I came to an interesting conclusion yesterday while at the range. Finding the "best" load for my handguns are a waste of time and money.
I should be finding the worst loads so I can avoid them.
Any decent load is capable of shooting better groups than I can without a rest. I don't practice from a rest since I will not have one available when I need the gun for serious purposes. After years of serious practice, I have finally reached the place where I can depend on my skill level to put my rounds into a decent group at the distances I need to be good at (basically the distance from my bedroom door to the middle of the living room where the front door is located).
Any standard full power load will be more than accurate enough to do that.
I have found that my guns don't care what powder I use as long as the bullet/boolit is traveling the speed it needs to go to stabilize properly.
38 Special at 850fps. 9mm at 1100fps. 45acp at 850fps. All of these are easily achieved with standard loads in standard handguns.
They invariably give great accuracy no matter what combination of powder, primer, or style of bullet/boolit I am using that day.
Yesterday, I took several different loads to the range to test. Boolits in standard weights in several styles, all of which were loaded to standard velocities with any of several different powders.
All of them shot well.
The only times I have observed poor accuracy have been when I was using non standard loadings, either +P or very light loads. Either of those has the ability to take you out of the reliable area of your gun's performance.
I realized that loading in the "classic" area for any given cartridge usually produces consistently good results. You can argue about design parameters and twist rates to your heart's content. There are good reasons the best loads are "classic".
There is nothing magical about these loads. They simply achieve the standard velocities at standard pressures in standard guns. Any powder and projectile that gives you this combination will work.
Even specialty guns are designed to shoot these same classic loads well.
When you get into non-standard/custom firearms the rules change and so do the loads. I am not talking about those.
I realized that searching for that perfect load is not something I need to worry about. Improving my skill level and consistency is far more important than trying to find a magical load that may only be marginally better than standard loads.
What this all boils down to is this. Don't try to "buy" a better shooting load. Make yourself a better shooter. The results are always better when you are a better shot.
With proper training and practice techniques, you can become a better shot. It took me years to get to the place I am now. I am not and never will be a great shot. I am more than adequate for my intended purposes. I am going to keep working to get better.
My standard loads will get me there.