I used to have a S&W 19 357mag. k frame, great gun a little light for the heavy recoil. I bought it with a 6 barrel change over to 8 inch. That reduced the kick. I had a carry permit for it while prospecting, which is very rare here in Canada. I eventually got rid of it as the government kept upping the amount of paper work required every year to keep the permit. Here in Canada a handgun is considered a restricted weapon which is controlled by the federal government. The provincial government only controls the hunting regulations. Handguns are not allowed for hunting anywhere in Canada as far as I know. The new law ( believe its in force now) concerning handguns is you can't buy one. If you have one you cant sell or give it way, can't even pass it down thru your estate.Making a speed loader for a 500 magnum would be challenging to say the least. I look forward to your progress.
The first time I used a speed loader was during one of the many competitions I got involved in at my club.
They were quite clunky at first but I soon got comfortable with them.
The older I get the more I like revolvers and 1911's. The plastic guns just don't get me all warm and fuzzy. I do have a CZ Rami in 40 Cal. All steel pistol, no plastic.
I sure do miss my model 19, K frame, S&W 38 Special. It was my favorite revolver. My dad had a Ruger Black Hawk in 45 Colt. That was sweet too.
Great shooters.
I think there are some exceptions for competition shooting, and if your occupation meets certain requirements.