Well, I finally got my Mrs. Norton Christmas present chronograph out to the range. Took a while to find a tri pod. I'm kind of cheap, found one at an "Antique" store for $10. Results Average of 6 shots each In .45 ACP-Glock 21 200 grain Rainer h/P plated bullet-4.6 grains bullseye-786FPS .45 ACP-S/W 325-same load-715 FPS .45 Colt 200 Gr. RNFP lead bullet-6.0 grains of trailboss-709 FPS I did find my precharged air gun was very consistent. Of course I don't reload for it. .177 lead pellet 1054 FPS It seems my .45 ACP loads are about where they should be according to the Lyman Handbook. My .45 Colt readings were erratic. From a high of 753 to a low of 689. I need to switch to the rifle powder bar for the Trail Boss. I knew my powder charges were not consistent. The weather today was overcast, and very hot and humid. I shot as always, outdoors.