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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ballistics beyond 2000 yds : do we need/trust them?
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<blockquote data-quote="CatShooter" data-source="post: 138872" data-attributes="member: 7"><p>[ QUOTE ]</p><p>Since no two primers are "exactly" the same and once the barrel is fouled, pressures are not exactly the same on each shot. Each powder charge is going to be different due to some powder granules having different geometry. Brass cases will have different neck tensions. The barrel will wear with each shot. As temperature climbs, pressure will change etc, etc. James </p><p></p><p>[/ QUOTE ]</p><p></p><p>James...</p><p></p><p>With all these variables that change from shot to shot, how do we manage to hit anything?</p><p></p><p>The current 1000 yard BR record is around 1.7" for 10 shots. How did he manage to keep ten shots in that little group when the barrel wore out a little after each shot, the temperature changed after each shot, the fouling changed after each shot, the friction changed after each shot?</p><p></p><p>By God, it's a flaming miracle that we can hit our feet.</p><p></p><p>An interesting read is the following. It relates the state of the shooting art THIRTY YEARS AGO. These guys got access to a concrete warehouse and set up to shoot inside of it.</p><p></p><p>Please note that their groups were repeatedly in the 0.035" (three point five hundredths of an inch ctc !!) at 100yds.</p><p>LARGE groups were 0.05".</p><p></p><p>And they did it over and over and over...</p><p></p><p>When we "sweat" all the minutia like fouling between shots, it takes us away from the real issues of long range shooting. These discussions are just smoke.</p><p></p><p>It's like high school kids arguing about whether a Porsche can out corner a Corvett, and none of them have a driver's license.</p><p></p><p><a href="http://www.angelfire.com/ma3/max357/houston.html" target="_blank">http://www.angelfire.com/ma3/max357/houston.html</a></p><p> </p><p>It's a good read - and might get you focused on the important things.</p></blockquote><p></p>
[QUOTE="CatShooter, post: 138872, member: 7"] [ QUOTE ] Since no two primers are "exactly" the same and once the barrel is fouled, pressures are not exactly the same on each shot. Each powder charge is going to be different due to some powder granules having different geometry. Brass cases will have different neck tensions. The barrel will wear with each shot. As temperature climbs, pressure will change etc, etc. James [/ QUOTE ] James... With all these variables that change from shot to shot, how do we manage to hit anything? The current 1000 yard BR record is around 1.7" for 10 shots. How did he manage to keep ten shots in that little group when the barrel wore out a little after each shot, the temperature changed after each shot, the fouling changed after each shot, the friction changed after each shot? By God, it's a flaming miracle that we can hit our feet. An interesting read is the following. It relates the state of the shooting art THIRTY YEARS AGO. These guys got access to a concrete warehouse and set up to shoot inside of it. Please note that their groups were repeatedly in the 0.035" (three point five hundredths of an inch ctc !!) at 100yds. LARGE groups were 0.05". And they did it over and over and over... When we "sweat" all the minutia like fouling between shots, it takes us away from the real issues of long range shooting. These discussions are just smoke. It's like high school kids arguing about whether a Porsche can out corner a Corvett, and none of them have a driver's license. [url="http://www.angelfire.com/ma3/max357/houston.html"]http://www.angelfire.com/ma3/max357/houston.html[/url] It's a good read - and might get you focused on the important things. [/QUOTE]
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Ballistics beyond 2000 yds : do we need/trust them?
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