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Posted: 8/16/2016 5:12:41 PM EDT
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Who else is using this? How has it been for you? I went through a couple 50rd boxes today and every single one had a sonic crack. RAR 22LR and SiCo Sparrow. Switched over to a mag of CCI Standard and it was back to air rifle quiet. Very disappointed with it. No chrono present, but the other guy noticed the same thing from a couple bays down. Much louder than the bulk Blazer in pistols and 4.5" 15-22.
Did shoot a box of the Gemtech 187gr 300BLK as well, and it was as quiet as the three different 220gr we had with us. |
| I haven't had that issue with Gemtech, but I've only shot about 50 rounds of it. I've got three more bricks though. I'm also wondering if you got a bad batch. I'm still shooting up a couple bricks of RWS subsonics I've had for a while. They've all been consistently subsonic out of my Mist-TD. |
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16" barrel? If you're close enough to Charlotte, you can have a box to test. Quoted:
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Gemtech subs are all I shoot. I haven't had any go supersonic in my PWS. 16" barrel? If you're close enough to Charlotte, you can have a box to test. Yes 16". I'm two hours south of you. Thanks for the offer though. |
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I shoot a lot of the Gemtech 22LR and I love it. Very accurate and reliable.
It stays subsonic in all of my rifles except one.... I have one Ruger 10/22 (the #1230 Tactical with 16.12" CHF barrel) and the Gemtech rounds will have a supersonic crack about 90% of the time. I don't quite understand it, since I have other 16-18" barreled rifles that don't have the issue at all. But this one rifle will cause most of the rounds to be supersonic. It shoots great but the rounds have a crack to them in this gun only. I have no explanation as to why. |
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I shoot a lot of the Gemtech 22LR and I love it. Very accurate and reliable. It stays subsonic in all of my rifles except one.... I have one Ruger 10/22 (the #1230 Tactical with 16.12" CHF barrel) and the Gemtech rounds will have a supersonic crack about 90% of the time. I don't quite understand it, since I have other 16-18" barreled rifles that don't have the issue at all. But this one rifle will cause most of the rounds to be supersonic. It shoots great but the rounds have a crack to them in this gun only. I have no explanation as to why. Perhaps differences in bore or chamber diameter? I remember reading somewhere that people were experiencing velocity increases with tighter bores and/or chambers. |
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Perhaps differences in bore or chamber diameter? I remember reading somewhere that people were experiencing velocity increases with tighter bores and/or chambers. Quoted:
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I shoot a lot of the Gemtech 22LR and I love it. Very accurate and reliable. It stays subsonic in all of my rifles except one.... I have one Ruger 10/22 (the #1230 Tactical with 16.12" CHF barrel) and the Gemtech rounds will have a supersonic crack about 90% of the time. I don't quite understand it, since I have other 16-18" barreled rifles that don't have the issue at all. But this one rifle will cause most of the rounds to be supersonic. It shoots great but the rounds have a crack to them in this gun only. I have no explanation as to why. Perhaps differences in bore or chamber diameter? I remember reading somewhere that people were experiencing velocity increases with tighter bores and/or chambers. That's kind of what I assumed. It has to be something with the gun/barrel, so I would think the chamber or the bore is just pushing it over the edge of super sonic. |
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I shot two boxes out of a recent brick. Nothing went super, but to be honest they have nothing over on CCI Standard which is my go-to. To be honest, I think that Gemtech ammo is manufactured by CCI for Gemtech unless someone knows different. Kinda like Nosler brass by Norma.
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That's kind of what I assumed. It has to be something with the gun/barrel, so I would think the chamber or the bore is just pushing it over the edge of super sonic. Quoted:
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I shoot a lot of the Gemtech 22LR and I love it. Very accurate and reliable. It stays subsonic in all of my rifles except one.... I have one Ruger 10/22 (the #1230 Tactical with 16.12" CHF barrel) and the Gemtech rounds will have a supersonic crack about 90% of the time. I don't quite understand it, since I have other 16-18" barreled rifles that don't have the issue at all. But this one rifle will cause most of the rounds to be supersonic. It shoots great but the rounds have a crack to them in this gun only. I have no explanation as to why. Perhaps differences in bore or chamber diameter? I remember reading somewhere that people were experiencing velocity increases with tighter bores and/or chambers. That's kind of what I assumed. It has to be something with the gun/barrel, so I would think the chamber or the bore is just pushing it over the edge of super sonic. I believe its the bore. As I understand it, CHF barrels tend to produce higher velocities then a button rifled barrels of the same length because the CHF process creates cleaner, more consistent bore and rifling. |
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Sent Gemtech an email...figured that's a decent place to start. Especially since I bought it directly from their site. They replied late yesterday that they'd not had that issue in their testing, but would like to know if I could send them a box of mine for them to test. |
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Well, just got back from the range testing Gemtech Subsonic 22LR
Dedicated AR, CMMG bolt/barrel Warlock Surpressor Once I adjusted the scope for shooting high, I ate a hole in the middle, and I was shooting pretty quick, and my trigger needs to be upgraded. Gemtech subs look good to me 
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No way I can be first to ask for the lot #? Asking me? Or asking Gemtech. I didn't see any marking on the box. I have a replacement brick on the way, but still waiting on the call tag to return this one. Haven't shot one out of the 2nd brick I already had to see what happens. |
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Big Waylon,
If you take an individual box of 50, look on the bottom side, white side with little writitng, there will be a lot number imprinted. You may have to angle the box in the light to see it. I had to take a piece of paper and a pencil to scribble and find the lot number. Very light impression. Example lot number I have is H16X27. |
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Mine was already sent back and I got a replacement brick. Never heard anything back from them.
I did save a couple rounds of the brick I sent back and shot it again with the replacement brick and some CCI SV. I didn't notice near as big of a difference the second trip. |
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