For practice I use whatever is cheapest, but for serious, I use DoubleTap 124g Gold Dot +P. They feed reliably, and are within limits of +P pressure, but give near .357Sig performance. Accuracy is very good, too.
I bought a good supply of this ammo before the rush, and I don't know if DoubleTap is currently able to get the 124 Gold Dots. I'm sure the velocity and muzzle energy are similar, and I know whatever bullet they are using will be a good one.
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