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Rifles, Reloading, Optics, Equipment
Reloading
Help with 300RUM 215 Berger and ES
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<blockquote data-quote="barefooter56" data-source="post: 1128278" data-attributes="member: 85389"><p>Vulture.</p><p>I suggest that with our 215 Hybrid you start at .005 off the lands and work back in in .005 increments. You want to do all your seating depth testing at the lowest powder charge listed for the bullet/powder/cartridge combination you are testing. Once you have found your seating depth accuracy node. Work you load back up in half grain increments until you get to 2 grains below maximum then drop to 1/2 grain increments. All the while you will be checking for pressure signs and accuracy. The rifle will show you these accuracy nodes on the target. When you are doing your velocity testing you can do it through your chronograph to kill two birds with one stone. A low STANDARD DEVIATION (SD) is what you want ( 10 or less). SD is the indicator that affects vertical dispersion. Low SD = less vertical = makes the target bigger. Horizontal = wind , shots out at an angle from the group like at 1, 4 7 and 11 on the clock face is the shooter. In regards to your scales . You need to get a set of the RCBS Check Weights. These are NOT like the weights that came with your Chargemaster unit. Those are calibration weights. The check weights are in grains to represent powder charges in short, if you have a 45 grain load you put the check weights that add up to 45 grains in the scale pan to check the 45 grain setting of the scale is accurate. If the beam scale is set up accuratly using this method you can use it to check the Chargemaster. Keep a good reloading log book and as J E Custom said above "CHANGE ONLY ONE THING AT A TIME AND TEST". If time is short and you already have a load for that rifle that works I would suggest you use it now and do the lod testing when you have time for it so you arent so stressed and rushed for this season.</p></blockquote><p></p>
[QUOTE="barefooter56, post: 1128278, member: 85389"] Vulture. I suggest that with our 215 Hybrid you start at .005 off the lands and work back in in .005 increments. You want to do all your seating depth testing at the lowest powder charge listed for the bullet/powder/cartridge combination you are testing. Once you have found your seating depth accuracy node. Work you load back up in half grain increments until you get to 2 grains below maximum then drop to 1/2 grain increments. All the while you will be checking for pressure signs and accuracy. The rifle will show you these accuracy nodes on the target. When you are doing your velocity testing you can do it through your chronograph to kill two birds with one stone. A low STANDARD DEVIATION (SD) is what you want ( 10 or less). SD is the indicator that affects vertical dispersion. Low SD = less vertical = makes the target bigger. Horizontal = wind , shots out at an angle from the group like at 1, 4 7 and 11 on the clock face is the shooter. In regards to your scales . You need to get a set of the RCBS Check Weights. These are NOT like the weights that came with your Chargemaster unit. Those are calibration weights. The check weights are in grains to represent powder charges in short, if you have a 45 grain load you put the check weights that add up to 45 grains in the scale pan to check the 45 grain setting of the scale is accurate. If the beam scale is set up accuratly using this method you can use it to check the Chargemaster. Keep a good reloading log book and as J E Custom said above "CHANGE ONLY ONE THING AT A TIME AND TEST". If time is short and you already have a load for that rifle that works I would suggest you use it now and do the lod testing when you have time for it so you arent so stressed and rushed for this season. [/QUOTE]
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Reloading
Help with 300RUM 215 Berger and ES
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