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Posted: 8/22/2023 3:42:44 PM EDT
Everywhere I have read has said that suppressing direct blowback pistols doesn’t make for a pleasant shooting experience. After today I can see why.
I got my Allegheny arms barrels in today for my Beretta 81, 84. And just like everyone said the port pop and I burned powder to the face was terrible. It was also launching my 32acp brass a good 30ft. However I wanted to see if putting the 32acp barrel in the 84 with a heavier recoil spring would tame the port pop and gas. Sure enough it seemed to cut in in half and now my brass was only going about 15-20ft. Since these are direct blowback guns I wasn’t using a piston but I thought I would try it and see if it helped. I would say it cut the noise and gas down by about half again using the piston. Not sure if this can damage a fixed barrel gun or not but since I was able to make this gun shoot so much better I thought I would share what I found. Especially since the market just got flooded with these barrels after years of waiting. Next I’m going to try different powders to try and get a little better performance. Attached File Attached File |
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Dude, I’ve been on the waiting list for those barrels for like 6 years, and last time I called them they said it likely wasn’t happening. That was this year. WTF.
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Quoted: Everywhere I have read has said that suppressing direct blowback pistols doesn’t make for a pleasant shooting experience. After today I can see why. View Quote Yeah, at least with anything .380 & larger, and with some .32s. I find our Beretta 81 pretty pleasant with our Cheetah model, but the .380 cal 84FS, PPK/S or CZ83 are obnoxious with any can. Quoted:Since these are direct blowback guns I wasn’t using a piston but I thought I would try it and see if it helped. I would say it cut the noise and gas down by about half again using the piston. Not sure if this can damage a fixed barrel gun or not but since I was able to make this gun shoot so much better I thought I would share what I found. View Quote It could, though the risk is pretty low with the small charge, low pressure and significant overbore of .32 ACP in a 9mm can. |
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Quoted: Yeah, at least with anything .380 & larger, and with some .32s. I find our Beretta 81 pretty pleasant with our Cheetah model, but the .380 cal 84FS, PPK/S or CZ83 are obnoxious with any can. It could, though the risk is pretty low with the small charge, low pressure and significant overbore of .32 ACP in a 9mm can. View Quote View All Quotes View All Quotes Quoted: Quoted: Everywhere I have read has said that suppressing direct blowback pistols doesn’t make for a pleasant shooting experience. After today I can see why. Yeah, at least with anything .380 & larger, and with some .32s. I find our Beretta 81 pretty pleasant with our Cheetah model, but the .380 cal 84FS, PPK/S or CZ83 are obnoxious with any can. Quoted:Since these are direct blowback guns I wasn’t using a piston but I thought I would try it and see if it helped. I would say it cut the noise and gas down by about half again using the piston. Not sure if this can damage a fixed barrel gun or not but since I was able to make this gun shoot so much better I thought I would share what I found. It could, though the risk is pretty low with the small charge, low pressure and significant overbore of .32 ACP in a 9mm can. The beretta 84, 85 I shot today were miserable and I’m not sure I’ll shoot them suppresses much more unless I can correct some of the issues with different loads. Do you know what the damage running a piston on a fixed barrel could cause? Just so I know what to look out for. |
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Quoted: Everywhere I have read has said that suppressing direct blowback pistols doesn’t make for a pleasant shooting experience. After today I can see why. I got my Allegheny arms barrels in today for my Beretta 81, 84. And just like everyone said the port pop and I burned powder to the face was terrible. It was also launching my 32acp brass a good 30ft. However I wanted to see if putting the 32acp barrel in the 84 with a heavier recoil spring would tame the port pop and gas. Sure enough it seemed to cut in in half and now my brass was only going about 15-20ft. Since these are direct blowback guns I wasn’t using a piston but I thought I would try it and see if it helped. I would say it cut the noise and gas down by about half again using the piston. Not sure if this can damage a fixed barrel gun or not but since I was able to make this gun shoot so much better I thought I would share what I found. Especially since the market just got flooded with these barrels after years of waiting. Next I’m going to try different powders to try and get a little better performance. https://www.ar15.com/media/mediaFiles/108802/IMG_4104_jpeg-2928584.JPG https://www.ar15.com/media/mediaFiles/108802/IMG_4105_jpeg-2928585.JPG View Quote Dayum. Is that a 36M? I thought mine looked rough, lol. |
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Quick update I reloaded just a few rounds to see if they were at least a little quieter and less gas. I used a super heavy bullet and very light charge (Hornady 100gr, 1.5gr of bullseye).
