"Both fireams and any loads you shoot will start showing you they work or not as near as 10yds."
I respectfully disagree with this comment. At 10 yds,, many guns will NOT show their true potential or failures. As a serious handgunner,, including handgun hunting for over 4 decades,, and having taken well over 100 whitetails & numerous animals with a handgun,, 10 yds is NOT the way to determine the accuracy potential of anything.
For most of the true handgunners of a more serious nature,, (IHMSA, hunters & others,) we START judging a load/firearm combo at 25 yds. After that,, we move to 50 yds or 100 yds. We look for groups, keyholeing, and overall performance. If the gun & load don't perform,, then we try different combinations.
A little over a week ago,,, I had 3 guns,, and using identical ammo,, I shot at 25 yds to check the performance in each one with that ammo. One gun,, 15 rounds, and I had a boringly tiny group measuring 1"x 1-1/2". That gun really liked that ammo. The next gun,, a totally different design,, shot a respectable 4" group of 15 rounds. The group actually measured a little under 3" except I did have 3 rounds that opened up the group. The 3rd gun,, which was also a different design,, and shooting 16 rounds,, had a shotgun looking pattern. About a 12"-14" group. About 7 of those rounds were tumbling as they hit paper. It hated that ammo.
And just for kicks,, I took that worst shooting gun, and more ammo, & shot 8 rounds at 15 yards. The group was actually about 6"x6". If I had moved closer,, I'm sure it would have appeared to be a much better shooter than it was.
What that showed me was that gun #2 may benefit from a bit of tweaking, while the 3rd gun will require a totally different loading. Gun #1,, will get more testing at 50 yds next with the same ammo.