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Rifles, Reloading, Optics, Equipment
Reloading
Interesting chronograph results in 300WM load work up
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<blockquote data-quote="MallardAddict" data-source="post: 1211371" data-attributes="member: 3830"><p>I recently bought a custom R700 in 300 WM with a 24" 1:10 Obermeyer AMU contour. I have about 350 of the 208 AMAX and several pounds of R22 so I decided to start there. Using hornady's data I'm consistently 200--225fps faster then their data despite them using a 25" barrel.</p><p></p><p>I am jumping the bullets .025 to start and things look good. Best accuracy in my rifle is between 71-71.5 gr of powder. Hornady states 2800fps for 71gr and I'm getting 3010fps average with an SD of 7.3 and 3/4" groups at 200 yds. At 71.5gr I'm getting 3045fps average and an SD of 5.7 and 1/2" groups at 200 yds. </p><p></p><p>I tried their max load of 72.4grs which hornady states should do 2950fps and I get 3175fps with 13.5 SD and 1" groups.</p><p></p><p>My speeds were gathered via magnetospeed and double checked against another shooters Oheler and the variance between the 2 chronographs was less then 10fps.</p><p></p><p>My brass looks great, primers are still round on the edges and extraction was super easy.</p><p></p><p>I'm still a little leary of using the 208 AMAX on game as shots may range from 150yds to well past my comfort level. Seems the 212 eld-x is unobtanium so I may settle on the 200 eld-x and hope it shoots as well.</p><p></p><p>Anyways, i am a bit puzzled by the extra velocity over book with less barrel, but nothing i can see or measure makes me feel like im pushing my gun over pressure. </p><p></p><p>Long story short has anyone seen results like these?</p></blockquote><p></p>
[QUOTE="MallardAddict, post: 1211371, member: 3830"] I recently bought a custom R700 in 300 WM with a 24" 1:10 Obermeyer AMU contour. I have about 350 of the 208 AMAX and several pounds of R22 so I decided to start there. Using hornady's data I'm consistently 200--225fps faster then their data despite them using a 25" barrel. I am jumping the bullets .025 to start and things look good. Best accuracy in my rifle is between 71-71.5 gr of powder. Hornady states 2800fps for 71gr and I'm getting 3010fps average with an SD of 7.3 and 3/4" groups at 200 yds. At 71.5gr I'm getting 3045fps average and an SD of 5.7 and 1/2" groups at 200 yds. I tried their max load of 72.4grs which hornady states should do 2950fps and I get 3175fps with 13.5 SD and 1" groups. My speeds were gathered via magnetospeed and double checked against another shooters Oheler and the variance between the 2 chronographs was less then 10fps. My brass looks great, primers are still round on the edges and extraction was super easy. I'm still a little leary of using the 208 AMAX on game as shots may range from 150yds to well past my comfort level. Seems the 212 eld-x is unobtanium so I may settle on the 200 eld-x and hope it shoots as well. Anyways, i am a bit puzzled by the extra velocity over book with less barrel, but nothing i can see or measure makes me feel like im pushing my gun over pressure. Long story short has anyone seen results like these? [/QUOTE]
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Reloading
Interesting chronograph results in 300WM load work up
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