady bullets send to be on the fat side. Bullets with the ribs can be driven faster with less pressure versus a jacketed bullets.</p><p> </p><p>Once again start over and test.</p><p> </p><p>Same thing with primers. Actual pressure testing over an Oehler 43 with different primers have shown you can have as much as 5000 psi difference in same load by simply changing primers. So much for all the "exact" QL pressure tests and loads.</p><p> </p><p>IF you do search here on loads say for the 300 RUM for example, you will find that there is about a 4.0 grain difference in what is max in one gun and what is max in the other. It all depends on the individual chamber and throat plus COAL.</p><p> </p><p>Never start at book max, start 10% below and work your way up until you get pressure signs with that particular load and then back off and tweak. </p><p> </p><p>Do not assume that the max accuracy is in or near the lands, sometimes it is as far as .100 off. Plus if you are running them in a magazine, start at max magazine COAL and work backwards. </p><p> </p><p>IF you want for other than mag gun, start in the lands and come back. Pressure goes down as you back off. If you start in the middle, and need to go towards the lands, pressure will increase.</p><p> </p><p>Do not assume again that max velocity is near the lands. It might be and might not be. </p><p> </p><p>Taking internet loads and "ASSuming" they will automatically work in your gun can be dangerous and non habit forming.</p><p> </p><p>However, they do tend to indicate what powders, what load ranges you should look at. Just start low and work up for your gun.</p><p> </p><p>BH</p></blockquote><p></p>
[QUOTE="BountyHunter, post: 559720, member: 12"] The answer to question one is maybe. Every gun is a beast unto its own. Only way to tell is try it. The answer to question number two is a resounding NO! Bullets have different sizes even in the caliber, different bearing surfaces etc. For example Hornady bullets send to be on the fat side. Bullets with the ribs can be driven faster with less pressure versus a jacketed bullets. Once again start over and test. Same thing with primers. Actual pressure testing over an Oehler 43 with different primers have shown you can have as much as 5000 psi difference in same load by simply changing primers. So much for all the "exact" QL pressure tests and loads. IF you do search here on loads say for the 300 RUM for example, you will find that there is about a 4.0 grain difference in what is max in one gun and what is max in the other. It all depends on the individual chamber and throat plus COAL. Never start at book max, start 10% below and work your way up until you get pressure signs with that particular load and then back off and tweak. Do not assume that the max accuracy is in or near the lands, sometimes it is as far as .100 off. Plus if you are running them in a magazine, start at max magazine COAL and work backwards. IF you want for other than mag gun, start in the lands and come back. Pressure goes down as you back off. If you start in the middle, and need to go towards the lands, pressure will increase. Do not assume again that max velocity is near the lands. It might be and might not be. Taking internet loads and "ASSuming" they will automatically work in your gun can be dangerous and non habit forming. However, they do tend to indicate what powders, what load ranges you should look at. Just start low and work up for your gun. BH [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
A few reloading questions for a beginner.
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