20 MOA mount question

[Vanilla Gorilla]

Ok so I have a Remington 700 sps tactical and I was looking into getting a new scope mount my question is, if I buy a 20 MOA scope mount will I run the risk of running out of scope adjustment at 100 yards? My thinking is 20 MOA is around 80 clicks on my scope (1/8" clicks) and that is a lot of clicks at 100 yards am I wrong? The long range game is all new to me and I think I can use some help here.
Thanks

[21SF]

How much adjustment does your scope have?

I dont think you will have a problem. Its hard to believe your scope wouldnt have 20 MOA range of adjustments.

Do you even need a 20 MOA base?

I have the same rifle with a 0 moa mount, i never shoot past 200 yards tho.

[BAGunner]

Depends on the height of the center of the ring and the internal range of the scope.

My 1" Bushnell 3200 has 80MOA elevation adjustment, so it's OK.

[socalblue]

A 20MOA base is needed on most .308 rifles to have enough elevation adjustment at 1,000 yards (Based on a 175GR SMK at 2650FPS). You essentially almost bottom out the scope to get a 100 yard zero so all the "up" is available.

On an urban tactical rifle I would not go over a 10MOA base as you may well need to adjust a zero to 50 or even 25 yards.

[Fjold]

It depends on the receiver of the gun. One of my guns with a 20 MOA mount would not shoot lower than 8" high at 100 yards with the scope adjusted all of the way down and another had no problem with a 30 MOA mount.

On a mount with a scope ring spacing of 4" every .010"of taper will result in a vertical change of 9" (almost 9 MOA) at 100 yards.

[G-forceJunkie]

If you need to shoot in close, its not difficult to find a "zero" for when the bullet crosses the line of site on the first pass. For example, on my .308 with a 20 moa base, If I need to shoot a 10 yard target, I dial in my 575 yd comeup. 25 yard target, i dial my 275 yd comeup.
OP: unless your scope has a limited amout of internal adjustment, there is no reason to not go with a 20moa base. For more long range shooting info, check out the CAPRC.com forums as well.

On an urban tactical rifle I would not go over a 10MOA base as you may well need to adjust a zero to 50 or even 25 yards.

[Vanilla Gorilla]

Ok so I don't think I need a 20 MOA because I don't plan to ever shoot over 500 yards

Ok I have another question now, do I need steel rings and mounts or will aluminum rings and mounts work? Also are steel rings and mounts better for any reason?

[6mmintl]

Go for a mil-dot reticle and use upper dots wit 20 moa base

[thenotoriousmo]

Ok so I have a Remington 700 sps tactical and I was looking into getting a new scope mount my question is

im assuming the scope is already on the rifle as you say you just want the mount, so turn in the down direction and start counting. if you have just over(have to account for the new height over bore) 80 clicks in your 1/8moa adjustments you should be fine. i could give you the exact number but that is more math than i feel like doing and would need to know some more details. but lots of people fun 20-30 moa bases and have 100yd zeros (i have a 20 and have down travel to spare)

i dont think i have ever been in the situation where i will dial in an adjustment to hit a 10yd targer with a 308. seems almost overkill to me and i cant see a reason to ever put a target that close using that calber.

[Fjold]

You don't need steel rings and bases but a lot of people like them. Of course, we don't need a lot of stuff that we buy.

[Vanilla Gorilla]

You don't need steel rings and bases but a lot of people like them. Of course, we don't need a lot of stuff that we buy.

Is there any advantage to steel over aluminum or is there any reason one would need the extra strength of steel rings and mounts?

[Vanilla Gorilla]

Depends on the height of the center of the ring and the internal range of the scope.

My 1" Bushnell 3200 has 80MOA elevation adjustment, so it's OK.

Where can I find how much elevation adjustment my scope has? It is a Simmons 44 mag 6-21x44

[joelogic]

Dont like Google?

People like to match the metal of the rings and mount for heat expansion.

Adjustment Range (in@100yds / m@100m): 45 / 1.3

45 minutes

[Vanilla Gorilla]

Dont like Google?

People like to match the metal of the rings and mount for heat expansion.

Adjustment Range (in@100yds / m@100m): 45 / 1.3

45 minutes

So the 20 MOA mount won't work at 100 yards with that scope then? Sorry but I don't get what "Adjustment Range (in@100yds / m@100m): 45 / 1.3" means is that 45 MOA total adjustment? Like I said the long range game is all new to me so I am sort of lost

[joelogic]

45 total minutes of adjustment but mechanical center is not necessarily zero at 100 yards. So if you zero at 100 yards it may be 10 minutes down and 35 up or vise versa.

It does seem complicated, though. Lets say mechanical zero is zero at 100 yards. You would have 22.5 minutes of adjustment up and down. So basically you could shoot out to lets says 400 yards (300yds is 18" of drop for .308) because you have 22 moa of adjustment. With a 20 MOA base you now have 42 MOA of adjustment to shoot out further but you would subtract 20 MOA from the close in stuff.

I hope I didnt confuse you more.