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Long Range Hunting & Shooting
First shot out of wet barrel
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<blockquote data-quote="Darryl Cassel" data-source="post: 351" data-attributes="member: 34"><p>Hello PC</p><p></p><p>To clear that up a bit, most centerfire rifle bullets will have reduced velocity coming out of a wet oiled barrel for the first shot or two. Thats why you will see the bullet impact LOWER down range.</p><p>Just because a bullet SLIDES out of a barrel easier because of less friction doesn't mean the velocity is increased. It only means it started it's trip down the tube at the first sign of pressure from the START of the powder beginning it's burn. The bullet was not held back enough to obsorb all the pressure from the powder burn that creates velocity. </p><p></p><p>The cronagraph is very helpful in this senario.</p><p></p><p>AS the fouling takes place and the friction is applied to the bullet from non oiled lands and grooves the increased load pressure will cause the velocity to increase and your bullet impact will be higher and shoot flatter down range. Hence, an increase in OVERALL bullet velocity on the path to the target.</p><p></p><p>On another note;</p><p></p><p>I believe I read where you were working on a GPS rangefinder system.</p><p>Am I correct in my asumption that, you must take a reading from the shooting position and another reading at the target area you intend on shoot to.</p><p>If this is true, would you not have to take readings in several places on THAT mountain to know the yardage in case an elk or deer showed up somewhere in the area you plotted?</p><p></p><p>I don't believe this would work unless you hunted the SAME mountain all the time and had plotted it in advance. If you went to a new place, you would have to plot the whole new area again.</p><p>Maybe I'm confused or did I miss something? .</p><p>The GPS I have used gave a reading as to where you are and can get you back to where you started by reversing the coordinents.</p><p></p><p>I never thought of it as a rangefinder because we need to be able to range the animal in a matter of seconds or a minute or two at the most. Normally the animal is moving slowly and we need to get the range and set up on him as soon as possible.</p><p>The military lasers we use are excellent and very accurate for this.</p><p> </p><p>Will the GPS work in this instance?</p><p> </p><p>Darryl Cassel</p></blockquote><p></p>
[QUOTE="Darryl Cassel, post: 351, member: 34"] Hello PC To clear that up a bit, most centerfire rifle bullets will have reduced velocity coming out of a wet oiled barrel for the first shot or two. Thats why you will see the bullet impact LOWER down range. Just because a bullet SLIDES out of a barrel easier because of less friction doesn't mean the velocity is increased. It only means it started it's trip down the tube at the first sign of pressure from the START of the powder beginning it's burn. The bullet was not held back enough to obsorb all the pressure from the powder burn that creates velocity. The cronagraph is very helpful in this senario. AS the fouling takes place and the friction is applied to the bullet from non oiled lands and grooves the increased load pressure will cause the velocity to increase and your bullet impact will be higher and shoot flatter down range. Hence, an increase in OVERALL bullet velocity on the path to the target. On another note; I believe I read where you were working on a GPS rangefinder system. Am I correct in my asumption that, you must take a reading from the shooting position and another reading at the target area you intend on shoot to. If this is true, would you not have to take readings in several places on THAT mountain to know the yardage in case an elk or deer showed up somewhere in the area you plotted? I don't believe this would work unless you hunted the SAME mountain all the time and had plotted it in advance. If you went to a new place, you would have to plot the whole new area again. Maybe I'm confused or did I miss something? . The GPS I have used gave a reading as to where you are and can get you back to where you started by reversing the coordinents. I never thought of it as a rangefinder because we need to be able to range the animal in a matter of seconds or a minute or two at the most. Normally the animal is moving slowly and we need to get the range and set up on him as soon as possible. The military lasers we use are excellent and very accurate for this. Will the GPS work in this instance? Darryl Cassel [/QUOTE]
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First shot out of wet barrel
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