hmmm...
I've been using HKS speedloaders since the 70's and never-ever had one spill its contents; can't say the same for the Safarilands I have.
I currently have HKS for wife's M38 (two), a dozen or so for the GP100s, ten or so for the 357 Redhawks, and eight for the 41 Redhawk and 12 for the 44 Redhawk.
And one for a Colt, too, I think.