Definitely seemed quieter but more importantly I didn’t get pelted in the face with unburnt powder. But it was pitch black so I couldn’t see how far the brass was getting thrown. This was on a beretta 81 recoil spring without a booster. I with try the beretta 84 spring and booster to see if that helps later Eta I bought an OCL lithium and I’m wondering if that will do better or worse? At least it won’t feel like a lead brick hanging off of a small pistol. |
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Quoted: They sent an email last week View Quote Quoted: They came out last week they still might have some. If you didn’t get the email I would give them a call. View Quote I called them up and the lady said that she didn’t have a number for Josh and that I should email him. Did that; we’ll see if he replies before they’re gone. |
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Quoted: Maybe a chamber ring delayed blowback mod would be in order. I believe Dr. Dater did this to some hosts. Not sure if can run unsuppressed after putting a micro "o-ring groove" somewhere mid-chamber. https://www.ar15.com/forums/industry/chamber-ring-delayed-blow-back-9mm/682-279474/ View Quote |
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If you've got a .45 suppressor, that might be another option.
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Quoted: I don't think I'd use a normal booster on a fixed-barrel gun (are those Berettas actually fixed barreled? I know the 92 is NOT, and should use a booster unless the can is ultra-light). All the pistol can manuals I have all say using a LID/booster on a fixed barrel gun may damage either the piston or the can and you should always use a fixed barrel spacer on them so the can doesn't yank out then back in unnecessarily. But, not an expert on the subject. View Quote It is a non-reciprocating barrel, and should not use a booster. Quoted: I just got the threaded .32 barrel for the 81. Planning to go shoot it today. If blowback is an issue, is there a source for a heavier recoil spring? Does the .380 actually have a heavier spring, or are they the same? View Quote |
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Quoted: Yeah, no blowback with this .45 can. https://i.imgur.com/RHIMj8L.jpeg I just got the threaded .32 barrel for the 81. Planning to go shoot it today (maybe with a slightly smaller can). If blowback is an issue, is there a source for a heavier recoil spring? Does the .380 actually have a heavier spring, or are they the same? View Quote I do have a bowers 50 lol |
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Quoted: It is a non-reciprocating barrel, and should not use a booster. I’ve been told, by Josh, that they are the same. View Quote You can swap a lot of the parts between the 81 and 84 but the recoil spring and rod are different diameters and my 84 and 85 recoil springs feel stuffer. Also there was a noticeable difference in blowback between the two. So if you have an 84 the 32 barrel will drop right in. But you can’t drop a 84 recoil assembly into an 81. |
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Quoted: You can swap a lot of the parts between the 81 and 84 but the recoil spring and rod are different diameters and my 84 and 85 recoil springs feel stuffer. Also there was a noticeable difference in blowback between the two. So if you have an 84 the 32 barrel will drop right in. But you can’t drop a 84 recoil assembly into an 81. View Quote Interesting; thanks. |
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Quoted: Found what I recall the discussion was. Post 6 & 12: https://www.ar15.com/forums/Armory/Anyone-looking-for-a-really-quiet-non-rimfire-suppressed-play-thing--/20-488325/ View Quote View All Quotes View All Quotes Quoted: Found what I recall the discussion was. Post 6 & 12: https://www.ar15.com/forums/Armory/Anyone-looking-for-a-really-quiet-non-rimfire-suppressed-play-thing--/20-488325/ Interesting. It has been a number of years since I last did it (like 15+) and my memory is a little vague. I can tell you that the ring must be smooth. As I recall, I used an O-ring internal grooving bit and rounded off the corners. It is only going .002-.003 deep. |
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I am picking up a ZASTAVA M70 32ACP next week so this is very interesting.
