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Load Development Ruger Precision Rifle .243
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<blockquote data-quote="RonS" data-source="post: 1388278" data-attributes="member: 68613"><p>So the results are in. Tested in about 38 degrees today. Principally around two nodes. 45.4 and 47.8 grains of H1000 using CCI 200 primers, Hornady brass which was full length sized with unturned necks, 115 grain DTAC's with rebated boat tail and closed nose set .020 off the lands. The lower load is uncompressed. The higher load is compressed. This is through the Criterion 30 inch barrel with a match chamber and 7.5 twist. The barrel has about 100 rounds down it now so it should be broken in. Looking at it in a bore scope tonight after cleaning though it looked new.</p><p></p><p>Testing was done at 200 yards rather than my preferred 100. The 200 yard benches are out in the open and surrounded by about 5 inches of very sloppy snow that turns to mud as you stomp it down. The bench posts appear to be rotted or the ground is so soft that the slightest touch wobbles the bench. Coupled with the benches being to high it makes for a very iffy testing setup. The 100 yard benches are covered and nice and stable but there was a muzzle loader match hogging the whole line today. Anyway, the results were similar to 100 although the MOA opened up a bit. At 100 on the stable benched I had about .375 MOA at the lower load and about .25 MOA at the higher node. Today at 200 I was about a half MOA greater. Pretty sure it was due to the benches and the setup. More testing prone as the wet and the mud go away will tell.</p><p></p><p>So results at those two nodes are:</p><p></p><p>45.4 grains: V = 2964, SD = 13, ES = 31, MOA = .875 (no pressure sign)</p><p>47.8 grains: V = 3128, SD = 17, ES = 40, MOA - .750 (very slight primer cratering)</p><p></p><p>Nothing to brag about but it is what it was today. Both the SD and the ES are of course unacceptable. Those will translate to a lot of vertical at 1000 yards. The MOA is also unacceptable but at 200, those SD numbers don't really explain how it opened up .5 MOA over the 100 yard testing. Pretty sure it was the setup as my heartbeat was rocking the bench (or at least the gun). The only thing I was pleased with was the velocities.</p><p></p><p>I have some Federal 210m primers and some Lapua brass so the testing will continue. In general, I think that the 115 DTAC's are the way to go in this barrel. The lands are a bit close though and I need to seat the bullets deeper than I want to. May need to visit the PT&G website to order a 6mm throat reamer and extend the throat another .050-.100. It's only money right. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="RonS, post: 1388278, member: 68613"] So the results are in. Tested in about 38 degrees today. Principally around two nodes. 45.4 and 47.8 grains of H1000 using CCI 200 primers, Hornady brass which was full length sized with unturned necks, 115 grain DTAC's with rebated boat tail and closed nose set .020 off the lands. The lower load is uncompressed. The higher load is compressed. This is through the Criterion 30 inch barrel with a match chamber and 7.5 twist. The barrel has about 100 rounds down it now so it should be broken in. Looking at it in a bore scope tonight after cleaning though it looked new. Testing was done at 200 yards rather than my preferred 100. The 200 yard benches are out in the open and surrounded by about 5 inches of very sloppy snow that turns to mud as you stomp it down. The bench posts appear to be rotted or the ground is so soft that the slightest touch wobbles the bench. Coupled with the benches being to high it makes for a very iffy testing setup. The 100 yard benches are covered and nice and stable but there was a muzzle loader match hogging the whole line today. Anyway, the results were similar to 100 although the MOA opened up a bit. At 100 on the stable benched I had about .375 MOA at the lower load and about .25 MOA at the higher node. Today at 200 I was about a half MOA greater. Pretty sure it was due to the benches and the setup. More testing prone as the wet and the mud go away will tell. So results at those two nodes are: 45.4 grains: V = 2964, SD = 13, ES = 31, MOA = .875 (no pressure sign) 47.8 grains: V = 3128, SD = 17, ES = 40, MOA - .750 (very slight primer cratering) Nothing to brag about but it is what it was today. Both the SD and the ES are of course unacceptable. Those will translate to a lot of vertical at 1000 yards. The MOA is also unacceptable but at 200, those SD numbers don't really explain how it opened up .5 MOA over the 100 yard testing. Pretty sure it was the setup as my heartbeat was rocking the bench (or at least the gun). The only thing I was pleased with was the velocities. I have some Federal 210m primers and some Lapua brass so the testing will continue. In general, I think that the 115 DTAC's are the way to go in this barrel. The lands are a bit close though and I need to seat the bullets deeper than I want to. May need to visit the PT&G website to order a 6mm throat reamer and extend the throat another .050-.100. It's only money right. :) [/QUOTE]
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