Alllen Bundy
Member
I have been shooting plastic pistols for 25+ years now and never, once, have I noticed any balance change as the magazine gets empty.
I noticed the top heavy side to side floppiness as soon as I bought my P365.
I also noticed that my P365XL was also nose heavy when low on ammunition. Adding 2 oz of weight inside the handgrip made it rest backward slightly.
Theoretically the extra weight should reduce muzzle flip slightly. I think that the weighting it does help a little bit, but I wouldn't bet on it without measuring it, because of the possible placebo effect.
I would liken the weighting to removing an annoying tag on the inside of your shirt. It's not a necessity, but it just makes it a little nicer.
Thriller