Help me pick a rifle for subsonic suppressed project

[jjohnson]

.45 1917 Enfield Bolt/Single Shot

Great topic. Mine isn't suppressed, but I have neighbors closeby and load to subsonic levels just to keep them happy. I have a full bull barrel in .45ACP on my Enfield, and it's a real pussycat. Since I have a chronograph and loading software, custom loading to max while still subsonic is an easy excercise and makes good use of that (one) .45 bullet. I had considered, since it's a singleshot, having it rechambered to .45 Win Mag and using even heavier bullets at 1050 fps or so, but haven't seen a real reason yet to go there. My range is limited to 70 yards or so, so the trajectory isn't a big deal as I'm sighted to 50 yards. I'm half tempted to have the MUZZLE end - get this - chambered for 45 win mag so I can yank the barrel and turn it around, (and back again) but I'd have to make a custom muzzle cap.... and in the end, it would just be an interesting engineering project. I really don't want to go through the red tape on the suppressor but have thought about tinkering with a brake with enough 'baffle' to help noise a little without being illegal. The Camp 9 is a fun rifle, have one, but even 147-grain hollow points loaded up to the supersonic edge just don't have a lot of "whack" so I usually use the .45 instead. Anybody care to share data on some of these pistol bullets actually expanding (like they should) at 1000-1050 fps? Thanks.

 

[taliv]

"here's a picture of one of my suppressor projects"
Where is the suppressor ?

waiting on my stamp

 

[BrennanKG]

Taliv,

Both of the companies below provide USC to UMP conversions.
Have you or any of the others here heard anything about either?
I would LOVE to get my USC "UMP'd", SBR'd, and suppressed when we get to TX.

http://www.tacticalexcellence.com/home.html

http://www.top-notchparts.com/


Thanks,
B.

 

[taliv]

brennan, i know a little about topnotch. i bought a fisher ent m4dc can from a guy who was apparently buddy-buddy with topnotch and did a lot of their machining. i.e. they subbed machine work for the ump conversions, among other things, to him. as far as i can tell, his work is excellent, and i think (excepting bear coat and les baer) excellent people tend to hang together.

but that's not really much of an endorsement, as i've never put my hands on an actual topnotch conversion.

i also have an SL8 that i would like to get a g36 conversion done to, but so many other projects are ahead of it...

 

[Jonathan]

444, unfortunately, that's not mine. That particular rifle is used by a wildlife official in northern Europe (Finland, IIRC) to dispatch wounded animals (hit by cars etc) in populated areas during the 24-hour darkness they have part of the year.


I could probably find the contact information if you're really interested.



The 45-70 just seems like the best bet for what he's describing. Although I've heard that a totally quiet suppressed firearm is overrated, and supersonic shouldn't be avoided, if you want subsonic, then you might as well go big. Besides, a 45-cal can be used on essentially any caliber you have, with varying efficiency. It should be great with a 458 and of course overkill on 45ACP. How about .406 or .338? We can't all have a toy collection like Zak Smith, so the way I see it, diversity is your friend.

 

[jjohnson]

T/T Encore?

Just thinking, gents....

Hey, any reason not to consider say, a T/C Encore in whatever caliber makes you happy, but the can only on that barrel, and go from there? You can get the carbine stock and if you pay attention to the rules (barrel must be at least 16 inches) stay within the law. Seems like if you wanted the 300 Whisper this would be a snap.... or if you're into loading anything common like .45 acp, same deal.... if you're handloading you could just take any of your favorite rounds and calculate a subsonic load for whatever you're playing with. The noise made by the hammer fall on a T/C isn't much at all compared to the 'thump' of whatever you'd be hitting. Just a thought.

 

[Bigfoot]

Here's a link to a 300 Whisper forum http://www.quarterbore.net/forums/forumdisplay.php?f=27 It's a great place to kick around ideas, kinda slow though.

Here's an interesting quote from somebody there, I need to send him a PM to nail him down but maybe someone here can explain.

"I see you are on one of my favorite subjects again but don't forget one of the oldest rules about the sound level of subsonic ammo. The sound pressure level is directly proportional to the cross sectional area of the bullet or in other words .45 is one of the hardest ones to quiet and .17 is one of the easiest. Fast burning powder in a long barrel will get you started and most go middle road with 9mm or 308 to get the quietest with the most energy delivered to the target."

http://www.quarterbore.net/forums/showthread.php?t=816

 

[beerslurpy]

Wow, this is an old thread. I decided on a cav arms/oly arms 45 carbine with an SRT suppressor. Best of everything, basically. I'm almost done putting together the gun itself, but there are probably at least a few months of waiting ahead of me before I finish this project.

All I'm waiting on (besides sending the upper off to SRT) are my yankee hill quad rail and my Oly Arms upper, both of which which should arrive sometime next week. In theory. Oly is apparently (I now discover) known for irrationally long backlogs. Still, the wait should totally be worth it.

 

[RWBlue01]

bump
I have been playing with the 300-221.
I am looking for the right supersonic bullet. Any suggestions?

 

[Ranb]

I shoot the 300 whisper on a TC carbine and AR15, 338 whisper on a rebarreled savage, 458 socom on AR15 and the 510 whisper on an Encore. The 510 is punishing, the 458 is not as long as it stays subsonic, the 300 is mild, and the 338 is not punishing but hits hard with a 300 grain or heavier bullet.

The 510W is easy to put on an Encore, but requires a custom barrel for a Sako or Remington action. The 338 and 458 are easy to chamber in any 308 rifle, especially the savage as long as the barrel maker can supply a 1-8 for he 338 and 1-12/14 for the 458. Anything can be made to shoot the 300W, but you need a 1-8 twist to stablise the 240 grain bullets.

Another idea would include 45 Win Mag in a bolt gun.

125 grain Nozlers work well for supersonic 300 whisper.

Ranb