Everyone wants the easy button and the industry has listened. Scope manufacturers have designed series of scopes known as BDC or Bullet Drop Compensation Reticles to accommodate the easy button request of shooters.
The idea is that the reticle inside the scope already has Bullet Drop built in it, so just pick up the rifle and shoot your target at given distance. Rimfire BDC scopes are some of the most common scopes in the world. Everyone has an old 22LR sitting in the closet or in the gun safe and it would be so handy if a scope did all the work for you. Allowing for you to pick up some cheap ammo from the store and hit the range or timber.
Pictured is a Rimfire BDC Reticle here is how you are educated on how to use it.
Are Rimfire BDC Reticles a Lie?
The short answer is No - They are not a lie, but they are very misleading.
Manufacturers have to make products that fit the masses. They can't make one-off scopes for each person with their pick of ammo and gun combo that is out there in the world. So they have compiled data on what is the most common ballistic performance of 22's on the market and developed their reticles to get you in the ball park.
Wait... So how does it work for me?
There is a high likelihood that your BDC Reticle is lying to you. Here why -
Real World Rimfire BDC Usage
Do I need to throw away my Rimfire BDC?
NO! It still can be used and used effectively.
Here is how the above BDC Rimfire Reticle performed on one of our CZ457 Varmint Rifles, 20.5 inch barrel. Using SK Standard Plus 40gr 22LR Ammo at the factory prescribed scope magnification.
As you can see if we would have just take the values given to us from the manual we would would never be able to properly engage the target with our Gun and Ammo combo if we wouldn't have tested out real life performance.