Situation: My stamp for the Thompson Machine (TM) Isis-2 in 45acp that my wife won from TM at the 2016 NRA convention just came back. This is my first pistol suppressor. While waiting for the stamp, I purchased a CZ P-07 "suppressor ready" and loaded it up with Cajun Gunworks parts. The P-07 is the only pistol I own with a threaded barrel. I also bought a TM 1/2x28 recoil booster/Neilson Device. I had shot ~300 rounds w/o the suppressor, mostly 124gr PPU with some 115 Magtech and Federal 124gr subsonic "Suppressor" as well. All performed as expected out of the P-07 and a M&P 9 FS.
Problem: The Federal subsonic 124gr Fails To Eject 100% of the time; it extracts from the chamber but the slide doesn't go back far enough for the spent case to even hit the ejector. The spent case is still held by the extractor with the front of the case pressed against the barrel hood... if it went back a little farther I'd probably have a stovepipe. When trying the 124gr PPU I get a stovepipe about 60% of the time. The 115gr Magtech has been 100% so far (50-ish rounds), but it's supersonic and the ejection is so weak that I'm sure I'll eventually get a stovepipe with it as well.
Since this is my first pistol suppressor with a neilson device, I could use some input before I do anything. My first "anything" will be to try some 147gr ammo. My second "anything" will be to fire the gun more as my thought process is that the extra(?) weight of the 45acp can and it's larger diameter bore aren't playing nice with the relatively new/stiff recoil spring in the P-07... but this is a semi-uneducated guess. I'm guessing backpressure plays less (almost zero?) part in a pistol with a tilting barrel/Browning action? My 3rd course of action would be to find a lighter recoil spring if the collective INGO wisdom is that the OEM is too much for this configuration. Maybe a lighter spring in the booster/LID/Neilson? 4th would be to get a threaded barrel for a 1911 if the P-07/Isis-2 in 45 proves to be an unworkable combination...
I reached out to TM with a less detailed description of my issue via a Facebook PM, but I suspect the hurricane may be delaying a response.
Problem: The Federal subsonic 124gr Fails To Eject 100% of the time; it extracts from the chamber but the slide doesn't go back far enough for the spent case to even hit the ejector. The spent case is still held by the extractor with the front of the case pressed against the barrel hood... if it went back a little farther I'd probably have a stovepipe. When trying the 124gr PPU I get a stovepipe about 60% of the time. The 115gr Magtech has been 100% so far (50-ish rounds), but it's supersonic and the ejection is so weak that I'm sure I'll eventually get a stovepipe with it as well.
Since this is my first pistol suppressor with a neilson device, I could use some input before I do anything. My first "anything" will be to try some 147gr ammo. My second "anything" will be to fire the gun more as my thought process is that the extra(?) weight of the 45acp can and it's larger diameter bore aren't playing nice with the relatively new/stiff recoil spring in the P-07... but this is a semi-uneducated guess. I'm guessing backpressure plays less (almost zero?) part in a pistol with a tilting barrel/Browning action? My 3rd course of action would be to find a lighter recoil spring if the collective INGO wisdom is that the OEM is too much for this configuration. Maybe a lighter spring in the booster/LID/Neilson? 4th would be to get a threaded barrel for a 1911 if the P-07/Isis-2 in 45 proves to be an unworkable combination...
I reached out to TM with a less detailed description of my issue via a Facebook PM, but I suspect the hurricane may be delaying a response.