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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
QuickLOAD way off from reality. Solutions?
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<blockquote data-quote="Tripodmvr7" data-source="post: 2443178" data-attributes="member: 115545"><p>Essentials :-</p><p></p><p>1. Select calibre and bullet type. Change bullet length if different from actual measured.</p><p>2. Change barrel length to measured from cocked bolt to muzzle tip (ignore muzzle brakes)</p><p>3. Measure case capacity and enter.</p><p>4. Enter COL as used - from tip of bullet to base - this measurement is used to calculate case fill</p><p></p><p>Add charge used and speed obtained. Add about 10fps for chrony at 5m.</p><p></p><p>A. Change BRF (Ba) to get speed measured. Once done I save this info so as to use it in future.</p><p>B. Get a copy of an OBT excel calculator and input the barrel length.</p><p>C. Adjust the charge to obtain the same barrel time as that reflected in the OBT calculation.</p><p>D. Load this charge and same COL and test run three or more bullets to see grouping. Get speed again as check.</p><p>E. Refine around this charge that gives a good group. Move up and down with 0,2 or 0,1 increments.</p><p></p><p>As can be seen this is a fairly uncomplicated procedure. My tally stands at more than 1500 calcs that have been 95% successful.</p></blockquote><p></p>
[QUOTE="Tripodmvr7, post: 2443178, member: 115545"] Essentials :- 1. Select calibre and bullet type. Change bullet length if different from actual measured. 2. Change barrel length to measured from cocked bolt to muzzle tip (ignore muzzle brakes) 3. Measure case capacity and enter. 4. Enter COL as used - from tip of bullet to base - this measurement is used to calculate case fill Add charge used and speed obtained. Add about 10fps for chrony at 5m. A. Change BRF (Ba) to get speed measured. Once done I save this info so as to use it in future. B. Get a copy of an OBT excel calculator and input the barrel length. C. Adjust the charge to obtain the same barrel time as that reflected in the OBT calculation. D. Load this charge and same COL and test run three or more bullets to see grouping. Get speed again as check. E. Refine around this charge that gives a good group. Move up and down with 0,2 or 0,1 increments. As can be seen this is a fairly uncomplicated procedure. My tally stands at more than 1500 calcs that have been 95% successful. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
QuickLOAD way off from reality. Solutions?
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