He has a point though. Adjustable sights seem to get wonky from time to time. A slight bend maybe. I can't even measure it, but when we can't get a Glock or 1911 to sight in properly or consistently, the 1st thing I do is chuck the slide in a vice and hammer that rear sight out. Put a fixed sight in, perfectly centered, and viola, it's dead on. The adjustable was perfectly centered as well, but hitting waay left.
Sometimes the way they adjust, can leave the sight canted. Shouldn't effect anything, with some adjustment, but it does. Haven't been able to put my finger on why, when my calipers say it's correct.
Fixed Warren rear (plain black) and a Dawson front (fiberoptic, green, .235-.245 tall, .105-.115 wide), is definitely the hot setup for the Glock 35.
.245 will hit where you're used to, I prefer seeing the impact better, so I prefer a .240 or .235.
There's no doubt in my mind that adjustable rear sights are inferior for combat or competition. Sure, maybe I have a few extra front sights in my tool box from dialing my Zero in perfectly on half a dozen Glocks, but once it's set, it's permanent and reliable.
I'm debating a CZ TSO, but might wait another year until I get to shoot them more. Not sure if I can replace the adjustable on that with fixed, and what options I would have.
I haven't noticed much change in ammo brands, S&B, Federal, and Blazer. Even .40 minor seemed to be close to my Zero.