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Rifles, Reloading, Optics, Equipment
Reloading
Forgiveness in reloading and what one is looking for to achieve that.
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<blockquote data-quote="MagnumManiac" data-source="post: 2252748" data-attributes="member: 10755"><p>Gave up on ladder testing eons ago.</p><p>OCW is what I do, whether it's at 100 or 600, the results show you how BIG your aggregate will be.</p><p>I run 5 shot groups, looking for the tightest group AFTER I have determined seating depth first.</p><p>This is the order of what is important for a load to work; Seating depth, powder, primer and load density all play a part in a load.</p><p>If I get the first 2 right, a primer swap can make or break a load…</p><p>People often 'settle' on a load without testing different seating depths or primers.</p><p>This is why some loads you think are good sway from day to day, they are only good in a certain temp or humidity window because the load isn't stable yet. If start pressure fluctuates, then the load will be erratic and even though on one day it shoots well, on others it will not. Sometimes just a primer swap will fix it, other times nothing will but a powder change.</p><p>My seating depth tests run from touch through to .100" of in rifles that allow touch in the first place. My 375 Weatherby has .500" of freebore, I have to run at mag length (3.6") but I can tune using primer and powder to get 1/3MoA accuracy with little effort because I understand that start pressure is more important for tuning than powder type.</p><p>Ball powders work the best for large almost straight walled cartridges like this. However, a powder like H4350 is also very forgiving and has a similar node but not the same velocity window, it is narrower by nature.</p><p>Anyway, a flat spot in a ladder does not mean that node will always be stable in all environments.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2252748, member: 10755"] Gave up on ladder testing eons ago. OCW is what I do, whether it’s at 100 or 600, the results show you how BIG your aggregate will be. I run 5 shot groups, looking for the tightest group AFTER I have determined seating depth first. This is the order of what is important for a load to work; Seating depth, powder, primer and load density all play a part in a load. If I get the first 2 right, a primer swap can make or break a load… People often ‘settle’ on a load without testing different seating depths or primers. This is why some loads you think are good sway from day to day, they are only good in a certain temp or humidity window because the load isn’t stable yet. If start pressure fluctuates, then the load will be erratic and even though on one day it shoots well, on others it will not. Sometimes just a primer swap will fix it, other times nothing will but a powder change. My seating depth tests run from touch through to .100” of in rifles that allow touch in the first place. My 375 Weatherby has .500” of freebore, I have to run at mag length (3.6”) but I can tune using primer and powder to get 1/3MoA accuracy with little effort because I understand that start pressure is more important for tuning than powder type. Ball powders work the best for large almost straight walled cartridges like this. However, a powder like H4350 is also very forgiving and has a similar node but not the same velocity window, it is narrower by nature. Anyway, a flat spot in a ladder does not mean that node will always be stable in all environments. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Forgiveness in reloading and what one is looking for to achieve that.
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