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Since the cat's nearly out of the bag, this is the barrel I'm alluding to in my thread How-hard-is-it-to-measure-thread-concentricity-to-the-bore with an 85 host.
I think I'll try it with a fixed spacer on my Griffin Revo 45 first, then decide if I want to try it with the Odessa... |
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Well it looks like I can solve most of this problem via reloading for the 32acp. I tried 20 rounds of Hornady 100gr xtp since that’s all I had at the moment over a tiny charge of bullseye 1.4gr. It got rid of 99% of the unburnt powder to the face and was considerably quieter. I was also running the 32acp barrel in my 84 with a stronger recoil spring. 100% reliable so far.
I mostly shoot cast bullets I just need to make cast some more of my 80gr and see if I can get the same results with a lighter bullet. I’ll probably keep the powder charge the same. I think I’m going to try the same thing with the 380 barrel and use a small charge of n310 or n320 |
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Well if anyone is still following this thread I loaded some 100gr bullets an over 2.0gr of N310. It solved the blowback of unburnt powder and some of the port pop. I mostly just was concerned about not getting peppered in the face. It’s hearing safe but not nearly as quite as my other pistols that aren’t fixed barrels.
This load cycled with and without the can so I might try and go a little lower on the powder charge. So my issues see to be solved for both guns now |
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Quoted: Well if anyone is still following this thread I loaded some 100gr bullets an over 2.0gr of N310. It solved the blowback of unburnt powder and some of the port pop. I mostly just was concerned about not getting peppered in the face. It’s hearing safe but not nearly as quite as my other pistols that aren’t fixed barrels. This load cycled with and without the can so I might try and go a little lower on the powder charge. So my issues see to be solved for both guns now View Quote |
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Quoted: Dude, I’ve been on the waiting list for those barrels for like 6 years, and last time I called them they said it likely wasn’t happening. That was this year. WTF View Quote Man, I’m sorry. IDK which one of my guys told you that but I had a soft commitment on these since last summer and we locked everything in 100% after SHOT. Bottom line is, they’re here and we still have a few hundred left on this initial batch with another on the way before the end of the year. Quoted: Maybe a chamber ring delayed blowback mod would be in order. I believe Dr. Dater did this to some hosts. Not sure if can run unsuppressed after putting a micro "o-ring groove" somewhere mid-chamber. https://www.ar15.com/forums/industry/chamber-ring-delayed-blow-back-9mm/682-279474/ View Quote It does work but the one I did as an experiment a few years ago pretty much wrecked the brass and generated a lot of brass shavings. Quoted: You can swap a lot of the parts between the 81 and 84 but the recoil spring and rod are different diameters and my 84 and 85 recoil springs feel stuffer. Also there was a noticeable difference in blowback between the two. So if you have an 84 the 32 barrel will drop right in. But you can’t drop a 84 recoil assembly into an 81. View Quote It’s not a difference in the caliber, it’s the difference in the generation of the gun. IIRC the B series increased the dia of the guide rod and spring weight. Within the same generations, the only parts differences are the barrel and mags (on the double stack guns). You have to remember, there are six generations of Beretta 80 series out there now with in line changes throughout. Additionally, the Tisas Fatih while extremely similar to the Beretta, also uses a different recoil assembly. Your 84 is either a F or an FS and your 81 is a pre-B that has the smaller rod and spring. |
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Quoted: Man, I’m sorry. IDK which one of my guys told you that but I had a soft commitment on these since last summer and we locked everything in 100% after SHOT. Bottom line is, they’re here and we still have a few hundred left on this initial batch with another on the way before the end of the year. It does work but the one I did as an experiment a few years ago pretty much wrecked the brass and generated a lot of brass shavings. It’s not a difference in the caliber, it’s the difference in the generation of the gun. IIRC the B series increased the dia of the guide rod and spring weight. Within the same generations, the only parts differences are the barrel and mags (on the double stack guns). You have to remember, there are six generations of Beretta 80 series out there now with in line changes throughout. Additionally, the Tisas Fatih while extremely similar to the Beretta, also uses a different recoil assembly. Your 84 is either a F or an FS and your 81 is a pre-B that has the smaller rod and spring. View Quote Thanks, I ordered 2. |
