Armory, Self Defense, And EDC > The .22 Caliber Rifle: An Essential Homestead Firearm

Odds and ends for my 2018 shooting recreation

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archer:
let us know how those setups work.

NWPilgrim:
While perusing videos on setting up scopes I came across one by NSSF with a former sniper instructor.  His quick and easy way to level a scope is to use a metal bar across the receiver bridge, and hold one edge down and pivot on it to raise the other edge up to the flat spot on the bottom of the scope.  If the scope is not yet level than one side will be raised above the edge.  Just rotate it until the top edge of the bar fits evenly across the bottom flat of the scope.  No need for levels and such.  this was a new technique for me and seems very effective while also be extremely easy to perform.

Not all rifles have a flat receiver bridge, and not all scopes have a bottom flat area.  Leupold does for sure.  But if you have the right combo then this is a quick and easy leveling tip.  Works really well with Picatinny rails.  I actually used a blade on a Tri Square.  Better of the metal was thicker but it worked OK enough.

Here is a summary of the set up steps:
1) Install bases and bottom portion of rings. Lay scope in rings and loosely attach top portion of ringst o hold the scope but still allow movement.

2) Position scope forward/aft as needed.  Try in various shooting positions to make sure you move it so there is no "black ring."  Usually shooting from bench or prone your eye will be closer than when shooting from standing or kneeling.  Find the optimum location that works for all your positions.  Tighten the scope rings a tad to hold the scope in place but allow it to rotate.

3)  Level the scope according to above description using a metal bar across the receiver bridge.  Tighten the scope rings down to specified inch-lbs (about 20).

4)  Focus the diopter/eye piece so that reticle is sharp.  Look at the sky or blank wall to rest your eyeball focus for distance, then quickly look through the scope and if cross hair is not in focus give the diopter ring a bit of a turn and try again.  If you stare at the cross hair for a time your eye muscles will force it to focus, so you want just the initial glance.  the diopter only focuses the crosshair, not the object viewed.  The objective lens is set for a certain distance to be in perfect focus (100 or 150 yds for centerfire scopes, 50 or 60 yds for rimfire, 75 for shotgun) and the magnification selected will determine the depth of view that is in acceptable focus, maybe 35 yds - infinity.

5)  If you have a collimator you can now attach it to the barrel and roughly adjust elevation and windage for bore sight to get on paper.

6)  At the range.  If you have side focus or Adj. Objective you can focus that for the distance of your target.  Normally want to do initial sighting in at 25 yds or 50 yds to get on paper and then zero.  If you did not use a collimator then bore sight to hopefully get on paper.

AR15s are often sighted in for 50 yds which will give a maximum point blank range out to 225 yds or so depending on the ammunition.  This also works out to be approximately 2 inches high at 100 yds.  Supposedly the ideal distance for sighting in rimfires is 75 yds. which is just over an inch high at 50 yds and about 1.5" low at 100 yds. Check the ballistic tables/graph for the bullet and velocities you will be using to sight in.  Shoot a couple of rounds, make scope adjustments to elev. and windage knobs, shoot a couple of more rounds.  Repeat as needed until you are on the bullseye or at the height above the bullseye you want.  I then fire at least 2-4 targets of 5 rounds each to confirm.  Then check again at a longer distance of 100 yds, 200 yds, and the max distance you plan to shoot.  Either note the scope settings or the crosshair offset for distances beyond your sighting in distance.

Again: Find best front/back position for full view through scope in normal positions; level the scope; focus the eyepiece for the crosshairs; (focus the target with the AO or side focus); shoot and adjust elev/wind. to get on target for your sight in distance.

There is a ton of information on scope set up and tips on rimfirecentral, snipershide forum and YouTube, for instance.

I am excited to try out the redneck objective lens focus technique on my fixed parallax scopes on the rimfires.  Should be going out this weekend to sight them in and index the parallax settings.

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