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Long Range Hunting & Shooting
6MM ACKLEY OR 243 ACKLEY
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<blockquote data-quote="remington 1" data-source="post: 107581" data-attributes="member: 3869"><p>Wildcat, </p><p>Here are the specs of the rifle.. </p><p></p><p>243 Ackley (.272nk)</p><p>Remington 700 short action trued</p><p>28 inch hart tapered to .940 at the muzzle.</p><p>Hart muzzle break</p><p>Jewel 2oz trigger.</p><p>Shehane MBR "Sierra" Laminate Tracker (clear coated)</p><p>Kelby rings (polished)</p><p>Leupold Mark 4 M1 8.5-25x 50 </p><p></p><p>In the last two years, with the help of a friend of mine, I have been learning to smith my own rifles. This was the third one I built. It's just awesome to get behind one you put together yourself. </p><p></p><p>I began by chambering a donor 700 laminated 243 that I bought, with the same reamer, and fire-forming 300 Lapua cases with 100gr sierra's behind 39.0gr of H4831sc. These cases were all turned to .013 due to the .272nk. Here is what I came up with…</p><p></p><p>Rl-22 – Worked up from 39.0gr to 46.0gr with the 115MK, 210M primers and Lapua brass. At 46.0 grains I started seeing small pressure signs. Velocities at 46.0gr were 3034fps.</p><p></p><p>I decided to spend the first day and just concentrate on Rl-22. I loaded 9 separate three shot groups and started at 42.0gr. At 42.0gr the gun shot about an inch, at 42.5 it came in to about a half an inch and stayed there at 43.0gr. The velocities were 2817 and 2836 for 42.0 and 42.5gr respectively. Then at 43.5 (2901fps) everything came together when I shot a group measuring .176 that yielded a velocity deviation of only 6 fps. Needless to say I was happy. 44.0gr began to go vertical, while still good, and 44.5, 45, and 45.5 stayed just under half an inch. My last load 46.0gr again printed a great group measuring in the low .2's and again showed only 5 fps deviation at 3034fps. Extremely happy with those two groups and the low velocity spread I decided to stop load development there hoping to conserve some of the short barrel life of the 243 Ackley.</p><p></p><p>Regarding the 115DTAC's I simply can't say enough about the bullet. I have been using Tubbs estimated BC of .585 minus roughly 2% since I trim meplats and it seems to be fairly accurate. Since I built this rifle I have almost entirely hung up the 6.5-284, 300wby with 240MK's, and virtually all my other long range rifles. We have shot this out to 1200 yds with great results and I wouldn't hesitate to take a shot even further. You can literally follow the vapor trails all the way to the target due to the low recoil and when shooting them at 3000fps+, they rival or surpass the ballistics of most of these other calibers. Unlike the v-max, a-max, or ballistic tips the 115 does not have the same dramatic effect.</p><p></p><p>Rem 1 </p><p></p><p>(P.S. These loads worked in MY rifle. Use caution and work up to the above loads. Also verify all loads using a reliable loading manual.)</p></blockquote><p></p>
[QUOTE="remington 1, post: 107581, member: 3869"] Wildcat, Here are the specs of the rifle.. 243 Ackley (.272nk) Remington 700 short action trued 28 inch hart tapered to .940 at the muzzle. Hart muzzle break Jewel 2oz trigger. Shehane MBR “Sierra” Laminate Tracker (clear coated) Kelby rings (polished) Leupold Mark 4 M1 8.5-25x 50 In the last two years, with the help of a friend of mine, I have been learning to smith my own rifles. This was the third one I built. It’s just awesome to get behind one you put together yourself. I began by chambering a donor 700 laminated 243 that I bought, with the same reamer, and fire-forming 300 Lapua cases with 100gr sierra’s behind 39.0gr of H4831sc. These cases were all turned to .013 due to the .272nk. Here is what I came up with… Rl-22 – Worked up from 39.0gr to 46.0gr with the 115MK, 210M primers and Lapua brass. At 46.0 grains I started seeing small pressure signs. Velocities at 46.0gr were 3034fps. I decided to spend the first day and just concentrate on Rl-22. I loaded 9 separate three shot groups and started at 42.0gr. At 42.0gr the gun shot about an inch, at 42.5 it came in to about a half an inch and stayed there at 43.0gr. The velocities were 2817 and 2836 for 42.0 and 42.5gr respectively. Then at 43.5 (2901fps) everything came together when I shot a group measuring .176 that yielded a velocity deviation of only 6 fps. Needless to say I was happy. 44.0gr began to go vertical, while still good, and 44.5, 45, and 45.5 stayed just under half an inch. My last load 46.0gr again printed a great group measuring in the low .2’s and again showed only 5 fps deviation at 3034fps. Extremely happy with those two groups and the low velocity spread I decided to stop load development there hoping to conserve some of the short barrel life of the 243 Ackley. Regarding the 115DTAC’s I simply can’t say enough about the bullet. I have been using Tubbs estimated BC of .585 minus roughly 2% since I trim meplats and it seems to be fairly accurate. Since I built this rifle I have almost entirely hung up the 6.5-284, 300wby with 240MK’s, and virtually all my other long range rifles. We have shot this out to 1200 yds with great results and I wouldn’t hesitate to take a shot even further. You can literally follow the vapor trails all the way to the target due to the low recoil and when shooting them at 3000fps+, they rival or surpass the ballistics of most of these other calibers. Unlike the v-max, a-max, or ballistic tips the 115 does not have the same dramatic effect. Rem 1 (P.S. These loads worked in MY rifle. Use caution and work up to the above loads. Also verify all loads using a reliable loading manual.) [/QUOTE]
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6MM ACKLEY OR 243 ACKLEY
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