I am grateful for your thoughts and comments. I ask about this powder and these loads because they are not published anywhere and I have not yet tested them—I wished first to get feedback. Please note that N100 is different from N100 NF, and Accurate shows appreciably different powder charges in their published loading guides. Below are charges I propose using in batches of light target loads. Please tell me if they seem problematic regarding failure to cycle semiauto action or failure to exit barrel due to in-sufficient velocity. There is little data about minimum loads of Accurate N100 NF. I based these extrapolations on Accurate’s latest published material and many other sources.

45 ACP. Mixed cases. Federal Premium Large Pistol Match primers. Light taper crimp.
4 gr N100 NF [4 gr applies to all bullets listed]
- 155 gr. Lead: Missouri Bullets IDP #10-Grooveless #HT-452155GL .452” Diameter 155 Grain SWC FB – Grooveless Brinell 18 Hi-Tek 2-Extreme Coating from J&M Specialized Products P/L
- 185 gr. Jacketed: Magnus J-187, .451”

44 Magnum. Mixed cases. Federal Premium Large Pistol Match primers. Light roll crimp.
5 gr. N100 NF [5 gr applies to all bullets listed]
- 145 gr. Lead: Matt’s Bullets Model 430-145-RN .430” Round Nose
- 165 gr. Lead: Missouri Bullets Cowboy #12 #430165CB 430" Diameter 165 Grain TCFP Brinell 12 for Cowboy Action Velocities
- 180 gr. Jacketed: Sierra 44 Mag 3500 .4295” diameter 180 gr. hollow cavity

357 Magnum. Mixed cases. CCI 500 Small Pistol primers. Light roll crimp.
3.5 gr. N100 NF [3.5 gr applies to all bullets listed]
- 105 gr. Lead: Missouri Bullets Cowboy #16 - Hi-Tek #HT-358105CB .358" Diameter .38 Special 105 Grain TCFP Brinell 12 For Cowboy Action Velocities Hi-Tek 2-Extreme Coating from J&M Specialized Products P/L
- 110 gr. Jacketed: Hornady XTP #35700 38 Cal .357” 110 gr. XTP

Please do not suggest a different powder until after I have burned through 8 lbs. of N100 NF… which’ll take a while. I am aware Trail Boss is fabulous for light loads in large cases.
I did not find N100 NF loads published by Accurate for 44 Special. Also, one generally does not find minimum/light loads published for magnum cases. 45 ACP has plenty of data, many 'starting loads,' but not much in minimum loads below the starting loads—loads that have enough power reliably to cycle the action & push bullet out the barrel at 700+ fps.
I believe standard primers are adequate for light charges of fast powder, but I could switch to magnum primers if there are reasons.
Incidentally, if you know good inexpensive sources for the very lightest lead or coated lead bullets, or other extremely light bullets, please let me know.
The handguns include 45 ACP Colt Mark IV Series 70 5”bbl; 45 ACP Kimber; 44 Mag S&W Model 29 8”bbl; 357 Mag Dan Wesson 8” heavy bbl.
We have adjustable sights on all weapons and can accommodate somewhat the changed point of aim for light loads. Large targets are at 7m, 10m, and 15m.
At the unmanaged open outdoor range, we routinely hold handguns pointed up before shooting, thus I believe the small charges of powder will flow back to rear of case near primers, thus optimizing ignition.
I am teaching inexperienced friends—men, women, teens—about shooting; they are motivated learners, and I believe will learn faster and flinch less with mild ammo at the beginning.
Also I have medium power and full power loads for them to use after they are familiar with functions and feel of the weapons.
MANY THANKS for sharing your thoughts and recommendations about loading Accurate Nitro 100 NF powder.
Miles

call accurate, they will help you.

I did a quick search there is plenty of helpful info out on the web,

If you can't find the exact bullet info you want find a similar weight one.

As long as you are loading on the low end you should find a lot of cross over data.

Shotgun powders generally make good handgun powders.

Call them (Western Powders) I think you will find the ballistician helpful.