Rifle Scopes Scope hight turret range

[Knut211]

All right just got a sps 700 tactical Bushnell 6x24x50 4200 elite tact my question is about scope hight

Went to the range today zeroed at one hundred yards. Couldn't be happier with the rifles performance. The elevation turret is now about in the middle of it's up and down travel. Is there any way to be able to get more elevation out of it for longer distance shooting in the future.

 

[Nortex]

A base with moa built in will allow more elevation.

 

[Knut211]

I have 20 MOA BASE guess I'm just wondering if this is common or something wrong with my setup

 

[Trigger Monkey]

Is the base bedded to the receiver? It's been my experience that if the base isn't bedded then when the base screws are torqued down it flexes the base and negates some of the forward slope. I had a scope once on an un-bedded 30 MOA base that was giving me about the amount of elevation adjustment that I would've had if it was on a 20 MOA base, it was confounding. I put a straight edge on it and even though it was a steel base it had a nice bow to it. I bedded it with Marine-Tex and afterward it passed the straight edge test. Once I got it rezeroed I had about the amount of elevation I expected to get with the 30 MOA base.

 

[Knut211]

Base isn't bedded and straight edge touches the length of base

 

[roggom]

20 MOA base is good, but also consider the hight of reticle over the bore. Some rails are quite high and then combined with Med or higher rings and you sort of cancel out the cant. Warne and TPS make some rather low rings.

Remember, when dialing elevation you are actually moving the reticle closer to the bore, this forces you to raise your rifle higher to obtain the same zero point. The higher the scope is mounted, the more "elevation" is eaten up.

 

[Knut211]

Ok makes sense shoud ditch the medium rings and get low rings will switching to low ring make a big difference in elevation would make my Cheek weld a lot better

 

[Trigger Monkey]

20 MOA base is good, but also consider the hight of reticle over the bore. Some rails are quite high and then combined with Med or higher rings and you sort of cancel out the cant. Warne and TPS make some rather low rings.

Remember, when dialing elevation you are actually moving the reticle closer to the bore, this forces you to raise your rifle higher to obtain the same zero point. The higher the scope is mounted, the more "elevation" is eaten up.

No it's not, when you are dialing in elevation the erector is actually going higher in the tube. This is because the image the reticle "sees" is up side down, the ocular flips it so that we see it right side up.

 

[Knut211]

Thanks for the help I'm sure I'll have some more questions. Any tips or advise. Right away

 

[roggom]

belay my last

Edit:

OK had some time to let this one sink in. So for edification purpose let me pose this thought/question.

Looking at your website (I believe), inside the scope, the erector tube and physical reticle move up in the scope tube when dialing for elevation.

This is because the image at that given focal plane is upside down, but optically we are moving the reticle down(in reference to the target.)

So, with an optically centered and zeroed scope, internal physical/reticle up = optical/reticle down.

When we cant the entire scope down, in essence we are moving optical/reticle down(or moving target up in the focal plane). To compensate we must move internal/reticle down to then move optical/reticle up. The end result is a new zero, which is at the "lower end" of erector travel, thus giving the shooter more elevation.


So, to my original point, if we start with a zeroed scope, in med or high rings, and then move the entire scope down to low rings, will the image not move optical/reticle down? Will it not have a similar effect to canting the scope?

20 moa cant is only .32 degrees of movement. I just cant shake the idea; that downward movement of the entire scope has to effect scope zero.