Funny that the Dynapoints shoot well for you, I've tried them in my BRNO 611, my Savage 24 and my 6" AMT handgun and they were just lousy in all three, there also was a small cloud of smoke after each shot with Dynapoints from the AMT. The velocity of the Dynapoints was very poor, though I don't now remember the numbers, but that was the only ammo that wouldn't function in the AMT. I thought they would be good for edible game, like the old .22 Winchester Rimfire, however the poor accuracy from my guns rules them out for any use at all.
The best price I've found on WMR ammo is the Fiocchi brand from Grafs, about 2/3 the price of CCI. They make only the 40 grain but in both hollow point and flat point and it shoots very well from all of my guns, not quite the best from any but a close second from all. The only way to know what is best in your rifle is to try them all and there are now so many types of .22 WMR ammo that testing can get to be a bit costly, you may spend more on ammo than you paid for the rifle! But that is a good thing, more choices means more chances for one to prove exceptional, or you may just try one or two and call it "good enough".
I've tried 30, 33, 34, 40 and 50 grain bullets and all I can say for sure is that the point of impact changes greatly with different bullet weights.