With NO Exposed Spring you were using Safariland Comp III's. They are not real hard to find. Midway has them on sale now and again.
They are manufactured in 2 sizes ONLY.
K Frame 6 shot 38/357
L Frame/GP100 in 6 shot 38/357
The EXPOSED Spring Speed Loaders will be Jet Loaders. They are a little better quality than the Safarilands, and also more expensive. They are available from Power Custom, as well as Pistoleer.
They come in 3 sizes ONLY
J Frame/SP101 in 5 shot 38/357
K Frame 6 shot 38/357
L Frame/GP100 in 6 shot 38/357
You have some other considerations, such as Speed Loader Carriers. Check the Rules of your sport.
Safariland still makes the Model 333 Carrier. It carriers 3 speed loaders side by side. It is available in 1.5 Inch as well as 2.25 Inch Duty Belt size.
The Safariland is NOT IDPA Legal. It is good to go for most other Revolver Games however.
For IDPA Legal you have a few choices.
North Mountain
Blade Tec
I make the Big Creek Kydex Carriers
I believe their are atleast a couple more makers.
Your Model 66 would be a good choice. You may need to do a grip change for speed loader clearance. I am using Hogue Rubber on both my Full Size Revolvers. My main 2 Match Revolvers are a 64, and a 686. I am running the more expensive Jet Loaders in the K Frame due to them being a little smaller in diameter. The K frame cylinder clearance is pretty close. I am sure you can do fine with Safariland Comp III's also.
Your 28 being an N Frame limits your choices some. You will be limited to the HKS and 5 Star "Turn Knob" Speed Loaders.
Something to consider. I have been using the HKS Speedloaders for 40 years. They are pretty good, and made for lots of different revolvers I own.
The 5 Star Speed Loaders turn BACKWARDS of the HKS to activate. If you have never used Turn Knob Speed Loaders you will not have an issue using the 5 Star.
Next issue will be the Carrier. As far as I know, Big Creek Kydex is the only source for carriers for anything other than the K and L Frame speed loaders.
I have examples of almost every HKS, Safariland, and Jet Loader made. I do not have 5 Star speed loaders to check the fit, and to make forms.
I have made carriers for the 5 Star, but I had the Speed Loader sent to me to get the fit right. I believe that was for a 5 shot LCR Ruger.
My guess is that you will save between One Half and a Full Second on a spring driven speed loader reload over a turn knob reload if you practice with both, and get good.
Next issue is Bullet Shape. Use a Round Nose Bullet.
Have Fun
Bob R
Big Creek Kydex Speed Loader Carriers
[email protected]