SHOOTERS'
FORUM


FORUM MEMBERS: GO to http://forum.AccurateShooter.com/. Log in with SAME User Name and SAME Password.

THIS FORUM HAS MOVED!!
GO to Forum.AccurateShooter.com

THIS FORUM is NOT ACTIVE. POSTING and THREAD CREATION are halted.

You can read all posts on NEW FORUM: Forum.AccurateShooter.com

 
 |  Latest Topics
 
 
 


Reply
  Author   Comment   Page 2 of 2      Prev   1   2
ozman
Reply with quote  #9 
According to my ballistics program a .223 with a 40 gr V-Max at 3800 fps with a BC of .224 (Hornady factory load) will drop about 79" at 600 yds. It will drop about 125" at 700 yds. So with 1 moa= 6.288" at 600 yds and 10 moa in both directions from center in your scope plus the 20 from the bases, you got a total of 30 moa to work with. Therefore 30x6.288=188.64 so you are fine at 600. At 700 you got 7.33x30=219.9 which is also fine. Notice though that without the bases adjustment you would be just shy at 600 (62.88" and you need 79). I hope this makes sense and helps some.

john1c
Reply with quote  #10 
Just curious would Burris Signature rings and -20/+20 inserts get one out to 600 to 700 yards with the 8x32 Monarch and a 223? I'm thinking the 8x32 with 20 moa plus the -20/+20 (40 total) would do it pretty easy?


What was told to me was that the Monarch 8-32 with 20 moa is total, meaning -10/+10.
ozman
Reply with quote  #11 
Hi Jim:
According to Sierra the 77gr. MK has a BC of .362 at velocities between 2500 and 3000 fps. I guess the answer all depends on what yardage you want to zero your rifle at. At a 100 yard zero at your stated velocity of 2800 fps my program says your bullet will drop 10.73 moa at 500 and 14.95 moa at 600. This assumes a 100 yard zero though. With a 200 yard zero you would need 9.19 at 500 and 13.41 at 600. It would seem then that you would be a tad short with the 8-32X monarch at 500 and a lot short at 600 since you have +10/-10 moa from center with that model (if I understand it right) with a 100 yd zero. With the 200 yard zero you would be ok at 500 but still a bit short at 600. It seems to me that scope was designed to be used at ranges up to about 400-500 yds really (most hunting situations). The scope I bought has 30 moa (6-24X 50 SF) which is a little more than the one you are considering, and it would be sufficient for your load at 600 but just barely. I notice though that the 4-16X42 SF has 40 moa total so that would be twice as much as the 8-32X model. That would be more than enough then at 600 yds, although you lose half the magnification. I also notice that the 3-12X42 SF has 60 moa. By the way what were they asking for that scope? And what were you wanting that scope for? Long distance target shooting? Thanks.

Hugh

PS I was just doing a little experimenting and it seems that if you wanted to zero at 400 yds it might be good at 600. Here are the moa for various ranges with a 400 yd zero with your load:

100=-7.13
200=-5.59
300=-3.04
400=0
500=+3.60
600=+7.82
700=+12.62

So it seems you COULD get it to work with a 400 yd zero at 600 yards (but not 700) although at closer ranges you sure would be shooting high (over 11 inches high at 200)!
Previous Topic | Next Topic
Print
Reply

Quick Navigation:


Create your own forum with Website Toolbox!


You Can Help Support 6mmBR.com by Making a Small, Secure Donation.

Daily Shooter's Bulletin



Sponsored Searches Help Support this Forum