Re: AR30 Set up?
If it truly is a BR model, than it is 1/8 moa therefore you only have 50 total minutes of travel and if you want your scope optically centered, you will only have 25 or so. Even if you put a 20 minute rail on instead of your 15 that you mentioned, you will not have enough adjustment.
1500 meters equals 164<font color="red">1</font> yards, not 1640 like earlier mentioned (not that one yard is going to make a diff).
A good load of RL22 at 89 grains will launch a 250 MK at about 3000 fps. Zeroed at 100 yards, this combo needs 52.4 mimutes of elevation for a 1500 meter zero at my elevation of 5000 feet above sea level. A 20 minute insert would not do it because you would only have 25 in your scope, and 20 in a base (and that is if your receiver is perfectly flat and you don't lose some in slop of the workmanship) and you need 52.
A 300 MK launched at 2750 by a good charge of 91 grains of RL25 needs 54 minutes which is still too many. 1500 meters is a LOOONG WAAAY! Even 50 bmg's need some serious cranking up to get there.
What you can do is get a Ken Farrell base with 20 minutes built into it, then get Burris Posi-align rings and put in 10 or 20 more minutes in the inserts and you will be there. Or you can swap that BR model for an NXS and get a 20 rail and get there too.
When I responded earlier, I guessed that you were using an NXS model with more internal adjustment.
hope this helps. [img]/ubbthreads/images/graemlins/wink.gif[/img]
If it's not far, it's boring.