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<blockquote data-quote="Mikecr" data-source="post: 2450111" data-attributes="member: 1521"><p>Just keep in mind folks, you can't 'adjust' anything with reloading manuals.</p><p></p><p>I would not fiddle with weighting factor until you have a fair basis for doing so.</p><p>But if you're more towards an extreme in cartridge design either long/skinny or short/fat, underbore or overbore, that's when weighting factor finalizes calibration. For instance, I need WF at 0.4-0.45 for WSSMs, which are very efficient. </p><p>0.48-0.5 is likely good for a 22-250.</p><p>A 300rum or 30-06 would likely be up at 0.65-0.7, both sending a big slug of powder down the bore, adding to mass of the bullet, and people don't often have long enough barrels for big boomers to improve on this.</p><p></p><p>A peeve of mine about QL data has been the myriad of cross-sectional bore areas.</p><p>I know that test barrels come in every imaginable form, but some loaded in QL are flat out useless for us (much like their unicorn powders).</p><p>For any cal, I suggest you load in different cartridges for cal and note the cross-sectional bore area range. Pick a cartridge at peak of bell curve to begin. Don't be concerned that it's not YOUR cartridge. You can adapt any with H20 capacity and weighting factor.</p><p>Then, you can later tweak that bore area to cal.</p><p></p><p>A golden rule with QL is do not adjust anything you're not actually measuring -a lot (just a little each).</p><p>You need a good chronograph, and attention to detail for inputs.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 2450111, member: 1521"] Just keep in mind folks, you can't 'adjust' anything with reloading manuals. I would not fiddle with weighting factor until you have a fair basis for doing so. But if you're more towards an extreme in cartridge design either long/skinny or short/fat, underbore or overbore, that's when weighting factor finalizes calibration. For instance, I need WF at 0.4-0.45 for WSSMs, which are very efficient. 0.48-0.5 is likely good for a 22-250. A 300rum or 30-06 would likely be up at 0.65-0.7, both sending a big slug of powder down the bore, adding to mass of the bullet, and people don't often have long enough barrels for big boomers to improve on this. A peeve of mine about QL data has been the myriad of cross-sectional bore areas. I know that test barrels come in every imaginable form, but some loaded in QL are flat out useless for us (much like their unicorn powders). For any cal, I suggest you load in different cartridges for cal and note the cross-sectional bore area range. Pick a cartridge at peak of bell curve to begin. Don't be concerned that it's not YOUR cartridge. You can adapt any with H20 capacity and weighting factor. Then, you can later tweak that bore area to cal. A golden rule with QL is do not adjust anything you're not actually measuring -a lot (just a little each). You need a good chronograph, and attention to detail for inputs. [/QUOTE]
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