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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5 sherman q&a
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<blockquote data-quote="CliffM" data-source="post: 921144" data-attributes="member: 11533"><p>For those interested in the 6.5 Sherman, the 160 Matrix, and/or Reloader 33 I thought today's range results might be helpful.</p><p></p><p>I have been dipping into bigngreen's stash of R33 to see if it would be of any use in this cartridge with this bullet. My expectation was that this powder would be too slow to produce top velocities.</p><p></p><p> The first outing tested loads from 66Gr up to 70gr with a velocity of 3082 fps. I figured the 70gr to be the max as it is fairly compressed, though with no signs of excess pressure. </p><p></p><p> </p><p>Second outing went back with the 69gr load to see what it did accuracy wise. It was not all that good, dismal actually, I didn't even bother to measure it. I wasn't going to pursue it any further and then I read where others found that R33 performs better with the bullet seated into the lands. My best groups with the 160gr bullet has been seated to .090" short. Hmmmm??? worth a try.</p><p></p><p>Third outing I dropped the charge to 68gr to offset the increase in pressure by seating into the lands.</p><p> Load: win 270 brass</p><p> Matrix 160 vld</p><p> 58gr R33</p><p> f210 primer</p><p> 3.530" COAL increased from 3.34" used on previous loads</p><p></p><p>Velocity went up to an average of 3110 with an e.s. of 20,group size shrank to .381"for 5 shots <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>I wouldn't recommend this load to any one as my barrel has a bit over 1300 rounds through it and the wear may allow for a somewhat softer start.</p><p></p><p>My conclusions from this are: </p><p>1) seating the bullet into the lands increases pressure and thus velocity significantly more than I had imagined. From 298fps-3.34" to 3110fps-3.530"</p><p>2)The 160 Matrix is quite tolerant to seating depth changes.</p><p>3)Reloader 33 is well suited to this cartridge with the heavy bullets</p><p>4)Reloader 33 does at least in this limited test do better with bullet seated into the lands</p><p></p><p>Cliff</p></blockquote><p></p>
[QUOTE="CliffM, post: 921144, member: 11533"] For those interested in the 6.5 Sherman, the 160 Matrix, and/or Reloader 33 I thought today's range results might be helpful. I have been dipping into bigngreen's stash of R33 to see if it would be of any use in this cartridge with this bullet. My expectation was that this powder would be too slow to produce top velocities. The first outing tested loads from 66Gr up to 70gr with a velocity of 3082 fps. I figured the 70gr to be the max as it is fairly compressed, though with no signs of excess pressure. Second outing went back with the 69gr load to see what it did accuracy wise. It was not all that good, dismal actually, I didn't even bother to measure it. I wasn't going to pursue it any further and then I read where others found that R33 performs better with the bullet seated into the lands. My best groups with the 160gr bullet has been seated to .090" short. Hmmmm??? worth a try. Third outing I dropped the charge to 68gr to offset the increase in pressure by seating into the lands. Load: win 270 brass Matrix 160 vld 58gr R33 f210 primer 3.530" COAL increased from 3.34" used on previous loads Velocity went up to an average of 3110 with an e.s. of 20,group size shrank to .381"for 5 shots :) I wouldn't recommend this load to any one as my barrel has a bit over 1300 rounds through it and the wear may allow for a somewhat softer start. My conclusions from this are: 1) seating the bullet into the lands increases pressure and thus velocity significantly more than I had imagined. From 298fps-3.34" to 3110fps-3.530" 2)The 160 Matrix is quite tolerant to seating depth changes. 3)Reloader 33 is well suited to this cartridge with the heavy bullets 4)Reloader 33 does at least in this limited test do better with bullet seated into the lands Cliff [/QUOTE]
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