I've seen so many contradicting views on heavier recoil assemblies when using hotter loads that my head is all polluted. I have not fired my new Gen3 G29sf yet, but plan on doing so once my 200 rnds of Underwood 180gr TMJ arrive tomorrow. I plan on using stronger loads the majority of the time, particularly for the first 500 or until feel comfortable And confident in its reliability. Once I attain that level of confidence in this piece, it might see 50-100 rounds per month. I would also like to add that every gun I own and have ever owned is 100% stock internally with the exception of the steel guiderod with stock weight spring in my Gen2 G19...my wife thinks the gun handles better that way, but I see no appreciable difference. I would like to leave everything stock...internally at least...if possible. Kevin at Underwood (very nice man btw) recommended switching to a Wolf steel rod and 22# spring when I ordered my ammo. I am looking for any and all input that I can find to help me obtain the confidence I KNOW this pistol can provide me with. I am always willing to listen to and consider/evaluate input from anyone willing to offer it. "There are very fine lines between confidence, arrogance, and outright ignorance!" My Grandfather...possibly borrowed.