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It’s not a difference in the caliber, it’s the difference in the generation of the gun. IIRC the B series increased the dia of the guide rod and spring weight. Within the same generations, the only parts differences are the barrel and mags (on the double stack guns). You have to remember, there are six generations of Beretta 80 series out there now with in line changes throughout. Additionally, the Tisas Fatih while extremely similar to the Beretta, also uses a different recoil assembly. Your 84 is either a F or an FS and your 81 is a pre-B that has the smaller rod and spring. View Quote Gotcha my 84 is a F. |
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Quoted: Man, I’m sorry. IDK which one of my guys told you that but I had a soft commitment on these since last summer and we locked everything in 100% after SHOT. Bottom line is, they’re here and we still have a few hundred left on this initial batch with another on the way before the end of the year. It does work but the one I did as an experiment a few years ago pretty much wrecked the brass and generated a lot of brass shavings. It’s not a difference in the caliber, it’s the difference in the generation of the gun. IIRC the B series increased the dia of the guide rod and spring weight. Within the same generations, the only parts differences are the barrel and mags (on the double stack guns). You have to remember, there are six generations of Beretta 80 series out there now with in line changes throughout. Additionally, the Tisas Fatih while extremely similar to the Beretta, also uses a different recoil assembly. Your 84 is either a F or an FS and your 81 is a pre-B that has the smaller rod and spring. View Quote Does the Tisas Fatih run on Beretta mags? |
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They do use the same mags although the floor plates are a different profile.
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Quoted: Shot mine today. Allegheny’s .32 theaded bbl in a 85f. Port pop didn’t seem bad, and it was surprisingly quiet, but I was wearing muffs, so take that with some salt. I did notice ejection port sparking, quite a bit, and I did get some powder to the face. Ammo used was 71gr FMJ PMC Bronze, and I had a full-length Odessa cranked onto it. A proper 007 rig; definitely one of my coolest setups. Ok, so now for the problem: every few rounds, it’d stovepipe a live round. Why might that be? https://www.ar15.com/media/mediaFiles/563710/71573024927__13C758F3-BDD6-4681-887D-0B3-2946131.jpg View Quote Too much backpressure making it open too fast, which causes the slide to slam back & close on the case before it makes it out of the ejection port? My best guess, have you tried videoing your shooting w/ your phone set to maximum frames per second? Also, given you can shorten your can, might take off half your baffles and see if the issue goes away. Of course, will be louder. |
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Quoted: Too much backpressure making it open too fast, which causes the slide to slam back & close on the case before it makes it out of the ejection port? My best guess, have you tried videoing your shooting w/ your phone set to maximum frames per second? Also, given you can shorten your can, might take off half your baffles and see if the issue goes away. Of course, will be louder. View Quote Oh, the empties weren’t stovepiping… I think they might be in orbit because I never saw where they went. It was live rounds stovepiping. Shortening it for the next test seems like a reasonable COA. |
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Quoted: Oh, the empties weren’t stovepiping… I think they might be in orbit because I never saw where they went. It was live rounds stovepiping. Shortening it for the next test seems like a reasonable COA. View Quote View All Quotes View All Quotes Quoted: Quoted: Too much backpressure making it open too fast, which causes the slide to slam back & close on the case before it makes it out of the ejection port? My best guess, have you tried videoing your shooting w/ your phone set to maximum frames per second? Also, given you can shorten your can, might take off half your baffles and see if the issue goes away. Of course, will be louder. Oh, the empties weren’t stovepiping… I think they might be in orbit because I never saw where they went. It was live rounds stovepiping. Shortening it for the next test seems like a reasonable COA. Yep, sorry, I misread. Still, the slide might be moving too fast, meaning the bullet hits the feed ramp & bounces up too fast. Getting a live round to stovepipe is a bit unusual. |
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Quoted: Yep, sorry, I misread. Still, the slide might be moving too fast, meaning the bullet hits the feed ramp & bounces up too fast. Getting a live round to stovepipe is a bit unusual. View Quote Yeah, it did it with all 3 mags, too. Other courses of action I’m considering, maybe in combination: Handloading Getting a new Cheetah slide and putting a heavy optic on it Simply trying other ammo Using a bigger 9mm can, like a MoD 9 3lug Putting a Griffin taper mount on it and using a .458 MG7k Handloading |
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Go up 1-2# on the recoil spring as welll. I’d bet your slide velocity is too high and it’s kicking the rounds up the ramp too quickly. Friggin sweet looking set up!
