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Customizing a firearm is nice, if done correctly. I don't know how a comp would make a pistol better for target shooting. If anything else, it could make it worse.
I have found that (when on the range) if I load 5 rounds in a mag, I shoot better and I don't waste as much ammo. I am "forced" to take a break to reload mags and have a chance to see where I am putting rounds on the paper. Keeping track of 18 +1 rounds is too confusing for this old head.
One of the best things I have found that have made my handguns better for target shooting is practice. The more I practice, the more the pistol "breaks in" and seems to work better.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT