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Old 06-01-2008, 02:27 AM   #11
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Quote:
Originally Posted by hwatts47 View Post
When a bullet is fired it breaks the sound barrier, thats the load bang, what a suppressor does is it slow the bullet down to just above or just under the sound barrier, it makes the barrel longer so that the combustion is dipursed more effeciantly therefor reduced recoil. Draw back is the only bullets that can be effectively suppressed or silenced are the smaller rounds like 9mm, .22 and so on; you can put a suppressor on a .40 or .45 but it really wouldn't be effective at suppressing the sound. The other draw back is, while reducing the speed it reduces the distance the bullet can be accurately fired, especially with a .45 because it is only traveling at approx 850 fps anyway (give or take, depending on the load) , so you would have to be pretty close to your target.
What a technical 1st post.............
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Old 06-01-2008, 07:02 AM   #12
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Nice post on silenced pistols. You can silence .22LR, but I would rather use subsonic rounds. Not quite as quite as a silencer on a .22 rifle, but it works good enough for this guy.

And welcome to XDTalk from Virginia.
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Old 06-01-2008, 07:32 AM   #13
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Originally Posted by hwatts47 View Post
When a bullet is fired it breaks the sound barrier, thats the load bang, what a suppressor does is it slow the bullet down to just above or just under the sound barrier, it makes the barrel longer so that the combustion is dipursed more effeciantly therefor reduced recoil. Draw back is the only bullets that can be effectively suppressed or silenced are the smaller rounds like 9mm, .22 and so on; you can put a suppressor on a .40 or .45 but it really wouldn't be effective at suppressing the sound. The other draw back is, while reducing the speed it reduces the distance the bullet can be accurately fired, especially with a .45 because it is only traveling at approx 850 fps anyway (give or take, depending on the load) , so you would have to be pretty close to your target.
Welcome! I have to respectfully disagree with your post and explanation of how a suppressor works. While suppressors do reduce the velocity of the bullet, that may only be a result of the design of the suppressor depending on the method they use in their design.

While the barrel is made longer by the addition of the suppressor, it is solely for the purpose of making an expansion chamber for the expelled gases caused by the combustion of the cartridge.

Bottom line, a suppressor is not designed to "slow" down a bullet to subsonic speeds thereby reducing sound. Suppressors are much less effective with super-sonic rounds as they produce their own sound signature due to the sonic "crack" developed by the round breaking the sound barrier. Rather, suppressors reduce sound by making a controlled expansiion chamber for expelled gases and as a result, also reduce muzzle flash.

Quote:
The other draw back is, while reducing the speed it reduces the distance the bullet can be accurately fired, especially with a .45 because it is only traveling at approx 850 fps anyway (give or take, depending on the load) , so you would have to be pretty close to your target.
Those who use suppressors find that it actually improves accuracy. The added weight of the suppressor along with the reduction is muzzle jump lends to more control afforded to the shooter. Follow-up shots are better kept on target as a result with minimal reduction in bullet speed for sub-sonic rounds. Again, suppressors do not significantly reduce bullet speed and you do not have to make significant concessions in distance to target to maintain accuracy.

Good info here at Wiki: Suppressor - Wikipedia, the free encyclopedia
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Old 06-01-2008, 09:30 AM   #14
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Isn't that was the military uses silencers now days?

1) Silent
2) Accuracy

And again, when could one get a silencer for a SA-XD40 Service?
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Old 06-01-2008, 09:44 AM   #15
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A silencer makes it so the bullet doesn't break the sound barrier. HAHAHAHAHA
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Old 06-01-2008, 11:45 PM   #16
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Quote:
Originally Posted by hwatts47 View Post
When a bullet is fired it breaks the sound barrier, thats the load bang, what a suppressor does is it slow the bullet down to just above or just under the sound barrier, it makes the barrel longer so that the combustion is dipursed more effeciantly therefor reduced recoil. Draw back is the only bullets that can be effectively suppressed or silenced are the smaller rounds like 9mm, .22 and so on; you can put a suppressor on a .40 or .45 but it really wouldn't be effective at suppressing the sound. The other draw back is, while reducing the speed it reduces the distance the bullet can be accurately fired, especially with a .45 because it is only traveling at approx 850 fps anyway (give or take, depending on the load) , so you would have to be pretty close to your target.

You couldn't be more wrong. A suppresor is a series of baffles. Doesn't in anyway shape or form decrease accuracy. Doesn't slow the bullet down. And you don't need to be very close.

Go to your local Class 3 dealer and ask for a Demo or something. It will be educational and fun.

Blake.
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Old 06-02-2008, 04:41 AM   #17
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Just watched a re-run episode of futureweapons last night. They had the Cheytac featured making a 900yd and a 2500yd+ shot with it. It was suppressed as well. I doubt the bullet would have made it 900yds much less 2500yds if it was slowed to below sonic speeds.
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Old 06-02-2008, 06:54 AM   #18
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Quote:
Originally Posted by Outsider View Post
Isn't that was the military uses silencers now days?

1) Silent
2) Accuracy

And again, when could one get a silencer for a SA-XD40 Service?
today if you wanted to. (minus the waiting time for the stamp)

You can contact some of the Class III dealers in your area, and start the process.

Bar-sto has barrels, and I think you can find them in stock at many of our finer XDtalk sponsors.

Gem-tec uses 9/16-24 threading on their .40 suppressors, but if you're going to order a barrel you should ask the manufacturer of the suppressor that you'll be getting what the threading is.

I thought Pistol-gear was carrying threaded barrels, but I don't see them on the site.
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Last edited by Krackels; 06-02-2008 at 06:44 PM.
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Old 06-02-2008, 10:56 AM   #19
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This is what you need to do for soundless close contact, 1/2 the normal powder gives entry power at close up without the sound, second drill your bullet till 1/2 way down with a drill press pour in mecury and cap with wax or superglue.
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Old 06-07-2008, 02:33 AM   #20
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In some cases suppressors can actually increase velocity with what's called 'free bore boost.' I'm guessing the fellow who claimed suppressors slow bullets down read something once about the MP5-SD (or similar firearms) that ports the barrel close to the chamber to bleed off gases and produce subsonic velocities from ammo loaded to be supersonic.

Of course, .45acp is naturally subsonic. This, plus it being my favorite pistol caliber in general, is why my first suppressor was an SWR HEMS in .45acp. I highly recommend the HEMS and SWR as a company in general.

I'm not a suppressor guru, though, for the hard facts on things I recommend registering at the forums over at SilencerTalk.com. Lurk, search, READ, and if you still have any questions join the discussion. Some of the big wigs for several major suppressor manufacturers are members of that board, including a couple from SWR, so it's a great source of information.

EDIT: Took a pic for you guys, sorry it's fuzzy. Very special thanks to Scott Springer, Chaim of SureSights, and Henry of SWR for making this project a reality. They are all top-notch Gentlemen with whom I hope to do repeat business. [Notice firearm is clear, pointed in a safe direction, and de-cocked.]

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Last edited by selectedmarksman; 06-07-2008 at 06:25 PM.
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