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Quoted: Thanks, where would you recommend I acquire one? I don’t see Cheetah spring upgrades on your site. View Quote View All Quotes View All Quotes Quoted: Quoted: Go up 1-2# on the recoil spring as welll. I’d bet your slide velocity is too high and it’s kicking the rounds up the ramp too quickly. Friggin sweet looking set up! Thanks, where would you recommend I acquire one? I don’t see Cheetah spring upgrades on your site. Wolff Gunsprings? Also don't forget your mag springs - your slide velocity is higher so your mags need to present the rounds quicker too. That could very well be a big part of the problem, depending on how tired your mag springs are in the first place. Short 1911s have a similar problem. |
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Quoted: Wolff Gunsprings? Also don't forget your mag springs - your slide velocity is higher so your mags need to present the rounds quicker too. That could very well be a big part of the problem, depending on how tired your mag springs are in the first place. Short 1911s have a similar problem. View Quote Thanks. Wolff has XP recoil springs for the 81 and 84…I’ll have to check my guide rod diameter to see if they’ll fit. They don’t have single-stack mag springs, though. |
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Quoted: Thanks. Wolff has XP recoil springs for the 81 and 84…I’ll have to check my guide rod diameter to see if they’ll fit. They don’t have single-stack mag springs, though. View Quote The great thing about magsprings - most of them are universal 32acp? How many rounds does a mag hold? Good chance that Colt 1903/1908 mag springs would work just fine.. |
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I just realized we were talking about an F/FS/X model so the Wolff springs won't work. I'm working on a solution now for XP springs for these newer guns.
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I mostly shoot a wet/wiped can on mine, so it tends to spit anyway. It’s just the right size on the 81.
I found the Wolff springs here. They note that the recoil spring only fits on .215” diameter guid rods. Checking my model BB, I see my guide rod is .236”. Bummer. Makes me think about either turning down the guide rod, or (better idea) finding the smaller diameter rod and swapping them out. |
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I apologize for distracting the thread but I am not a fan of my Beretta 92fs sights and I think yours look much better. What are they? Do you need a different slide or do those somehow go onto the stock fixed sights?
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Quoted: I apologize for distracting the thread but I am not a fan of my Beretta 92fs sights and I think yours look much better. What are they? Do you need a different slide or do those somehow go onto the stock fixed sights? View Quote In my case, Allegheny dovetailed my slide and upgraded the sights. Might not work on a 92. |
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Quoted: I apologize for distracting the thread but I am not a fan of my Beretta 92fs sights and I think yours look much better. What are they? Do you need a different slide or do those somehow go onto the stock fixed sights? View Quote I don’t recall who made them. I bought them 15+ years ago. The front sight goes over the factory front sight blade and is drilled and pinned in place. The rear adjustable just goes into the dovetail. I want to say I bought them through Midway, but I don’t see anything like that there now. Probably been out of production for years. |
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Thank you both for the info on the sights.
Sorry for the side track to everyone else. |
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