Thad; here are 10 generally accepted ways that you know you are loading 'too powerfully.'
10: Other shooters, wearing ear plugs AND muffs, move away from you as far as they can.
9: You have to pound the bullet in with a mallet; even then, with a heavy crimp, you have to shoot the cartridges within 24 hours as the bullets keep creeping out.
8: The muzzle blast of your pistol prompts a visit from the fire department.
7: The rimmed ammunition you are loading comes out of the revolver rimless.
6: The rimmed ammunition you are loading comes out of your revolver not only rimless, but lacking the entire case head.
5: You try lead bullets, and your target appears as if shot with a shotshell and #12 shot.
4: After the first 50 rounds through your pistol, you discover the rifled bbl. has become a smoothbore.
3: Despite a mighty grip, your pistol tends to land about 30 feet behind you with every shot.
2: You shoot some factory ammunition, and find yourself going through the 'hangfire' drill everytime, despite holes in the target.
And, with apologies to David Letterman,
The #1 reason you know you are loading 'too powerfully':
When you take up your position at the range, the range masters start erecting splinter shields around you.
Walt