I owned a shield 9mm that didn't like anything 147 gr. It had several stovepipe malfunctions. Didn't bother me, because it ran everything else just fine. I carried with Speer Gold Dot 124 +p and never had a hiccup with that ammo at all. It shot the Speer's great. I just figured the 147 gr and the shield didn't mix, so I shot what it liked and didn't bother with 147 gr.
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