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Rifles, Reloading, Optics, Equipment
Reloading
Starting with new brass
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<blockquote data-quote="Lonewolf74" data-source="post: 1426136" data-attributes="member: 96274"><p>Hear is how I would go about it and my theories. </p><p></p><p>I would prep and size 30 cases, I'm going to use these 30 cases for my load development. Most likely in sizing your just touching and uniforming the necks. Then chamfer, debur and uniform primer pocket.</p><p></p><p>Then I would pick a lower charge weight of the powder you have chosen and do a seating depth test. Load 5 rounds starting at touching lands and back off in .020 increments to .080 off lands (touching lands, .020 off, .040 off ect). Pick the depth that shot best and load up 5 more at that same depth and charge and verify it shoots decent or as good as the first time.</p><p></p><p>The theory is your seating depth sweet spot should remain constant throughout besides a few thous tweak hear or there later on.</p><p></p><p>I would chrono these shots to see what my ES is hear, if it's poor I would switch powder or primer and start again. If your powder primer combo is good ES should be decent at any charge, it won't go from bad to good by finding a node but if it's good to start with it will get better once in a node.</p><p></p><p>Next take these 30 once fired cases and load however many up for a ladder test to find your powder node. I like to load 2 in .3 or .5 gr increments to 1.5 grains over book max. Of course look carefully for pressure signs and stop shooting once you see them. I shoot at the same spot for every shot at 350 yrds and mark every shot. I like to do 2 shots of each charge to rule out something being a fluke or if I pull a shot. I want to see 2-3 consecutive charge weights with very little vertical stringing hear (ideally a 4-6 shot cluster) and hope the chrono agrees with the paper that there is a velocity flat spot hear. However if using an optical chrono I trust the paper over the chrono.</p><p></p><p>Then I would load 3-5 with the once fired brass to verify I have a good group and low ES at this charge.</p><p></p><p>If things verify alright I would tweak seating depth to see if groups tighten by going 2 .003 steps in each direction. Say. 020 off shot the best in your initial test I would load at .014, .017, .020, .023, .026 off. 3 of each using your once or twice fired brass. Whichever one of these shoots best is my load and probably as dialed as I'm able to get it.</p><p></p><p>This is my load for this rifle but keep in mind you may have to tweak it once there is 100-150 rounds through the barrel. You can shoot another ladder test to find the node again or just tweak your charge to find the same velocity you had before the barrel sped up. </p><p></p><p>Also at this point I would load up 5 at the load you just found in the virgin brass and see how it shoots against the fire formed brass. Chances are it'll shoot great, but for some reason it don't seem to work the other way around (using virgin brass to find a load then use it in fired brass).</p><p></p><p>Good luck.</p></blockquote><p></p>
[QUOTE="Lonewolf74, post: 1426136, member: 96274"] Hear is how I would go about it and my theories. I would prep and size 30 cases, I'm going to use these 30 cases for my load development. Most likely in sizing your just touching and uniforming the necks. Then chamfer, debur and uniform primer pocket. Then I would pick a lower charge weight of the powder you have chosen and do a seating depth test. Load 5 rounds starting at touching lands and back off in .020 increments to .080 off lands (touching lands, .020 off, .040 off ect). Pick the depth that shot best and load up 5 more at that same depth and charge and verify it shoots decent or as good as the first time. The theory is your seating depth sweet spot should remain constant throughout besides a few thous tweak hear or there later on. I would chrono these shots to see what my ES is hear, if it's poor I would switch powder or primer and start again. If your powder primer combo is good ES should be decent at any charge, it won't go from bad to good by finding a node but if it's good to start with it will get better once in a node. Next take these 30 once fired cases and load however many up for a ladder test to find your powder node. I like to load 2 in .3 or .5 gr increments to 1.5 grains over book max. Of course look carefully for pressure signs and stop shooting once you see them. I shoot at the same spot for every shot at 350 yrds and mark every shot. I like to do 2 shots of each charge to rule out something being a fluke or if I pull a shot. I want to see 2-3 consecutive charge weights with very little vertical stringing hear (ideally a 4-6 shot cluster) and hope the chrono agrees with the paper that there is a velocity flat spot hear. However if using an optical chrono I trust the paper over the chrono. Then I would load 3-5 with the once fired brass to verify I have a good group and low ES at this charge. If things verify alright I would tweak seating depth to see if groups tighten by going 2 .003 steps in each direction. Say. 020 off shot the best in your initial test I would load at .014, .017, .020, .023, .026 off. 3 of each using your once or twice fired brass. Whichever one of these shoots best is my load and probably as dialed as I'm able to get it. This is my load for this rifle but keep in mind you may have to tweak it once there is 100-150 rounds through the barrel. You can shoot another ladder test to find the node again or just tweak your charge to find the same velocity you had before the barrel sped up. Also at this point I would load up 5 at the load you just found in the virgin brass and see how it shoots against the fire formed brass. Chances are it'll shoot great, but for some reason it don't seem to work the other way around (using virgin brass to find a load then use it in fired brass). Good luck. [/QUOTE]
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