I have owned a Ruger PCC (the basic model).
My Ruger developed the ejection issue that can be fixed by swapping out the ejector from the extra mag-well see
https://youtu.be/_RhzODLtcm0 for details.
Mine was otherwise reliable, but you don't have to google too hard, to find people with cycling issues.
I think the ergonomics are OK and can be learned pretty quickly.
I only shot 124gr FMJ through this so I can’t speak to how picky it is with hollow points or other bullet weights.
I personally found the firearm a bit heavy and thus sold it.
Regarding Magazine Pickiness
Both Rugers and FX-9s need magazines with strong springs to have their bolt hold open feature work reliably.
FYI this also applies to Kriss Vectors and any other carbine with a bolt hold open that uses Glock mags.
PMAG 10/17 have worked great for me.
I own a more recent FX-9 and have owned an earlier model which had some quality and ejection issues which I mentioned back in 2019
see
https://www.canadiangunnutz.com/for...-Is-your-FX9-Reliable?p=15558945#post15558945
As the upper and lower can separated it has the same benefits as the Ruger for storage and/or travel.
Regarding Ammunition Pickiness for the FX-9
My current FX-9 is pretty reliable with most types of ammunition out of the box.
I have played around with different buffer weights.
The H3 buffer lowers felt recoil.
I had one failure to eject out of 50 rounds of 115gr FMJ with this buffer weight.
The H3 may be a little too heavy for 115gr ammo or it may have just been an underpowered cartridge.
I'll never know for sure as I swapped in the H2 buffer at this point.
Honestly, if you're only going to shoot is 115gr or 124gr FMJ ammunition the H2 is the buffer I'd recommend.
The only issues I had with the H2 buffer were getting into battery with 147gr Speers Gold-Dot G2 hollow points when using the bolt release. (This may affect similar weight FMJ ammunition.)
Sling-shotting the bolt worked without issue.
147gr Speers Gold-Dot G2 hollow points also cycled without issue.
The H2 buffer is heavier which helps slow down the bolt after a discharge, but it also slows down the bolt when the bolt release is hit.
This I think it did just enough to impact 147gr Speers Gold-Dot G2 hollow points.
So, I popped in the H buffer. Pretty much everything ran reliably with this.
As well as with the standard buffer.
The H buffer isn’t reducing felt recoil by much.
The following all worked well with the H buffer 115gr FMJ, 124gr FMJ, 147gr Gold-Dot G2, 135gr Hornady Critical Duty.
115gr Hornady Critical Defense is the exception.
I think the FX-9 simply doesn't like its geometry.
It didn't run well with the standard buffer or the H buffer.
It would fail to feed sporadically during bolt releases and when cycling.
I didn't have enough of it to test with the heavier buffers but doubt that they'd work better.
Side Note Buffer weights
Standard Carbine Buffer — 3 oz.
H Buffer — 3.8 oz.
H2 Buffer — 4.6–4.7 oz.
H3 Buffer — 5.0–5.4 oz.
