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#5561970 - 01/24/15 11:54 AM Do I need a 20 MOA base?
aggiegolfer09 Online   content

Registered: 12/21/14
Posts: 235
Loc: Dallas
Just got a savage 11 in 6.5 creed and a vortex viper 4-16x60 hs-lr.

I was planning on sighting it in at 200 yards. I would like the ability to shoot out to 600 to 800 yards.

#5562120 - 01/24/15 01:54 PM Re: Do I need a 20 MOA base? [Re: aggiegolfer09]
Gone to Texas Offline
Veteran Tracker

Registered: 07/05/13
Posts: 2642
Loc: Hurst
For what its worth, I am getting a 20 MOA base for my 6.5 CM.

#5562126 - 01/24/15 01:56 PM Re: Do I need a 20 MOA base? [Re: aggiegolfer09]
Ritter Online   content

Registered: 02/15/09
Posts: 286
Loc: Southern Oklahoma
Short answer is no.
The scope has more than enough internal adjustment to shoot those distances.

#5562138 - 01/24/15 02:15 PM Re: Do I need a 20 MOA base? [Re: aggiegolfer09]
Happy Birthday T Bone Offline
THF Trophy Hunter

Registered: 09/20/09
Posts: 7490
Loc: Up in the cheap seats..
Wouldn't hurt..
Originally Posted By: Jungleexplorer
I really hate to do what I am about to do, because it will be very painful for you.

#5562189 - 01/24/15 02:57 PM Re: Do I need a 20 MOA base? [Re: aggiegolfer09]
headhunter54 Offline

Registered: 07/07/11
Posts: 580
Loc: Longview, TX
I would go 20 MOA if you haven't already bought a base.

#5562218 - 01/24/15 03:15 PM Re: Do I need a 20 MOA base? [Re: aggiegolfer09]
Slow Drifter Online   content

Registered: 04/09/09
Posts: 4537
Loc: Central Texas
Just keep in mind you'll lose 20 minutes of mechanical down on the scope, but gain the same 20 on top. If the scope has 80 minutes of total internal adjustment, you'll have 60 up and 20 down. Minus 20 becomes your new mechanical zero because your scope is now 20 minutes off parallel with the rifle.
"I have no idea what WW-III will be fought with, but WW-IV will be fought with sticks and stones."

A. Einstein

#5562289 - 01/24/15 04:29 PM Re: Do I need a 20 MOA base? [Re: aggiegolfer09]
usdrscott Offline
Bird Dog

Registered: 01/13/14
Posts: 345
Loc: TX - Texas
Leupold has a sale on there mark 4 bases 15 moa I believe
"Never argue with stupid people, they will drag you down to their level and then beat you with experience."

#5563500 - 01/25/15 12:37 PM Re: Do I need a 20 MOA base? [Re: aggiegolfer09]
ChadTRG42 Offline
THF Celebrity

Registered: 09/16/09
Posts: 12697
Loc: Lewisville, TX
Let's calculate it. The vortex viper 4-16x60 hs-lr has a total of 75 MOA of internal available elevation. If you run a standard (zero cant) base, your zero will be about in the middle of the 75 moa. This will allow you about 37.5 moa up and 37.5 down.

If you run a 20 moa base, you decrease your bottom end by 20 moa, which puts you at 17.5 remaining in the down, and 57.5 up for elevation. I recommend not going less than 10 moa remaining for your down amount. IMO, you have enough room for running a 20 moa base. But, when the reticle is placed at the near bottom end of the scope, you decrease the amount of available windage. 17.5 moa should be enough, but if the scope is mounted right or left, you may run out of left and right adjustment.

In this rifle set-up for the 6.5 CM, you will need about 25 moa to get to 1K yards. So, even without the 20 moa base, there is still plenty of elevation available (37.5 moa) to reach out to 1K yards. So, is the 20 moa base needed, no. Can you still use a 20 moa base, yes, but with the added risk of the windage issue. I wouldn't run a 20 moa base with this set-up. The scope will have full function and full windage available without the 20 moa base.

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