Pretty much what Octagon said. Sounds like a fitment issue. Either live with the reduced recoil management or find a gun that fits you better if you want to keep sinking your finger in that deep. Personally I think you should try learning to shoot with less finger and work on establishing a solid grip.
I strongly suggest looking into good quality one on one instruction on this. I don't have the biggest hands in the world and shoot my G19 using the part of my finger directly behind my fingernail. Not quite to the tip, but pretty close.
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