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Rifles, Reloading, Optics, Equipment
Reloading
300win mag 215 berger help
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<blockquote data-quote="Okanogan" data-source="post: 1344454" data-attributes="member: 90397"><p>What is considered good enough accuracy is pretty subjective, depending largely on your objectives. Brian Litz and his WEZ modelling concepts for probabilistic results might be good starting point for assessing your needs. For myself, when shooting a custom rifle with the potential for long range application, I want consistent 1/2 MOA or better with SD +/- 10 fps. When using my dad's old Model 70 30-06 for general purpose hunting, I am happy with 1 MOA and don't pay much attention to ES/SD.</p><p></p><p>I've recently been following Adam MacDonald's blog on line. (He is the auto-trickler inventor and a competitive shooter in Canada.) Adam has an interesting working theory that charge weight is the main driver for SD/ES and seating depth is the main driver for group size. My own experience tells me this is not always the case, but as he points out in his blog, it sure simplifies testing to use this theory for load development. In my case for 215 Bergers and my 300 WM, changing the seating depth gave me a dramatic improvement in group size once I backed off more than I had typically been trying. It was also interesting to note that I achieved very similar group sizes for both RL26 and H1000 when pushing similar muzzle velocities.</p><p></p><p>I agree with Zeke-BE in the respect that some of my most significant improvements in group size seem to be when I change an important variable. Unfortunately, determining that key variable for a particular rifle/ bullet seems to all too often be mostly a matter of chance in my load development. Most times, it seems to be incremental gains as Zeke-BE indicates and no real break through gains.</p></blockquote><p></p>
[QUOTE="Okanogan, post: 1344454, member: 90397"] What is considered good enough accuracy is pretty subjective, depending largely on your objectives. Brian Litz and his WEZ modelling concepts for probabilistic results might be good starting point for assessing your needs. For myself, when shooting a custom rifle with the potential for long range application, I want consistent 1/2 MOA or better with SD +/- 10 fps. When using my dad's old Model 70 30-06 for general purpose hunting, I am happy with 1 MOA and don't pay much attention to ES/SD. I've recently been following Adam MacDonald's blog on line. (He is the auto-trickler inventor and a competitive shooter in Canada.) Adam has an interesting working theory that charge weight is the main driver for SD/ES and seating depth is the main driver for group size. My own experience tells me this is not always the case, but as he points out in his blog, it sure simplifies testing to use this theory for load development. In my case for 215 Bergers and my 300 WM, changing the seating depth gave me a dramatic improvement in group size once I backed off more than I had typically been trying. It was also interesting to note that I achieved very similar group sizes for both RL26 and H1000 when pushing similar muzzle velocities. I agree with Zeke-BE in the respect that some of my most significant improvements in group size seem to be when I change an important variable. Unfortunately, determining that key variable for a particular rifle/ bullet seems to all too often be mostly a matter of chance in my load development. Most times, it seems to be incremental gains as Zeke-BE indicates and no real break through gains. [/QUOTE]
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Reloading
300win mag 215 berger help
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