Hey Shooters!
Got a quick tip for you that I don't think anyone uses...but it sure helps me.
Check the photo below.

Put one like it in your phone!
What you are looking at is a target representing exactly what my rifle and load combination does downrange. Once I "pair-up" a rifle and a load, I take one target and shoot that target at all the distances available at my local range. As you can see my Rhino Arms rifle shoots rather well paired with Freedom Munitions 55Vmax Remanufactured ammo!

A solid combination!
Now I have a visual sample of where I hit in relation to my aiming point. In this case the Burris AR-1X sports a 4.5 MOA center dot (with several horizontal marks at 400, 500 and 600 yards). Using just the center dot and holding ONLY in the center of the target at all distances (50, 100, 200 and 300 yards) I know where my bullet impacts in relation to that dot. Note that in the photo (kept in my phone for match day reference) the Dot is shown in increasing size as it does in relation to the target.
I have several of these targets on hand for different load and gun combinations. Not only are they good for match day memory lapses, they let me verify a current zero and/or re-zero after a scope swap.
There you have it: a simple tool that only takes about an hour or so to do.
Don't say I didn't tell you!
Yours in Sport
Patrick
Related

Meet Patrick E. Kelley
Competitor, Instructor, Gunwriter, Photo/Videographer.
Patrick began shooting at the young age of six, but did not enter into the competitive shooting sports until he was 27, where he won the first match entered.
Since then he has earned numerous first place finishes at major matches in 12 US states and Canadian provinces, including two Gold Medals at the Pan American Shotgun Championship in 2013. He has mastered several shooting disciplines, from NRA Bullseye and Metallic Silhouette to the world of Practical Shooting. Patrick is also a member of the NRA 2600 Club and was ranked in the USPSA’s top twenty early in his shooting career.
Patrick’s deep seated interested in firearms has led him well beyond basics of routine maintenance into gunsmithing and competion tuning. Handloading and bullet casting were an integral part of Patrick’s competition shooting advancement.
Patrick's articles on shooting and firearms, as well as his photography can be found within the pages of Shooting Illustrated, Outdoor Life and 3-GunNation Magazine. As a friend of law enforcement he is a volunteer trainer for his local Tactical Response Team. In concert with the NRA he produced the exhibition shooting video series “Patrick's TacTricks”, and when time allows he plays the piano.