Sniffer are your jams ammo specific? Over two days does your gun go from being super reliable using the same ammo then it becomes a jammamatic the next day?
My FX9 will shoot all the variation of cartridges I have used to date while my Raven9 only wants round nose bullets. I pretty much limit my match shooting to 124 gr BDX bullets while my practice ammo turns to TCand LSWC bullets all of which will not run in my Raven9 but will in my FX9.
The above situation did not exist with my Ruger PCC that I sold and of course my CX4 Storm 16" and my CZ Scorpion I lost in a boating accident a few years ago. All three of those PCC's made by much larger companies shot every style of ammo I could put my hands on.
I would line up for a S&W Response but suspect I will have to wait until next October.
Take Care
Bob
Sorry to hear about your boating accident - tragic news and oh so common among the gun community over the last few years.
I have asked the same question - how does my gun go from being super reliable on day one to a jammomatic on day two?.
I started off using 147gr RNFP (so not true round nose) and it ran 90% of the time. I have lots of 147 RNFP and found a good load that I liked (only downside was that it was so quiet that sometimes the timer wouldn't pick it up). I figured the issue was the flat nose so switched to 135gr RN (true round nose) and found that the gun ran 90% of the time and seemed to exhibit the same issues.
As mentioned it seems to run fine on day one, I clean my guns pretty thoroughly but dont think this is a factor as I have ran 600 rounds through it in a day (pretty dirty after 600 rounds of Titegroup) and I have cleaned to various degrees between day one and day two (from quick wipe & oil of the bolt and feed ramps etc to full on clean) and noticed no improvement.
Now that I am using round nose bullets I can rule that out. I also switched from Magpie mags to genuine Glock and had the same issues with both so probably not the issue.
That has got me thinking the issue is ammo length related. I was loading to 1.110" which it seems is middle of the road for length. I know some folks are loading longer (1.120") and some shorter (1.085"). I have spoken to each and they tell me their rigs work fine with their respective ammo. I am going to try 1.085" first.
Thinking out loud my jams are where the round has went straight up (ie vertical instead of horizontal / at 90 degrees to the chamber) and the bolt then smashes into it jamming things up good. I am wondering of this is down to a slight length variance in that round as I load on a progressive (gonna say it is slightly longer than the others?) so there is a little flex / slop.
Could it be that this slightly longer round is picked up from the mag and because of the additional length interacts differently with the feed ramp resulting in it getting sent straight up and jamming as described?
This is where I am at and as mentioned I will continue testing (have made up a bunch of 1.085", hopefully I find something that works. I like the FX9 and have gotten it to a point that when it runs it shoots flat but the unpredictable jams sure get old.
I will be moving to an SP9 next year but plan to keep the FX9 for practice / spare gun etc.