I have a SS 5-20x50 on order. I am going to put it on a Savage Model 10 FCP-K. I would like to have the ability to reach up to 1000 yards. From what I read I would need to probably use something like Federal Premium Gold Match in 175 or 190 grain HPBT. As best as I can calculate (I'm a novice at this) with a 168 grain round the 15 mil up elevation available in the scope would be enought to compensate for drop. Elevation would be marginal for the 175 and totally inadequate for the 190. I don't want excessive cant in the base to get a 190 out to 1000 yards. Will 10 MOA in a base do it or 25 the minimum?
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Rifle Scopes How much base cant
- Thread starter mlwjackson
- Start date
Re: How much base cant
I don't think you need a canted base for SS. It doesn't look like your calculating your drop correctly since there is less drop with a FGMM 175gr (vs 168) at 1k yards. What calculator are you using?
I don't think you need a canted base for SS. It doesn't look like your calculating your drop correctly since there is less drop with a FGMM 175gr (vs 168) at 1k yards. What calculator are you using?
Re: How much base cant
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mlw</div><div class="ubbcode-body">I have a SS 5-20x50 on order. I am going to put it on a Savage Model 10 FCP-K. I would like to have the ability to reach up to 1000 yards. From what I read I would need to probably use something like Federal Premium Gold Match in 175 or 190 grain HPBT. As best as I can calculate (I'm a novice at this) with a 168 grain round the 15 mil up elevation available in the scope would be enought to compensate for drop. Elevation would be marginal for the 175 and totally inadequate for the 190. I don't want excessive cant in the base to get a 190 out to 1000 yards. Will 10 MOA in a base do it or 25 the minimum? </div></div>
You will want to use a 20-30MOA canted base dial to 1,000 yards plus. The heavier and slower your bullets the more cant you can use. Most scopes are better with the reticle adjusted closer to the center of their adjustment range. My stnadard .308 handload for Hornady 168grain A-MAX chronos @ 2,730fps. For this load I have to dial 10.1 mils up at 1K yards. My PH5-25 has about 30 mils of adjustment. So if the reticle is centered at 15 mils and I have to dial 10.1 mils up I'm getting close to the limit of adjustment. A 20MOA canted base gives me about 6 mils of additional adjustment so the scope reticle will be a little bit closer to centered. Even to zero at 100 yards you will need 1.2+ mils of elevation or so.
HTH!
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mlw</div><div class="ubbcode-body">I have a SS 5-20x50 on order. I am going to put it on a Savage Model 10 FCP-K. I would like to have the ability to reach up to 1000 yards. From what I read I would need to probably use something like Federal Premium Gold Match in 175 or 190 grain HPBT. As best as I can calculate (I'm a novice at this) with a 168 grain round the 15 mil up elevation available in the scope would be enought to compensate for drop. Elevation would be marginal for the 175 and totally inadequate for the 190. I don't want excessive cant in the base to get a 190 out to 1000 yards. Will 10 MOA in a base do it or 25 the minimum? </div></div>
You will want to use a 20-30MOA canted base dial to 1,000 yards plus. The heavier and slower your bullets the more cant you can use. Most scopes are better with the reticle adjusted closer to the center of their adjustment range. My stnadard .308 handload for Hornady 168grain A-MAX chronos @ 2,730fps. For this load I have to dial 10.1 mils up at 1K yards. My PH5-25 has about 30 mils of adjustment. So if the reticle is centered at 15 mils and I have to dial 10.1 mils up I'm getting close to the limit of adjustment. A 20MOA canted base gives me about 6 mils of additional adjustment so the scope reticle will be a little bit closer to centered. Even to zero at 100 yards you will need 1.2+ mils of elevation or so.
HTH!
Re: How much base cant
I used the calculator at www.handloads.com. The 190 data was, upon second look, for 300 Win Mag. The 175 is the heaviest factory match data that I could find. The federal website lists .496 for the BC and MV appears to be 2600. That produces an impact of -415. That would be within the 15 mils of elevation but puts me out near the edge. I assume that a 10 MOA base would put me back in a somewhat better optical are of the scope. Does that make sense? The 1000 yard would not be a common use so I don't want to have to dial down too much for routine shooting because of too much cant. Does this make sense or would I just be better off with 0 degrees on the base?
I used the calculator at www.handloads.com. The 190 data was, upon second look, for 300 Win Mag. The 175 is the heaviest factory match data that I could find. The federal website lists .496 for the BC and MV appears to be 2600. That produces an impact of -415. That would be within the 15 mils of elevation but puts me out near the edge. I assume that a 10 MOA base would put me back in a somewhat better optical are of the scope. Does that make sense? The 1000 yard would not be a common use so I don't want to have to dial down too much for routine shooting because of too much cant. Does this make sense or would I just be better off with 0 degrees on the base?
Re: How much base cant
As a general rule, you take the total elevation travel on the scope and divide it by 2...and that is close to what cant base you need to maximize the scope.
For example if your scope has 45 MOA of elevation. 45/2 = 22.5. So that would mean a 20 MOA base.
As a general rule, you take the total elevation travel on the scope and divide it by 2...and that is close to what cant base you need to maximize the scope.
For example if your scope has 45 MOA of elevation. 45/2 = 22.5. So that would mean a 20 MOA base.
Re: How much base cant
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: vkc</div><div class="ubbcode-body">As a general rule, you take the total elevation travel on the scope and divide it by 2...and that is close to what cant base you need to maximize the scope.
For example if your scope has 45 MOA of elevation. 45/2 = 22.5. So that would mean a 20 MOA base.</div></div>
so on a NF with 100 MOA of travel we need a 50 MOA cant??? Don't think so.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: vkc</div><div class="ubbcode-body">As a general rule, you take the total elevation travel on the scope and divide it by 2...and that is close to what cant base you need to maximize the scope.
For example if your scope has 45 MOA of elevation. 45/2 = 22.5. So that would mean a 20 MOA base.</div></div>
so on a NF with 100 MOA of travel we need a 50 MOA cant??? Don't think so.
Re: How much base cant
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mlw</div><div class="ubbcode-body"> As best as I can calculate (I'm a novice at this) with a 168 grain round the 15 mil up elevation available in the scope would be enought to compensate for drop. </div></div>
To clarify, are you saying that your SS has built in cant or you range in elevation is +15 mil?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mlw</div><div class="ubbcode-body"> As best as I can calculate (I'm a novice at this) with a 168 grain round the 15 mil up elevation available in the scope would be enought to compensate for drop. </div></div>
To clarify, are you saying that your SS has built in cant or you range in elevation is +15 mil?
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