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Rifles, Reloading, Optics, Equipment
Reloading
Large difference between reloading Data?
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<blockquote data-quote="Bbear" data-source="post: 1090337" data-attributes="member: 7898"><p>Different manufacturers use different 'testing' procedures. Some fire all of the bullets with many different (and suitable) powders through a 'test' barrel. Others use actual factory made firearms. Barrel lengths differ from maker to maker. Then you add in the fact that some will use computer programs to give them the 'range' of loads that fit a specific caliber/cartridge/powder/primer combination. (Think of someone never having loaded a single cartridge starting out using nothing but QuickLoad. Then deciding they liked the looks of that whizz-bang speed that just happens to be a bit too much and go from there). </p><p></p><p>As Mikecr stated, they don't have any idea of YOUR specific firearm's dimensions. The books are guideline that only your personal testing will show what works in your rifle and doesn't. </p><p></p><p>I have too many times tried someone else's 'perfect' load in one my rifles and find them shooting patterns instead of groups. To the point if I don't load it myself, I don't shoot it. (especially after I was told by one acquaintance that he just poured the IMR4831 into a bowl and scooped the case full then seated the bullet). </p><p>And yes, I have had store-bought, factory ammo that was too hot to shoot. Last batch was some re-called factory 5.56 ammo that required the bolt to be replaced by the factory. </p><p></p><p>On top of all of this you have to toss in the lawyer angle. None of the people that put these out want to get sued and have hired lawyers to help stop that. That's brought us such wonderful inventions as the L-lock on Remington 700's, Narrowed powder charge ranges, reduced max loadings, trigger locks with every firearm and many others. </p><p></p><p>Looking at the Hodgden online info, I wouldn't start as low as 43. Though it MAY be safe, I'd feel more confident starting with the 48 gr starting load. You may also notice that the max load of 51.2 is only 3.2 grains more and you 'only' gain 140 fps in speed. You also gain nearly 9000 PSI pressure in that 3. 2 grains more powder. You might find an accurate load, but there are other powders that may do better. </p><p></p><p>One last thing, do NOT confuse IMR 4895 with H4895. They are TWO COMPLETELY DIFFERENT POWDERS. The starting load for H4895 is 43 grains! Check your books and make certain you aren't confusing the two.</p></blockquote><p></p>
[QUOTE="Bbear, post: 1090337, member: 7898"] Different manufacturers use different 'testing' procedures. Some fire all of the bullets with many different (and suitable) powders through a 'test' barrel. Others use actual factory made firearms. Barrel lengths differ from maker to maker. Then you add in the fact that some will use computer programs to give them the 'range' of loads that fit a specific caliber/cartridge/powder/primer combination. (Think of someone never having loaded a single cartridge starting out using nothing but QuickLoad. Then deciding they liked the looks of that whizz-bang speed that just happens to be a bit too much and go from there). As Mikecr stated, they don't have any idea of YOUR specific firearm's dimensions. The books are guideline that only your personal testing will show what works in your rifle and doesn't. I have too many times tried someone else's 'perfect' load in one my rifles and find them shooting patterns instead of groups. To the point if I don't load it myself, I don't shoot it. (especially after I was told by one acquaintance that he just poured the IMR4831 into a bowl and scooped the case full then seated the bullet). And yes, I have had store-bought, factory ammo that was too hot to shoot. Last batch was some re-called factory 5.56 ammo that required the bolt to be replaced by the factory. On top of all of this you have to toss in the lawyer angle. None of the people that put these out want to get sued and have hired lawyers to help stop that. That's brought us such wonderful inventions as the L-lock on Remington 700's, Narrowed powder charge ranges, reduced max loadings, trigger locks with every firearm and many others. Looking at the Hodgden online info, I wouldn't start as low as 43. Though it MAY be safe, I'd feel more confident starting with the 48 gr starting load. You may also notice that the max load of 51.2 is only 3.2 grains more and you 'only' gain 140 fps in speed. You also gain nearly 9000 PSI pressure in that 3. 2 grains more powder. You might find an accurate load, but there are other powders that may do better. One last thing, do NOT confuse IMR 4895 with H4895. They are TWO COMPLETELY DIFFERENT POWDERS. The starting load for H4895 is 43 grains! Check your books and make certain you aren't confusing the two. [/QUOTE]
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Reloading
Large difference between reloading Data?
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