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Rifles, Reloading, Optics, Equipment
Reloading
Pressure signs not showing at Max load
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<blockquote data-quote="Clem Bronkoski" data-source="post: 1692202" data-attributes="member: 110518"><p>Here is what I would do in your instance. Load all the following rounds .010" off the lands. Then:</p><p>1. Load 2 or 3 rounds with the following charges of H4350 and your 142 gr AB (your preferred bullet and powder) Charges 38.0, 38.8, 39.6 gr. These will be your sight in shots. Note, the extras will be so you can group around your point of aim with these 3 charges.</p><p>2. Now, load 3 rounds each of the following charges: 38.3, 38.6, 38.9, 39.2, 39.5, 39.8 40.1, 40.4, 40.8, and 41.1 (your last charge should be one step above your max listed charge.) Note: Its a good idea to write the charge weight on the case. You never know. You may drop your bullet box and you have a mess of different charges scattered on the ground.</p><p>3. Set up 10 target dots plus your sight in dot. Shoot your sight in shots (one of each charge from #1 above), adjust your scope as necessary and confirm with another group.</p><p>4. Now shoot a round of charge 1 at target #1, one round of charge 2 at target #2 until you have fired one shot of each charge at each target.</p><p>5. Allow the barrel to cool and reverse the round robin shooting starting by shooting charge 10 at target #10 and working your way back to target #1 with charge 1.</p><p>6. Then start again at target #1 after a cool down.</p><p>EDIT: I forgot to add - CHECK EACH CASE AFTER FIRING FOR EXCESSIVE PRESSURE.</p><p>You will notice that the center of your groups will drift off your point of aim and then begin to work back to it. DO NOT WORRY ABOUT GROUP SIZE.</p><p>Record the distance from the center of your group to the center of your aim point. The 3 groups closest to your aim point will be your optimum charge weight. So you will load in the center of this range. This will give you the most stable load. With your combination of bullet and powder, the load is the most heat and pressure stabilized because the bullet is leaving the barrel when the reverberating barrel harmonic (shock wave) is back at the chamber and your barrel is at its most stable point.</p><p>Your group size can now almost surely be reduced by adjusting your OAL in .005"-.010" increments.</p><p>I hope this helps. If anyone else has anything to add please do so.</p></blockquote><p></p>
[QUOTE="Clem Bronkoski, post: 1692202, member: 110518"] Here is what I would do in your instance. Load all the following rounds .010" off the lands. Then: 1. Load 2 or 3 rounds with the following charges of H4350 and your 142 gr AB (your preferred bullet and powder) Charges 38.0, 38.8, 39.6 gr. These will be your sight in shots. Note, the extras will be so you can group around your point of aim with these 3 charges. 2. Now, load 3 rounds each of the following charges: 38.3, 38.6, 38.9, 39.2, 39.5, 39.8 40.1, 40.4, 40.8, and 41.1 (your last charge should be one step above your max listed charge.) Note: Its a good idea to write the charge weight on the case. You never know. You may drop your bullet box and you have a mess of different charges scattered on the ground. 3. Set up 10 target dots plus your sight in dot. Shoot your sight in shots (one of each charge from #1 above), adjust your scope as necessary and confirm with another group. 4. Now shoot a round of charge 1 at target #1, one round of charge 2 at target #2 until you have fired one shot of each charge at each target. 5. Allow the barrel to cool and reverse the round robin shooting starting by shooting charge 10 at target #10 and working your way back to target #1 with charge 1. 6. Then start again at target #1 after a cool down. EDIT: I forgot to add - CHECK EACH CASE AFTER FIRING FOR EXCESSIVE PRESSURE. You will notice that the center of your groups will drift off your point of aim and then begin to work back to it. DO NOT WORRY ABOUT GROUP SIZE. Record the distance from the center of your group to the center of your aim point. The 3 groups closest to your aim point will be your optimum charge weight. So you will load in the center of this range. This will give you the most stable load. With your combination of bullet and powder, the load is the most heat and pressure stabilized because the bullet is leaving the barrel when the reverberating barrel harmonic (shock wave) is back at the chamber and your barrel is at its most stable point. Your group size can now almost surely be reduced by adjusting your OAL in .005"-.010" increments. I hope this helps. If anyone else has anything to add please do so. [/QUOTE]
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Pressure signs not showing at Max load
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