I'm leaving the heavy spring in as I feel it "enhances" relailability especially when stripping ctgs. from the mag. I also feel it lessens slide/frame battering
As you wish...
BUT...
You're trading one aspect of reliability for another. Overspringing the slide is the leading cause of that ol' debbil "Limp Grip" malfunction, with can cause failure to eject and failure to feed. It can also lead to Bolt-Over Base misfeeds...aka "Rideover if the mag spring isn't up to par.
As long as you have a solid, two-handed grip on the gun, the first two will probably never be an issue, though the risk of a Bolt-Over misfeed remains.
BUT
If the day ever comes that you can't get that solid hold, and you're forced to claw for the gun inb a panic and shoot one-handed with your wrist bent...it may well become a problem.
If the gun is right, it will strip, feed, and return to battery with a 10-pound spring. Whenever I tune a pistol for feed reliability, my litmus test is to remove the recoil system, and feed a magazine full through it by pushing the slide to battery with the tip of one finger. If it fails even once...I know I've still got tweakin' to do.
A heavier recoil spring also stresses the slidestop crosspin, lower lug, and the slidestop pin holes in the frame. Whenever I see a modern 1911 with egg-shaped holes in the frame, I know that either the gun has been badly oversprung, or it's just flat been shot to death. It might be well to note at this point that I have a pair of early 1991A1 Colts that have logged nearly 340,000 rounds collectively....and the holes are still round.
To respond to a PM that I just got on the subject...the spring does buffer the slide to frame impact to a degree, but it does so at the expense of the above-mentioned areas and parts. Simply put, you're not preventing the gun from breaking...eventually...you're just changing where it will break. The impact abutment in the frame was designed to absorb it, and modern steel frames will take it for a long, long time.
John Browning and a team of Colt's top engineers burned a lotta midnight oil figurin' the spring rates for that pistol...to achieve a balance. I gotta accept that they probably had a pretty good handle on what they were doin'.
Not bustin' your chops. Just a FYI/Food for Thought.