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TAC 15/15i Basic Unpublished Information
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<blockquote data-quote="Konrad" data-source="post: 492158" data-attributes="member: 26549"><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">Hello Everyone,</span></span></p><p> </p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">For all intents and purposes that list is indeed straight from a precesion gun makers "to do" list for accuracy.</span></span></p><p> </p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">I liken center shot to verification of chamber axis to throat/barrel bore axis and squaring of the bolt face to same.</span></span></p><p> </p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">No precesion rifle marksman ever succeeded using poorly balanced or unmatched weight projectiles. "Center of Balance" fore and aft is a large part of bullet stabilization along with jacket concentricity. Bullet base squareness produces evenly applied gas pressures to the bottom of the bullet as it exits the barrel in the same way squared nock ends of an arrow distribute the driving force of the string evenly to the shaft. Weight variables affect time of flight (velocities) and as such produce vertical stringing issues. Thankfully, most custom bullet manufacturers have eliminated those issues all together.</span></span></p><p> </p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">Fletching type and twist are exactly the same as matching the rate of rifling twist to velocity and projectile weight. </span></span></p><p> </p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">Limb to riser to human fit is the same as barreled action to stock to human fit. A poorly bedded action will never "settle" into the stock. The microscopic movements between the two components affect force distribution differently with each shot. A poorly fitting stock promotes shooter error because he is constantly trying to compensate for the poor fit as consequently never gets the shooting platform into the exact same position before firing the next shot. Once again, inconsistent distribution of recoil forces negatively affects point of impact and group size.</span></span></p><p> </p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">Poor optics and/or poorly mounted optics are a subject on its own. Much has been written and the fact remains that if the internal mechanism shifts between shots or the mating between the optical device, the mount and the shooting platform changes, point of impact changes.</span></span></p><p> </p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">And then we come to triggers…</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">Even were all of the above perfect, a horrible trigger pull will destroy accuracy potential. Dragging a harsh, heavy sear across an engagement face disturbs even the best aiming concentration and position. An excessively long trigger over-travel allows for platform disturbance after primer ignition but before the projectile leaves the barrel.</span></span></p><p> </p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">The first time I dabbled in custom "tuning" was when I began weighing stones for my Wrist Rocket on Mom's kitchen scale. </span></span></p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">But that is a story for a different day.</span></span></p><p> </p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">In short (he said as he rambled on), I stand guilty as charged in "borrowing" from my firearms experiences.</span></span></p><p> </p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">I eagerly await the upcoming testing reports.</span></span></p><p></p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">Thanks for all of the kind words,</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">Konrad</span></span></p></blockquote><p></p>
[QUOTE="Konrad, post: 492158, member: 26549"] [FONT=Times New Roman][SIZE=3]Hello Everyone,[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]For all intents and purposes that list is indeed straight from a precesion gun makers “to do” list for accuracy.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]I liken center shot to verification of chamber axis to throat/barrel bore axis and squaring of the bolt face to same.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]No precesion rifle marksman ever succeeded using poorly balanced or unmatched weight projectiles. “Center of Balance” fore and aft is a large part of bullet stabilization along with jacket concentricity. Bullet base squareness produces evenly applied gas pressures to the bottom of the bullet as it exits the barrel in the same way squared nock ends of an arrow distribute the driving force of the string evenly to the shaft. Weight variables affect time of flight (velocities) and as such produce vertical stringing issues. Thankfully, most custom bullet manufacturers have eliminated those issues all together.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]Fletching type and twist are exactly the same as matching the rate of rifling twist to velocity and projectile weight. [/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]Limb to riser to human fit is the same as barreled action to stock to human fit. A poorly bedded action will never “settle” into the stock. The microscopic movements between the two components affect force distribution differently with each shot. A poorly fitting stock promotes shooter error because he is constantly trying to compensate for the poor fit as consequently never gets the shooting platform into the exact same position before firing the next shot. Once again, inconsistent distribution of recoil forces negatively affects point of impact and group size.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]Poor optics and/or poorly mounted optics are a subject on its own. Much has been written and the fact remains that if the internal mechanism shifts between shots or the mating between the optical device, the mount and the shooting platform changes, point of impact changes.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]And then we come to triggers…[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]Even were all of the above perfect, a horrible trigger pull will destroy accuracy potential. Dragging a harsh, heavy sear across an engagement face disturbs even the best aiming concentration and position. An excessively long trigger over-travel allows for platform disturbance after primer ignition but before the projectile leaves the barrel.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]The first time I dabbled in custom “tuning” was when I began weighing stones for my Wrist Rocket on Mom’s kitchen scale. [/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]But that is a story for a different day.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]In short (he said as he rambled on), I stand guilty as charged in “borrowing” from my firearms experiences.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]I eagerly await the upcoming testing reports.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]Thanks for all of the kind words,[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]Konrad[/SIZE][/FONT] [/QUOTE]
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