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Hunting
The Basics, Starting Out
Rifle accuracy.
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<blockquote data-quote="7mmTikkaShooter" data-source="post: 2609652" data-attributes="member: 92915"><p>This is a great question. For me I like to look at what extreme spread velocities I'm getting as well as the game hunted. For deer I consider a 10" plate the optimum kill zone. So at 1000 yards that's 1" or 0.96 MOA. With an extreme spread of 0 FPS you could say 1" gets it done, but that's not realistic. A 50 FPS E.S. could mean more than 10" of POI difference between high and low which I would not be comfortable with. I've seen one hole groups that measured small at 100 but still chronographed with over 60 FPS E.S. If that was the case I would limit my hunting range. For example I have a rifle that shoots 1/2 MOA all day at 100 yards. The load shoots just under 20 FPS E.S. So if I put that through a ballistic calculator with a good estimate of environmental conditions I'll be hunting in, I get a 5" variance at 1000 PLUS 3.7" difference in drop between high and low velocities which gives me an 8.7" reliable impact zone. That's if I do my job behind the scope and doesn't completely account for variance in powder burn rate change with temperature or variable winds etc. Thusly this gun for me would be pretty maxed out on deer sized game. Not to say this can't be done but it goes without saying that the farther out you go the smaller the margin for error. Just how I figure out my maximum acceptable hunting range, but I think it illustrates why you can't just use a 100 yard accuracy for LR hunting. My short answer is 1/2 MOA at 100 to start, but I really hope you practice at real distances (if possible) as well to validate what's truly acceptable accuracy to harvest an animal. Try to chronograph if you have one to get a good idea of what your E.S.'s are. I know it was a simple question but honestly it's just not a simple answer IMO. Hope this helps.</p></blockquote><p></p>
[QUOTE="7mmTikkaShooter, post: 2609652, member: 92915"] This is a great question. For me I like to look at what extreme spread velocities I’m getting as well as the game hunted. For deer I consider a 10” plate the optimum kill zone. So at 1000 yards that’s 1” or 0.96 MOA. With an extreme spread of 0 FPS you could say 1” gets it done, but that’s not realistic. A 50 FPS E.S. could mean more than 10” of POI difference between high and low which I would not be comfortable with. I’ve seen one hole groups that measured small at 100 but still chronographed with over 60 FPS E.S. If that was the case I would limit my hunting range. For example I have a rifle that shoots 1/2 MOA all day at 100 yards. The load shoots just under 20 FPS E.S. So if I put that through a ballistic calculator with a good estimate of environmental conditions I’ll be hunting in, I get a 5” variance at 1000 PLUS 3.7” difference in drop between high and low velocities which gives me an 8.7” reliable impact zone. That’s if I do my job behind the scope and doesn’t completely account for variance in powder burn rate change with temperature or variable winds etc. Thusly this gun for me would be pretty maxed out on deer sized game. Not to say this can’t be done but it goes without saying that the farther out you go the smaller the margin for error. Just how I figure out my maximum acceptable hunting range, but I think it illustrates why you can’t just use a 100 yard accuracy for LR hunting. My short answer is 1/2 MOA at 100 to start, but I really hope you practice at real distances (if possible) as well to validate what’s truly acceptable accuracy to harvest an animal. Try to chronograph if you have one to get a good idea of what your E.S.’s are. I know it was a simple question but honestly it’s just not a simple answer IMO. Hope this helps. [/QUOTE]
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The Basics, Starting Out
Rifle accuracy.
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