Scope base height

[JimD72]

Can anyone point me in the right direction? I’m trying to under stand scope base height. Building a .22LR was going to get a 20 moa base then I was informed about 30 moa and also 50 moa. What’s the deal with the different heights? I’m planning on shooting long range with this rifle 200-300 yards for fun and competing.
Thanks

 

[Rob01]

It just gives you more elevation by readjusting the existing elevation in your scope. So if you had 100 moa in the scope and used a 20 moa base you would end up with 70 up and 30 down. With a 30 moa it would be 80 up and 20 down. I would never go 50 moa with a scope with only 100 moa but again depends on your scope. What scope you using?

 

[JimD72]

It’s an Arken EPL-4 7-24x50 in mil

 

[Rob01]

That scope has 20 mils or 68 moa. I wouldn’t go over 20 moa with that scope.

 

[JimD72]

Thanks Rob

 

[GIXXER2000]

I run a 30 moa rail on my CZ 457 MTR and would have go 40 moa but AREA 419 only has 30 and 50 moa. I am using a Vortex Venom with max 25 mils of travel. I lost 4.8 mils when I zeroed so I know 40 would work but not 50 moa.

 

[TheOtherAndrew]

the thing to consider IMO is the more canted rail you get = what for optical center shots (where is the super sweet spot - yardage). So you may be able to shoot further but your eye box will be more finicky than normal. Not a huge deal in the 20MOA category but 50-100MOA you better know exactly why you are doing that or you may end up thinking you're scope sucks....

 

[Rob01]

It all comes down to the amount of elevation in the scope. Scopes like the Zeiss S3 4-25 and Tract 4-25 with about 47 mils of elevation or 160 moa then using a 60 moa or more base is fine.