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NC_Army_Guy
Optics GrassHopper Joined: February/01/2011 Location: NC Status: Offline Points: 10 |
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Reegan,
A fixed power scope will work well for your mil adjustments on your scope. Once you get into variable power scopes, unless you are using a first focal plane (FFP) retical, the mil adjustments will change based on the variable power setting and are only true at one setting (usually 10x or max power, depending on brand). And most FFP scopes are fairly expensive. I use a second focal plane (SFP) Bushnell Tactical Elite 2.5-16x42 on my Remington .308 and it works impressively! I bought it on www.swfa.com, but it may be a little out of your price range, but is worth it.
Also, with reloading there are a lot of variable put into play (powder type, powder ammount, bullet coefficient, bullet weight, etc.) I would recommend doing a lot of research into the caliber. Everyone one here is correct is stating the .308 is easy for reloading, lots of brass available and a large selection of bullets. If you're not familiar with it, I would recommend using a ballistics calculator to "get close" on your targeting. Also, this will give you the MOA adjustments needed at various ranges based on your zero range. 100yds might be a little close to zero for 600yd shooting. I would recommend a 300yd zero....
Which goes on to the next point. Whichever scope you choose has to have enough elevation change built in to adjust for 600yds based on your zero range. If a scope only has 50 MOA of adjustment and you need 65 to reach 600yds, you'll have to re-zero the rifle at a farther range (since bullets travel in a parabolic curve). The use of the ballistics calculator can also help ensure the scope you choose has enough adjustments based on the zero range you choose (it will list the adjustments needed out to as far as you input).
And now to the next point. You'll want to find a scope that "tracks" well. Which means, you can adjust your MOA to reach a desired range, then crank it back down to zero and it won't "lose its zero". Some of the lower priced scopes have a problem with tracking, which will frustrate the hell out of you on the range. Once you've established a good zero, let's say at 100yds, and want to shoot 300yds, you can adjust the elevation on your scope to the recommended MOA (based on the ballistics calculator). You can then shoot the SAME 100YD TARGET and measure this distance between shot groups. This should correspond to the distance given on the ballistics calculator as the height at 100yds of a 300yd zero. You can then crank it back down to the 100yd zero point you used previously and shoot the same target again. It should give you the same elevation shot group you shot the first time. (All of this assumes the same loads for each shot).
Here's a link to a ballistics calculator I use: http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi
Hopefully this helps some.
Rick
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308 Sav
Optics Journeyman Joined: July/18/2010 Location: Kentucky Status: Offline Points: 362 |
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Did I miss read this. If the scope does not have enough adjustment to reach 600 yards then it does not matter if it was zeroed at 100 or any range it will not get you to 600 unless you are doing holdovers. Without a canted base. or some other means of changing the position of the scope on the rifle.
Edited by 308 Sav - March/11/2011 at 15:58 |
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Gerald Baker
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NC_Army_Guy
Optics GrassHopper Joined: February/01/2011 Location: NC Status: Offline Points: 10 |
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Gerald,
Here's a chart for a .308 165gr bullet (all input was made up off the top of my head) at a 100 yrd zero.
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