I used to shoot IDPA. I stated the club in Brunswick, GA. When I shot SSR I used a 5" M625 with full moon clips and handloaded 125,000 power factor ammo. My goal was to not only win SSR but to be HOA. I was almost always near the top OA. Then the rules changed. I had to acquire a 4" M625. I recently tried the SL Varient speed loader. They are available at bobmacs.com. I like the SL varient much better than the HKS. The SL Varient will acomadate 44 mag., 45 AR, 45 Colt, & 454 Casull. I believe that when loaded with round nose bullets in 45AR, SL Varient makes a winning combination in IDPA SSR. Of course one would have to handload down near the current power factor of 105,000. For ESR one could use the same revolver with full moon clips loaded with 165,000 power factor 45 ACP ammunition.