Rifle Scopes Scope Question

[viva la figa]

How do I work out what angle I need on my scope rail? I have a Ruger 10/22 I am using as a trainer and have an Athlon Argos BTR 6-24x50 off the top of my 300 win mag.

I ordered a 15 moa rail but they sent me a flat 0 moa rail. Is it worth returning? I have a 20 moa rail on my 300wm...as that seems to be the going rate. Not sure how to calculate what the .22 needs

Thanks for your help!

 

[Steel+Killer]

You do realize the whole point in a angled rail is to give the scope more up elevation so you can dial longer shots when shooting long range right? I can't imagine your shooting a 22LR far enough to where you would need any MOA rail. As far as calculating what the 22 or any cartridge needs. You could use a Ballistics program put in your data from your setup look at the elevation it says to come up at the furthest range you plan on or can shoot at and then see if your scope will allow that much elevation to be dialed into it.

 

[SubOptimal]

Get a ballistic calculator, JBM is free, and calculate the drops in MOA to the ranges you will be shooting. When the required MOA adjustment exceeds that available on your scope, you can decide how much tilt you need.

BTW, Palmetto-Pride, a 22 needs just as much tilt at around 300 yards as a his 300 WinMag does at 1000. Many use angled rails on their 22s.

 

[viva la figa]

Thanks Suboptimal. I dont plan to shoot out past 250yrds or so. according to Strelok.....at 400yrds I need 16.86 MRAD and my Athlon Argos BTR 6-24x50 scope has 16Mil of adjustment.

Is there much reason to shoot out past 400yrsd with a 22lr? I cant imagine there being days with little enough wind to even be able to attempt that shot!

Does anyone hunt varmints with 22lr past that range?

 

[viva la figa]

please double check my numbers I am calculating a BC of .138, muzzle velocity of 1255fps, and a 40gr bullet (Remington solid lead round nose). AM I getting the correct answer?

 

[spife7980]

The argos has 18 mils according to their website. Thats 9 up and 9 down.

Putting the canted rail under the scope shifts its "zero" point converting the otherwise useless down elevation into up. A 20 moa canted base is 5.93 mils. Lets round that to 6 for ease. If you were to put that 20 moa (6 mil) rail under your scope that would mean you have 9+6=15 mils usable up elevation (with 9-6=3 mils down). You dont want to take the scope to the maximum of its elevation adjustment, keep it off the bottom a bit as performance can suffer on the extreme edges. Plus your zero wont be in the exact center of the scopes travel so you dont want it so close to the edge of travel that you couldnt get a zero.

My match 22 rifle shooting black eley will go to 340 yards with 15 mils of travel according to my calculator. For the flat rail you will have the normal 9 mils which would get you out to 240 yards.

Now, are people hunting varmints that far out with a 22? Maybe, I know Ive shot rounds off at birds and rabbits that far but never with a realistic expectation of hitting them, more just for shits and giggles. For actually shooting critters I wouldnt go much further than 100 yards with a 22. Milk jugs and stuff sure, 300 yards can be a good way to occupy some time.


Personally I would make them take it back and give you the right rail because what you ordered is what you ordered and you shouldnt have to suffer for their fuck up.
I would match whatever rail you have on the winmag to make swapping it between the rifles less adjustment and thus easier and less likely to get mixed up in the middle of the two.

 

[viva la figa]

Awesome explanation!!! Thank you for being so helpful!