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10x and .308

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/23/2007 at 19:53
tucansam View Drop Down
Optics Apprentice
Optics Apprentice


Joined: February/05/2007
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Years ago a friend of mine gave me a detailed explanation of why 10x scopes were chosen (and are perfect for) the .308.  It was a highly technical discussion of which I remember little.  Can anyone expand on this?  Thanks.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/23/2007 at 23:21
Urimaginaryfrnd View Drop Down
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Resident Redneck

Joined: June/20/2005
Location: Iowa
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They are a good choice because it makes the math simple. 10x at 1000 yds is like open sights at 100 yds. The .308 is about a 750 yd gun and around 800 the bullet drops below the speed of sound causing some instability.  Now for the reality check - most rifles are ok for large game out to 300 yds and most people cant hid sh-- after that, if that far. Take a really good rifle like a Tac Ops custom rifle or a GAPrecision custom rifle and it will shoot between 1/4 to1/2 inch group at 100 yds. That translates into a 2.5 inch to 5 inch group at 1000. Wind has a lot to do with where bullets go when you get past 200 yds. Tactical scopes allow you to dial in correction for wind drift and trajectory.

Now is a 10x the right scope for a .308 the answer is sometimes because it all depends on what you will do with the rifle.  For hunting the most popular scopes are the 3-9x40 and the improved newer versions that go 2.5-10x40. For tactical close range one might use an EOTech or an Aimpoint or a low power variable like 1.5-6 etc.

For long distance targets on a bench a high power variable like 8.5-25x50 might be used or my favorite a 4.5-14x50  Eaven a fixed 4x or 6x has a lot going for them with a large exit eye pupil so they are a bright scope for hunting in low light.   Price is a huge factor one guy may be able to spend $3000 0n a S&B where another may find it a struggle to afford a Weaver K4.

So what is on my .308 a 10x42 Super Sniper and I like it. If I had another .308 I would like to have a variable like a 4.5-14x50  Tell us how you hunt or what type shooting you do and what price range and we will try to help.

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