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Thread: Suppressor-over barrel or barrel forward

  1. #1
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    Suppressor-over barrel or barrel forward

    So going to put a suppressor on the 270 and as the title says not sure whether or not to go over barrel or barrel forward and was hoping for advice from all you wise people.

    Most of my hunting is done on the tops but to get there obviously have to go through the bush. For that reason I was thinking over barrel to keep the length down.

    Is there a reason why I should be thinking barrel forward instead? Is there any performance difference between the 2?

    Am fairly sure will buy a dpt as have heard good things unless anyone knows any reasons why I should be looking elsewhere.

    Cheers

  2. #2
    Member Micky Duck's Avatar
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    I have a over barrel DPT on my .270 and really rate it.....despite concerns of extra length I do 99.999% of the time leave it on even when stalking up through the tight bush.also got an older gunworkks spartan that also fits same rifle....over all length makes it 1" longer BUT strangly enough it FEELS to be less muzzle heavy...the only thing we can put it down to is the fact it comes further back towards stock...both work fine and weight difference is stuff all.I do like idea the DPT comes apart incase I nose dive in mud etc or wear out a baffle.

  3. #3
    Member Beetroot's Avatar
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    Over barrel adds less length, muzzle forward is cheaper.

  4. #4
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    Over-barrel suppressors usually enhance accuracy because of the stiffening effect on the barrel created by the rear support bush, as well as being shorter and usually more efficient than muzzle cans by virtue of their larger volume.

  5. #5
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    Usual toss up, price, weight, effectiveness.
    Search the "Rod & Rifle Supressor test"
    https://www.rodandrifle.co.nz/supressor-test.html#/

    the graphs down the bottom show show effectiveness vs cost and weight and size.
    If coming up through the bush you could leave the can off until you get to your target hunting spots.
    Or look to find one with the least amount of forward projection. (Typically about 3"-6")

    Zq
    Puffin and Sideshow like this.

  6. #6
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    I have both that I can fit on my 308,only use the forward can if I’m hunting in the rain and need to use my open sights,looks and feels funny compared to the over barrel,the overbarrel seems a bit quieter as well and balances the gun better.

  7. #7
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    Quote Originally Posted by ZQLewis View Post
    Usual toss up, price, weight, effectiveness.
    Search the "Rod & Rifle Supressor test"
    https://www.rodandrifle.co.nz/supressor-test.html#/

    the graphs down the bottom show show effectiveness vs cost and weight and size.
    If coming up through the bush you could leave the can off until you get to your target hunting spots.
    Or look to find one with the least amount of forward projection. (Typically about 3"-6")

    Zq
    I've got a hardy gen 4 overbarrel which is fine but If I was going to buy a new one I would be seriously looking at the ASE SL5, it's muzzle forward but still less overhang than most of the overbarrel supressors it beats in decibel reduction

    Sent from my SM-G935F using Tapatalk

  8. #8
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    Had the same question myself a couple of years ago.

    The muzzle forward is really only suitable for range shooting because if you fall on it there is a lot of leverage which will either bend the last 2cm of the barrel where its threaded or else stretch and loosen the suppressor's aluminium threads more likely. If you're hunting you will eventually fall on it: maybe first day, maybe after 10 days maybe after 100 but you will eventually damage it.

    For sound reduction, the length forward of the muzzle contributes a lot more than the length behind so for the same suppressor length the muzzle forward is more effective. Also the overbarrel has a second tube inside to hold the gases and its total internal volume is quite a bit less for the same overall size. The rear bushing of an overbarrel is generally hard plastic like delrin and reamed out by the gunsmith to give a few thou clearance all around so it doesn't contact the barrel unless you put force on the tip of the unit. I've seen gunworks ones that were tight but my DPT and ATEC ones have clearance.

