These are cool speedloaders for the 686 Plus. The plastic ones are sometimes faulted for being thin due to the 7 round configuration. These Five Stars are made of aluminum and seem sturdy enough:
5 Star is the only brand of speedloaders one should be buying.
The shape of them does not effect performance or cause damage to my custom grips. I can see some grips that have high grip overhang causing issues but even with those large wood grips on one of my .500s the rounds load in freely.
Not a single other brand can match the quality or performance of 5 Star speedloaders.