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Long Range Hunting & Shooting
200 yd group
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<blockquote data-quote="brant89" data-source="post: 1082603" data-attributes="member: 49553"><p>My typical load development process goes like this.</p><p></p><p>1. Find COAL where bullet touches lands using the Sharpie marker method then seat bullets 20 thou off lands for AMAX's or load a round robin test for VLD's to determine optimum seating depth.</p><p></p><p>2. Load one cartridge at starting load and fire, look for pressure signs, and continue incrementally until I find max load for my rifle. This is a good opportunity to zero the rifle. </p><p></p><p>3. Chronograph max load to determine if that particular powder produces acceptable velocities. It doesn't have to be the fastest load out there but if you can't get a 260 to push a 140 past 2650fps then a different powder is in order. (Got burned on an 8lb keg of IMR4831 before I employed this step).</p><p></p><p>4. Load ladder test in increments of 1-2% of case capacity, along with 6-10 rounds somewhere in the middle for sighters and to ensure that I am consistent behind the trigger before I shoot the ladder. I then mark each bullet ogive with different colored Sharpie so I can identify each shot later. I find red, green, blue, and yellow to work best and four colors allows you to mark up to 10 different loads. A Qtip with rubbing alcohol makes it very easy to identify the colors later.</p><p></p><p>5. Shoot ladder test at no less than 450yd (600yd is preferred). I like to use old furnace and water heater boxes from my parents plumbing and heating business to ensure all rounds will land on the target. I also dial 1MOA left or right of the aiming point to ensure that none of them land in the bullseye because that can make it difficult to see the different colors from the bullet. I also like my aiming point to be no greater than 1/2MOA.</p><p></p><p>6. Analyze test results for least amount of vertical spread. This should produce a load with very small ES. </p><p></p><p>7. Load 10 rounds at optimum charge and shoot for grouping at extended range verify load consistency. I like to do this at 600yd or more. </p><p></p><p>Others results may vary but this is what my trial and error has proven to work for me. Please feel free to chime in, always open to suggestions. BTW, I'd like to thank everyone here for all their posts because nearly all my knowledge is a result of hours of searching on this site. It is a great resource, especially for those who do not have any LR shooting mentors to show them the ropes.</p></blockquote><p></p>
[QUOTE="brant89, post: 1082603, member: 49553"] My typical load development process goes like this. 1. Find COAL where bullet touches lands using the Sharpie marker method then seat bullets 20 thou off lands for AMAX's or load a round robin test for VLD's to determine optimum seating depth. 2. Load one cartridge at starting load and fire, look for pressure signs, and continue incrementally until I find max load for my rifle. This is a good opportunity to zero the rifle. 3. Chronograph max load to determine if that particular powder produces acceptable velocities. It doesn't have to be the fastest load out there but if you can't get a 260 to push a 140 past 2650fps then a different powder is in order. (Got burned on an 8lb keg of IMR4831 before I employed this step). 4. Load ladder test in increments of 1-2% of case capacity, along with 6-10 rounds somewhere in the middle for sighters and to ensure that I am consistent behind the trigger before I shoot the ladder. I then mark each bullet ogive with different colored Sharpie so I can identify each shot later. I find red, green, blue, and yellow to work best and four colors allows you to mark up to 10 different loads. A Qtip with rubbing alcohol makes it very easy to identify the colors later. 5. Shoot ladder test at no less than 450yd (600yd is preferred). I like to use old furnace and water heater boxes from my parents plumbing and heating business to ensure all rounds will land on the target. I also dial 1MOA left or right of the aiming point to ensure that none of them land in the bullseye because that can make it difficult to see the different colors from the bullet. I also like my aiming point to be no greater than 1/2MOA. 6. Analyze test results for least amount of vertical spread. This should produce a load with very small ES. 7. Load 10 rounds at optimum charge and shoot for grouping at extended range verify load consistency. I like to do this at 600yd or more. Others results may vary but this is what my trial and error has proven to work for me. Please feel free to chime in, always open to suggestions. BTW, I'd like to thank everyone here for all their posts because nearly all my knowledge is a result of hours of searching on this site. It is a great resource, especially for those who do not have any LR shooting mentors to show them the ropes. [/QUOTE]
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