Can anyone recommend a speed loader for the Response Mags?

I don't see why a standard MagLula Uplula pistol loader would not work. While they are not cheap, they are very well made and they are invaluable for loading many high capacity pistol magazines. They are pretty much the standard and the best of the breed. If you get one, make sure you mark it with your name or initials because they have a way of getting "borrowed" at the ranges. Uplula 9mm magazine loader, universal pistol magazine loader

+1 on the MagLula. I am going to disagree slightly with mckenney99 about the price though. At $35 or so they may not be dirt cheap but I do not consider them expensive. Absolutely worth the money.

I got 2 of them. Misplaced the first I bought during our move. Bought the second to use and eventually found the first. They work great.

That's the one you need.

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The best I can with what I got

I don't know if I would call the MagLula a "speed loader" but it certainly can be called a thumb/finger saver! And it works with numerous magazines.

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So many S&W's, so few funds!!