Rifle Scopes NEED HELP WITH AI AND SCOPE MOUNT
- Thread starter Judge
- Start date
Re: NEED HELP WITH AI AND SCOPE MOUNT
Should get you to 1300-1350 depending on load/elevation, and assuming the optic is close to mechanically zeroed.
Kirk R
Should get you to 1300-1350 depending on load/elevation, and assuming the optic is close to mechanically zeroed.
Kirk R
Re: Need Help With Accuracy Int Scope Mount
Thanks for the info, the Schmidt & Bender 10X42 PM2 has 130cm/46.8" elevation total. That's why I thought the 18moa mount would not be enough for 1000 yard hits with 175gr FGMM in a 20" barrel.
I think this base and scope combo gets me approximately 5.5 feet of elevation total.
Thanks for the info, the Schmidt & Bender 10X42 PM2 has 130cm/46.8" elevation total. That's why I thought the 18moa mount would not be enough for 1000 yard hits with 175gr FGMM in a 20" barrel.
I think this base and scope combo gets me approximately 5.5 feet of elevation total.
Re: Need Help With Accuracy Int Scope Mount
The answers above are not correct.
With that scope, you will need a 28 MOA AI base to get out to 1000 yards with a .308.
Here's the reason. The total adjustment in the scope from a flat base includes both up and down elevation.
That means from a flat base, you'd have, with that scope 6.6 mils up and 6.5 mils down. Plus, you lose about 1.25 mil or about 4.25 MOA in achieving a 100 yard/meter zero, due to the drop over the zero distance.
So, you really only have about 5 mils of up elevation available from a flat base.
If you add 5.25 mils (the mil equivalent of 18 MOA), you get 10.25 mils, which is not enough to get most .308 loads out to 1000 yards at sea level on a cool day.
The next increment available in AI bases is 28 MOA, or 8.15 mils. With that added to the 5 mils of scope adjustment, you've got enough to get a .308 to 1000 yards.
So, 18 isn't going to do it.
The answers above are not correct.
With that scope, you will need a 28 MOA AI base to get out to 1000 yards with a .308.
Here's the reason. The total adjustment in the scope from a flat base includes both up and down elevation.
That means from a flat base, you'd have, with that scope 6.6 mils up and 6.5 mils down. Plus, you lose about 1.25 mil or about 4.25 MOA in achieving a 100 yard/meter zero, due to the drop over the zero distance.
So, you really only have about 5 mils of up elevation available from a flat base.
If you add 5.25 mils (the mil equivalent of 18 MOA), you get 10.25 mils, which is not enough to get most .308 loads out to 1000 yards at sea level on a cool day.
The next increment available in AI bases is 28 MOA, or 8.15 mils. With that added to the 5 mils of scope adjustment, you've got enough to get a .308 to 1000 yards.
So, 18 isn't going to do it.
Re: Need Help With Accuracy Int Scope Mount
Lindy,
Thanks for coming to the rescue.
With the 18 moa scope mount and this scope, what do you think is the farhest I can shoot?
Since AI has yet to make a 28moa 30mm piccatiny mount, I would have to get a 34mm mount and get the reducing rings.
Do you think I can obtain a 100 yard zero with the 28 moa scope mount?
Best,
Judge
Lindy,
Thanks for coming to the rescue.
With the 18 moa scope mount and this scope, what do you think is the farhest I can shoot?
Since AI has yet to make a 28moa 30mm piccatiny mount, I would have to get a 34mm mount and get the reducing rings.
Do you think I can obtain a 100 yard zero with the 28 moa scope mount?
Best,
Judge
Re: Need Help With Accuracy Int Scope Mount
It might be useful to note that the scope has no parallax adjustment. The fixed parallax is set for 300 meters. If you want to get a .308 out to 1000 yards, a better S&B would be the 4-16X50.
There is nothing wrong, though, with getting the 28 MOA mount and using it with the reducing rings. I shot a scope that way for about 3 years.
The approximately 10 mils of elevation adjustment you'd have with the 18 MOA base will get you to around 900 yards or so. That's pushing the practical limit of a .308 anyway. The military considers that to be about the limit for a 7.62X51 - and they're right.
It might be useful to note that the scope has no parallax adjustment. The fixed parallax is set for 300 meters. If you want to get a .308 out to 1000 yards, a better S&B would be the 4-16X50.
There is nothing wrong, though, with getting the 28 MOA mount and using it with the reducing rings. I shot a scope that way for about 3 years.
The approximately 10 mils of elevation adjustment you'd have with the 18 MOA base will get you to around 900 yards or so. That's pushing the practical limit of a .308 anyway. The military considers that to be about the limit for a 7.62X51 - and they're right.
