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Suppressors POI shifts with TBAC?

deersniper

Protecting the Sheep
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  • Feb 22, 2007
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    Since there's so many ballers here with ultra 5s, 7s, 9s and 338s. How much zero difference is there when you switch from say a 5 to 338. Or a 9 to 338. Is the zero pretty close?

    Thanks.
     
    Should be pretty close. The more the weight changes the more of a shift you may see.

    Is the POI predictable when the suppressor is taken off and reinstalled? Or do you have to check zero when the suppressor is mounted each time? I have an AAC SD and I need to rezero each time I put the suppressor on. I’m looking to upgrade to a suppressor that is predictable.
     
    Is the POI predictable when the suppressor is taken off and reinstalled? Or do you have to check zero when the suppressor is mounted each time? I have an AAC SD and I need to rezero each time I put the suppressor on. I’m looking to upgrade to a suppressor that is predictable.

    Wow. I've never had a problem like that with either of my suppressors. I'm ordering a TBAC, but I've owned a SiCo Omega and a SilencerTech for years, and both of them are repeatable. I can't think of the last time I shot any of my rifles without a suppressor, and I've NEVER had to rezero. I zeroed my rifles with the suppressors on once and in all these years I've never had to change unless I was switching calibers.
     
    Is the POI predictable when the suppressor is taken off and reinstalled? Or do you have to check zero when the suppressor is mounted each time? I have an AAC SD and I need to rezero each time I put the suppressor on. I’m looking to upgrade to a suppressor that is predictable.

    Are you saying it doesn't shoot at the same spot when you have the can on each time? Most cans are going to change your zero but it should move to the same spot
     
    I'm using a 338 Ultra on a TRG in 260 Rem & a Tikka TAC A1 in 223 with a 20" barrel. POI is very predicable on both when taken off and reinstalled. There is about a 2" change between off and on with the TRG at 100 yards and 1" on the Tikka. The approval came thru a few months ago so I've had some good range time to monitor its consistency. On a side note the level of suppression on the 223 is amazing with that 338 ultra.
     
    Personally I think the barrel length, weight, and contour have a bit to do with the zero shift when installed vs uninstalled. Back when I had a 20” M24 contour 308 I could spin my 30P1 on and off and not change zero at all. On the RPR, 24” factory contour. I had 3-4” of shift @ 100, but was very repeatable every time. I don’t have any of that anymore but I have an ultra 7 a month or two away from approval and I’m expecting the same results on my AI barrels.

    On thing I’ve also thought about was guys doing testing on shouldered vs barrel nut barrels on POI shifts when a barrel nut barrel has been impacted. The ultras are a very light can but there’s a chance maybe the weight of the 30P1 was the difference. Shouldered barrels could have a stronger base. I’m rambling now and probably have been overthinking it but I don’t think in theory is too far fetched. I don’t have the funds nor the time test my theories but it would be an interesting test.
     
    Is that the one with the junk ratchet mount?

    If so I think people have had better luck with the newer extra teeth mounts and or filing the mount so it fits correctly
    Yes, it’s a 51t adapter. The suppressor is quite enough, I just don’t care for the mounting system. This was my first suppressor, I’ve learned a lot since I purchased it. If I had a do over, I’d go with an Ultra 9. I’m sure I would be happy with one.
     
    I think you can fix the inconsistent lock up
    image.jpg
     
    I’ve posted this before. These are 2-5 shot groups with 4 different suppressor. Not all tbac. The bottom right is with a bare muzzle. I shot 5 let cool and switch suppressors and shot 5. And so on and so on. The 6.5 ultra 7 actually raised my poi. Each group was aimed at the center of each diamond.

    Sako 75 varmint 223
    Fiocchi 55gr vmax ammo
    Rifle was threaded leaving the factory crown
    7118671
     
    Once you zero with an Ultra on you should be able to take can on and off as much as you like and not change zero at all.
    Here is a video with the SR mount


    Here is the Ultra series
     
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    Once you zero with an Ultra on you should be able to take can on and off as much as you like and not change zero at all.
    Here is a video with the SR mount


    Here is the Ultra series

    Yes but I am going to have a 338 and ultra 9. In your experience has the POI been close when swapping the 2? Thanks
     
    Yes but I am going to have a 338 and ultra 9. In your experience has the POI been close when swapping the 2? Thanks
    I finally get your question lol weight of can could be the reason for more shift if it has any. But out of curiosity I must ask why 338 and 9? Doesn’t seem like enough of a difference to justify switching between the two on one host. If I could buy all over again and wanted 2 different “mission specific” precision cans. I’d do either a 338 or 9 and an ultra 5.
     
    Yes I should have done a 5 and 338. But I bought a 9. Then I read all the rave reviews about how good the 338 was. Then I found a cheap certificate for a free TBAC can.

    I do have a Gemtech sandstorm which kind of fills the short and light category. It's a good can too.
     
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    They are pretty close. Not all barrels react the same to weight. I'll try to shoot them all at 100 this week and document Ultra 5 through 338 shift on a 308 or 6.5
    That’s what I did. I did it not only to see shift change, but to see accuracy change. Since that gun shoots pretty much only factory ammo I knew that the different weight of difference suppressors would affect harmonics and accuracy.