- May 5, 2010
- 6,588
Anyone ever drill a .45 sized can out for 9mm? I'm wondering if it would make it noticeably more quiet with the extra volume and length.
Form 1 .45 can drilled out for 9mm
- Thread starter OLM-Medic
- Start date
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dist1646
Ultimate Member
9mm is smaller than .45.
Give it a try. If you don't like it, or later want to set it up for .45, you just drill bigger holes.
md_al
Active Member
Number of baffles and the tube diameter and length (volume) can offset the hole size. Just make sure the engraving on the can matches what is in the stamp. My 6" .45 can has a .50 inch hole but I used a lot of freeze plugs. It is a little bit more quiet than my my Gemtech GM9 based on iphone recording of both suppressors.
The GM9 is a commercial can and approximates the diameter of the B tube. Whereas my Form1 can is D cell diameter. I've also used the same can on a 16" AR. Barrel looked funny long but works.
I would not use a Form1 tube on an AR with a barrel length <14.5" because of the barrel pressure. IIRC the SD tactical tubes were good for 12500 psi. I tried it once on a 10.5 barrel and it deformed the hole on the 1st freeze plug. If you use other material for the spacers it may be stronger but I have no idea with regards to their psi limit.
https://ndiastorage.blob.core.usgov...0/armament/WednesdayCumberlandPhilipDater.pdf
check page 14 for length vs barrel pressure
- May 5, 2010
- 6,588
The plan was shooting 9mm only. But through a .45 sized can, except drilled with a 9mm hole instead of .45.
Well I think according to the ATF you aren't allowed to change diameter afterwards.
More importantly I don't have any .45s so I would rather have a 9mm sized smaller can if this turns out to be a dumb idea.
Volume would be bigger this way. Baffles would be the same number but larger.
I can't decide if extra sound reduction is worth it over just a regular 9mm size can. It does't seem like the weight is much different, and it only adds a little over an inch in length.
Biggfoot44
Ultimate Member
- Aug 2, 2009
- 33,137
There are more than two factors . The whole field of fluid dynamics, i.e. things like turbulence , phase cancellation, etc .
But the basic design being more or less equivalent , volume is a direct factor .
But the basic design being more or less equivalent , volume is a direct factor .
- Jul 29, 2014
- 49,990
I'll throw this in, just for shitz.and grinz. Why not drill the can out for .45? I believe there will be negligible difference with a larger hole. Volume and length are the key, as others have stated. I use two different cans on my 5.56s, depending on the gun. One is a Surefire 556 socom. The other, a YHM Phantom 762 Lite. I will swear to you, the YHM is the quieter can. It's longer, a little wider, but it does have a .30 caliber hole.
"Well, if I drill it with smaller holes, it will be the much quieter". Maybe, but sure as God made little green apples, you're gonna want a .45 can, down the road, and you'll be kicking yourself in the head.
Just my unsolicited opinion.
"Well, if I drill it with smaller holes, it will be the much quieter". Maybe, but sure as God made little green apples, you're gonna want a .45 can, down the road, and you'll be kicking yourself in the head.
Just my unsolicited opinion.
- May 5, 2010
- 6,588
I just don't ever see myself needing a .45 can. I admit I could be wrong.
- May 5, 2010
- 6,588
147gr 9mm is too right?
I'm trying to limit how many calibers I have to stock up on these days.
Finally figured out how to upload video. Here you go.
https://imgur.com/gallery/R5JgCN7
Sent from my iPhone using Tapatalk
https://imgur.com/gallery/R5JgCN7
Sent from my iPhone using Tapatalk
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