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Rifles, Reloading, Optics, Equipment
Reloading
338 lapua/300 gr bullets/2800 fps minimum?
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<blockquote data-quote="longrangehunterII" data-source="post: 1066799" data-attributes="member: 61185"><p>Your pointing out a few things that have nothing to do with why two different guns using the same bullet yet one "needs more gun powder and has a longer barrel" to achieve the same drop. </p><p></p><p>Pressure is just that, which is what pushes the bullet down the barrel. One barrel may require "X" amount of powder to achieve "Y'' velocity, which is why when hand loading always work up a load. Barrels can vary from tight, meaning they will require less powder to achieve the expected velocity, or slick, which will require more powder to achieve the same velocity of a given load. Which is why when developing a load you should stay within the "expected velocity range" for a given bullet in a given cartridge plus or minus the difference in barrel length for the barrel used in the reloading manual.</p><p></p><p>Another being the distance a bullet is off the lands- velocity is what the bullet is traveling regardless if jammed or .050" off the lands has nothing to do with your answer.</p><p></p><p>I'm only telling you this so you'll better understand pressure, which is nothing more then the cause and effect that develops velocity. In hand loading there are no free lunch, a case by its design is to achieve a given velocity for a given bullet in a given barrel length...... you'll notice that your rifle is achieving the expected velocity in the Berger Manual! Albeit needing more powder to obtain that velocity, which is why I said the TRG's Chrome lined barrels are slow, meaning they require more powder to achieve the same velocity-pressure. The barrel used in the Berger manual is 26", the extra 1 1/4" would put your load right about were it should be for that bullet.</p><p></p><p>It very well could be the scopes you're using but most NF scopes all dial the correct elevation gain but over that distance, the variance could add up to the differences in the field you're seeing. But to my observation, I had bet your friends load wasn't traveling 2800 simple based on the bullet drop. </p><p></p><p>I think you'll find your answer to your question when you both chronograph your loads, and check the tracking.</p><p></p><p>Good luck and let us know what you find out. Bryan is a super sharp guy, why didn't you share with us what he said? I'm curious as to what he had to say simple because none of the loads they have listed come close to 2800 fps even if you take into account the extra 2" of barrel length you'll get to about 2680 fps using H1000, and that a 300 grain bullet from the 338 Lapua should be traveling 2800 fps Minimum! Oh, but that no free lunch I talked about....... is the extra powder burned to achieve a higher velocity. Basically the load is developing a higher pressure to achieve that velocity gain.</p></blockquote><p></p>
[QUOTE="longrangehunterII, post: 1066799, member: 61185"] Your pointing out a few things that have nothing to do with why two different guns using the same bullet yet one "needs more gun powder and has a longer barrel" to achieve the same drop. Pressure is just that, which is what pushes the bullet down the barrel. One barrel may require "X" amount of powder to achieve "Y'' velocity, which is why when hand loading always work up a load. Barrels can vary from tight, meaning they will require less powder to achieve the expected velocity, or slick, which will require more powder to achieve the same velocity of a given load. Which is why when developing a load you should stay within the "expected velocity range" for a given bullet in a given cartridge plus or minus the difference in barrel length for the barrel used in the reloading manual. Another being the distance a bullet is off the lands- velocity is what the bullet is traveling regardless if jammed or .050" off the lands has nothing to do with your answer. I'm only telling you this so you'll better understand pressure, which is nothing more then the cause and effect that develops velocity. In hand loading there are no free lunch, a case by its design is to achieve a given velocity for a given bullet in a given barrel length...... you'll notice that your rifle is achieving the expected velocity in the Berger Manual! Albeit needing more powder to obtain that velocity, which is why I said the TRG's Chrome lined barrels are slow, meaning they require more powder to achieve the same velocity-pressure. The barrel used in the Berger manual is 26", the extra 1 1/4" would put your load right about were it should be for that bullet. It very well could be the scopes you're using but most NF scopes all dial the correct elevation gain but over that distance, the variance could add up to the differences in the field you're seeing. But to my observation, I had bet your friends load wasn't traveling 2800 simple based on the bullet drop. I think you'll find your answer to your question when you both chronograph your loads, and check the tracking. Good luck and let us know what you find out. Bryan is a super sharp guy, why didn't you share with us what he said? I'm curious as to what he had to say simple because none of the loads they have listed come close to 2800 fps even if you take into account the extra 2" of barrel length you'll get to about 2680 fps using H1000, and that a 300 grain bullet from the 338 Lapua should be traveling 2800 fps Minimum! Oh, but that no free lunch I talked about....... is the extra powder burned to achieve a higher velocity. Basically the load is developing a higher pressure to achieve that velocity gain. [/QUOTE]
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338 lapua/300 gr bullets/2800 fps minimum?
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