    My opinion is that modular is good for the recreational hunter because most suppressors are made way too long and all I'm trying to do is take the edge off the blast, not go for a real quiet level. For professional use like pest control health and safety tips the balance towards a heavier unit with more suppression but it doesn't have to be nice to use. For range shooting you're mostly using it for others' benefit so again a full size and muzzle forward can is preferred. I've taken modules out of both my centrefire suppressors to reduce weight and length. Also just my opinion but I reckon a couple of extra inches on the barrel reduces noise going back to the shooter. 20" and 18" barrels are real loud even with a small cartridge. The 270 is not small; I've lot noticeable hearing from just one nearby 270 blast after having lost very little firing hundreds out of my own 25" .303.

    I don't know why you should listen to me not others but have a google around and look for an 80% consensus across the internet.
    Sideshow likes this.

  9. #9
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    The delrin bush is supposed to make contact with the barrel,not have a few thou clearance......it either has to make contact when the suppressor is fitted,or else there has to be a substantial gap between barrel and bush.....if not then the back of the can will rattle or ping against the barrel when being used.

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    Re the rear delrin bush, I've had rifles come back from from fitting by reputable silencer manufactures with a slight clearance and I've also had experienced gun smiths recommend that they be touching but not tight.
    I could make an argument for both

    Currently I have both on my rifles. Have not experienced any movement or rattling on the one with a small clearance. Once they are done up on the barrel they are firmly locked in place. I view the rear bush as being to prevent excess flex in the silencer and that as the barrel may not be perfectly centered relative to the thread on the end and wall thickness etc so a small gap stops the barrel being subject to any side loading by the silencer down up in different positions.
    Last edited by ZQLewis; 20-12-2018 at 10:04 PM.
    Friwi likes this.

  11. #11
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    I have fitted thousands of them to rifle barrels,if the bush nearly but not quite makes contact with the barrel they can end up rattling against the barrel upon firing....which the punters of course do not like.A big gap between bush and barrel is alright....contact between bush and barrel is alright.....but the bush not quite touching the barrel is not very desireable,for this reason.
    gundoc, timattalon and Sideshow like this.

  12. #12
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    Hi,

    Here is an earlier thread on this topic:

    https://www.nzhuntingandshooting.co....tml#post715364

    What are you looking for from the suppressor? light weight and compact size or are you more looking at maximum suppression first?

    If you are looking for a smaller suppressor with excellent suppression for its size, I would recommend the SL5i from our products:

    https://www.aseutra.fi/s-series-sl5i-suppressor.html

    In general with regards to over barrel suppressors, front mounting suppressors, their durability or suppression ability,

    Not all brands are equal and there are great solutions on the market for both types of suppressors.

    But then there are also small compact front mounting suppressors that are not very effective or not that durable.

    There are also over barrel suppressors that are not as efficient as they could be or are otherwise overtly larger than needed.

    The history, know how and resources of the manufacturer go a long way here, for optimizing both of these suppressor types

    Our company has continuously manufactured sound suppressors now for 25 years, so we know a bit by now

    Best Regards!

    Tuukka Jokinen
    Ase Utra sound suppressors
    300_BLK likes this.

  13. #13
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    I’m sure over barrel shouldn’t touch at bushing point. If it does it can effectively “bend” the barrel between the muzzle and the rear bush causing accuracy issues. A gunsmith with a lot of experience explained this to me.

  14. #14
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    Quote Originally Posted by Ginga View Post
    I’m sure over barrel shouldn’t touch at bushing point. If it does it can effectively “bend” the barrel between the muzzle and the rear bush causing accuracy issues. A gunsmith with a lot of experience explained this to me.
    Correct, the back over the barrel suppressors should not touch the barrel in their rear part. Even though some manufacturers have said that they have a two point mounting system.

    One of the few true two point mounting systems is for example seen in the U.S. Ops Inc suppressors, from a way back time already.

    Best Regards!

    Tuukka

  15. #15
    DPT
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    Quote Originally Posted by Ginga View Post
    I’m sure over barrel shouldn’t touch at bushing point. If it does it can effectively “bend” the barrel between the muzzle and the rear bush causing accuracy issues. A gunsmith with a lot of experience explained this to me.
    That is correct, often the barrel is not concentric. We always run a slight clearance on our suppressors.
    10-Ring likes this.

 

 

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