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Rifles, Reloading, Optics, Equipment
Reloading
VLD question
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<blockquote data-quote="300rum" data-source="post: 931718" data-attributes="member: 6231"><p>Dear Vahena</p><p></p><p>It's good to be safe. And never ever cut corners on reloading.</p><p></p><p>Yes all the books or internet powder chart are using very very safe loads.</p><p>Lets make it CLEAR...</p><p></p><p>First when you choose the powder you have to look for the EXTRUDED EXTREME POWDER (is the less sensitive to temperature variation)</p><p></p><p>For your 7rm you chose the best powder H1000 (0.21 fps per degree) </p><p>that is mean from 10F to 52F your bullet speed load is almost the same (up to 1200 yards)</p><p>In other words your summer load will stay the same in winter without speed variation.</p><p>Other good powder is RETUMBO</p><p></p><p>So if you go to Hodgen Reloading Powder website you will find the following</p><p></p><p></p><p>69.0 starting load</p><p>2,744 starting speed</p><p></p><p>71.0 max load</p><p>2,806 max speed</p><p></p><p>Now all this are way off. The load is made at sea level, with 24in barrel and bullet seated away from the land</p><p></p><p>The data is helping you to get the starting point charge.</p><p></p><p>1. You have to find the maximum charge on your rifle</p><p>2. back off one grain</p><p>3. fine tune the load (with seating depth)</p><p></p><p>To do that you have to do the following</p><p>1. find where is your land and go 10 thou in land with bullet</p><p>2. reload in increment of 0.5gr from 69 to 72gr (69, 69.5, 70, 70.5, 71, etc)</p><p>3. reload just one round for each increment</p><p>4. go at 200-300 yards and aiming at the same point shoot every round STARTING FROM 69 - and go up to 72</p><p>5. PAY ATTENTION TO FIRST SIGN OF PRESSURE (hard lifting the bold, hard extraction of the brass out of chamber, primer flattened) and STOP RIGHT THERE.</p><p>6. lets say you got the first pressure signs at 71.5, then back off one grain at 70.5)</p><p>7. 71.5 IS YOUR MAXIMUM CHARGE - FOR YOUR RIFLE (not your buddy rifle or the rifle of powder company)</p><p>8. ALWAYS AND ALWAYS YOU HAVE TO FIND WHAT IS YOUR MAX POWDER CHARGE FOR YOUR RIFLE</p><p>9. go home and reload 70.5 - 5 rounds</p><p>10. test the group</p><p>11. for fine tuning - keep everything the same and just play with seating depth in increment of 3 thou. until your group is tight enough for your application.</p><p>12. mark the load on the book and that is your load for using 168VLD with H1000</p><p>14. it is very important to redo the above if your batch of powder is different. Keep in mind you can get big variation on pressure just having different batch of powder.</p><p></p><p>If you look on the 1 lb bottle you will find the #0000 number (this is the batch number)</p><p></p><p>Make sure all are the same.</p><p>If you have different numbers (just mix all the batches together ) to uniform them and then do the load testing.</p><p></p><p>YOU CAN INJURE YOURSELF... if you don't follow the above.</p><p></p><p>Safety first. As you noticed you are loading with 1-2 gr more then the book advised. Don;t worry. At first sign of pressure stop and back off one grain...</p></blockquote><p></p>
[QUOTE="300rum, post: 931718, member: 6231"] Dear Vahena It's good to be safe. And never ever cut corners on reloading. Yes all the books or internet powder chart are using very very safe loads. Lets make it CLEAR... First when you choose the powder you have to look for the EXTRUDED EXTREME POWDER (is the less sensitive to temperature variation) For your 7rm you chose the best powder H1000 (0.21 fps per degree) that is mean from 10F to 52F your bullet speed load is almost the same (up to 1200 yards) In other words your summer load will stay the same in winter without speed variation. Other good powder is RETUMBO So if you go to Hodgen Reloading Powder website you will find the following 69.0 starting load 2,744 starting speed 71.0 max load 2,806 max speed Now all this are way off. The load is made at sea level, with 24in barrel and bullet seated away from the land The data is helping you to get the starting point charge. 1. You have to find the maximum charge on your rifle 2. back off one grain 3. fine tune the load (with seating depth) To do that you have to do the following 1. find where is your land and go 10 thou in land with bullet 2. reload in increment of 0.5gr from 69 to 72gr (69, 69.5, 70, 70.5, 71, etc) 3. reload just one round for each increment 4. go at 200-300 yards and aiming at the same point shoot every round STARTING FROM 69 - and go up to 72 5. PAY ATTENTION TO FIRST SIGN OF PRESSURE (hard lifting the bold, hard extraction of the brass out of chamber, primer flattened) and STOP RIGHT THERE. 6. lets say you got the first pressure signs at 71.5, then back off one grain at 70.5) 7. 71.5 IS YOUR MAXIMUM CHARGE - FOR YOUR RIFLE (not your buddy rifle or the rifle of powder company) 8. ALWAYS AND ALWAYS YOU HAVE TO FIND WHAT IS YOUR MAX POWDER CHARGE FOR YOUR RIFLE 9. go home and reload 70.5 - 5 rounds 10. test the group 11. for fine tuning - keep everything the same and just play with seating depth in increment of 3 thou. until your group is tight enough for your application. 12. mark the load on the book and that is your load for using 168VLD with H1000 14. it is very important to redo the above if your batch of powder is different. Keep in mind you can get big variation on pressure just having different batch of powder. If you look on the 1 lb bottle you will find the #0000 number (this is the batch number) Make sure all are the same. If you have different numbers (just mix all the batches together ) to uniform them and then do the load testing. YOU CAN INJURE YOURSELF... if you don't follow the above. Safety first. As you noticed you are loading with 1-2 gr more then the book advised. Don;t worry. At first sign of pressure stop and back off one grain... [/QUOTE]
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