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GunNut
Posts: 7,642 Senior Member
Speaking of rimfire scopes... Adjusting parallax in centerfire scopes for rimfire ranges
GunNut
Posts: 7,642 Senior Member
Many of my .22s are not expensive guns. They are old Mossbergs and such, and they don't really have a very demanding life but the one thing they all have in common, they are all VERY accurate or they don't last long on the rack. So except for the high end guns that get the pricier glass, the rest of them get inexpensive scopes, especially as my aging eyes struggle more and more to see those diminutive iron sight.
A few weeks ago I scored a batch of Korean Bushnell Sportsview scopes that also came with a bunch of guns (that's another story). A great score because they are one of the EASIEST centerfire scopes in the world to adjust parallax on to make them .22 friendly. I'd thought I'd share how.
As you can see in the picture the bell of the scope (contains the front lens) has a "locking" ring at the end of said bell. All you have to do is remove this ring (you can use a strap wrench if it's really tight or one of those rubber jar lid opening thingies) to expose the threaded carrier which is how the factory sets parallax on them. You can use a flat metal, well just about anything works including my metal ruler and the wife's nail file, between the two notches of the carrier to turn it.
Place the gun on a secure rest and aim at a target at your preferred rimfire distance. I like about 25-35 yards. Screw the carrier in and out until your target is nice and sharp focused and then move your head around and fine tune so there is as little movement of the crosshairs around the target as possible. relatively small adjustments go a long way.
Put the ring back on when you're satisfied and you are done, you now have a rimfire scope. Procedure is pretty much the same for just about any scope out there. Only gotcha is do NOT unscrew the lens carrier all the way out. The nitrogen in the scope is now gone and it will fog on you.
Here's a 10/22 I jut finished ready for a range trip.
Anyway, that's it! Here's more detail on the how to in this short article if you need it.
https://www.mcarbo.com/store/pg/33-adjusting-parallax-on-non-ao-scope.aspx
A few weeks ago I scored a batch of Korean Bushnell Sportsview scopes that also came with a bunch of guns (that's another story). A great score because they are one of the EASIEST centerfire scopes in the world to adjust parallax on to make them .22 friendly. I'd thought I'd share how.
As you can see in the picture the bell of the scope (contains the front lens) has a "locking" ring at the end of said bell. All you have to do is remove this ring (you can use a strap wrench if it's really tight or one of those rubber jar lid opening thingies) to expose the threaded carrier which is how the factory sets parallax on them. You can use a flat metal, well just about anything works including my metal ruler and the wife's nail file, between the two notches of the carrier to turn it.
Place the gun on a secure rest and aim at a target at your preferred rimfire distance. I like about 25-35 yards. Screw the carrier in and out until your target is nice and sharp focused and then move your head around and fine tune so there is as little movement of the crosshairs around the target as possible. relatively small adjustments go a long way.
Put the ring back on when you're satisfied and you are done, you now have a rimfire scope. Procedure is pretty much the same for just about any scope out there. Only gotcha is do NOT unscrew the lens carrier all the way out. The nitrogen in the scope is now gone and it will fog on you.
Here's a 10/22 I jut finished ready for a range trip.
Anyway, that's it! Here's more detail on the how to in this short article if you need it.
https://www.mcarbo.com/store/pg/33-adjusting-parallax-on-non-ao-scope.aspx
Replies
How easy it is to make people believe a lie, and [how] hard it is to undo that work again! -- Mark Twain
follow these steps
1. The reticle should be clear (focused) before
adjusting the parallax. If it is not, follow the
instructions under “Focusing the Reticle.” See
pages 8 & 9.
2. With the firearm in a stable position, look through
the scope, concentrating on the center aiming point
of the reticle.
3. Move your head slightly up and down while turning
the adjustable objective ring until the reticle does
not move in relation to the target.
Note: By estimating the range to the target and using
the numbers on the adjustable objective ring, you
can get your parallax adjustments close to the proper
setting before assuming a shooting position.
https://www.redfield.com
You can find a manual at their website. You might not find your exact manual but when it comes to adjusting parallax using an external knob, most seem to be pretty similar.
The process mirrors what's laid out in this article.
https://www.thetruthaboutguns.com/scopes-beginners-parallax-adjustment/
Use can use the knobs to get you in the ballpark but you'll need to do the rest yourself using the process described above. (In the manual and in the article)
How easy it is to make people believe a lie, and [how] hard it is to undo that work again! -- Mark Twain