Sharpen Your Hatchet While The World Screams

Thursday, February 8, 2018

Adventures in Rimfire Pt. 4

The Ruger American I call SK2.0 is still in progress. In a previous post I showed how well it shot with a few modifications and decided it deserved better optics and a restock in something more ridgid. So, last week I ordered everything I needed to reglass it. I found a slightly used Primary Arms 4-14FFP mil/mil scope on an auction site (Primary Arms shows none in stock on the mildot version) and had it sent. My DIP 25MOA base, Vector low rings and the scope arrived today. Scope is very bright, focus works well and reticle is sharp. I put the rifle in my vise with a towel to protect it and then installed the base with blue loctite. 

I then leveled the base with the level in my phone and retightened the vise. It is important that the scope not be canted in relation to the rifle because as you dial elevation your rounds will go to one side or the other. It is quite amazing how well the phone levels work. Whatever level you use, be sure to orient it the same way when leveling the base and then scope in case there is some error. As long as the level is oriented the same way any error won't matter as it will be the same for the rifle and optic. 

I had previously put the rings on the scope and set my eye relief to where I wanted by positioning the scope fore and aft where the image was clear and my cheek was in the proper position on the stock. I installed the whole assembly on the rifle and slowly began to tighten everything down while I made sure the scope stayed level with the rifle. I went from screw to screw in a pattern multiple times until everything was tight. 

I like it a lot. This scope and canted base should allow me to shoot anywhere from close to as far as .22lr is capable. Now I need to choose a stock for it.

A word on scopes. For dialing out to longer ranges, a scope with a mil reticle and mil adjustments is the only way to fly. Having the reticle match the adjustment is important. Non-matching reticle/adjustments would be like measuring a 2x4 with inches and then trying to cut it in millimeters, math is required and it's just silly. Don't buy a mildot scope with MOA Turrets. 

If a variable, a FFP (first focal plane) scope is what you want. A FFP scope keeps the reticle the same in relation to the target no matter what power you are using. Range a target on 4 power or 10 power and the range is the same. SFP (second focal plane) scopes must be used on the highest power (or the power the manufacturer determines) to be accurate for ranging or elevation/windage correction using the mildots. In a SFP scope the reticle stays the same size in the scope at all powers. In a FFP scope the reticle grows and shrinks with power changes. 

FFP scopes are getting easier to find. Take the time to find one you like with a mildot reticle and turrets and either side focus adjustment or adjustable objective. On a rimfire a way to remove parallax with either of these focus adjustment methods is critical to be able to shoot accurately from short range to long. 

Now Boyds Pro Varmint or AtOne stock.... 

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