Search found 1110 matches

by a_canadian
Thu Dec 05, 2019 4:14 pm
Forum: Silencersmithing Forum
Topic: sd tactical three lug issues
Replies: 2
Views: 224

Re: sd tactical three lug issues

With the cost in $$$ for a decent can, or even more in labour put into making one, the quickest attachment method I'd trust would be coarse acme threads with a very square shoulder to stop against. Unless it was on an integral with at least a few inches of overlap on the barrel, then a 3-lug would b...
by a_canadian
Wed Dec 04, 2019 3:55 am
Forum: Legal and Political
Topic: Texas wants death penalty for no knock raid when officer killed
Replies: 2
Views: 92

Re: Texas wants death penalty for no knock raid when officer killed

I knew a kid in high school who liked saying 'some days you get the bear, some days the bear gets you.' Seems to apply in this case. The guy is going down, one way or another, because police don't like one of their own getting shot in the face. Doesn't matter to them that they misbehaved in ways whi...
by a_canadian
Fri Nov 29, 2019 7:09 pm
Forum: Silencersmithing Forum
Topic: K baffles and 9mm blowback
Replies: 15
Views: 340

Re: K baffles and 9mm blowback

The more ports you make (or larger ports), the less pressure is available to cycle the action. if you port too much gas out of the barrel to anywhere else, there is not going to be enough left to cycle. ... And while barrel ports weren't what I was referencing, as the initial question was regarding...
by a_canadian
Thu Nov 28, 2019 11:49 pm
Forum: Silencersmithing Forum
Topic: K baffles and 9mm blowback
Replies: 15
Views: 340

Re: K baffles and 9mm blowback

Depends on multiple factors. I'd suggest you consider blast chamber volume before baffle type when figuring out blowback pressure. In general, for subsonics, you're going to get the best suppression efficiency on first shot with the smallest practical blast chamber. A gap of around 1/4" between muzz...
by a_canadian
Wed Nov 27, 2019 11:56 am
Forum: Silencersmithing Forum
Topic: Drilling Misshap
Replies: 62
Views: 9589

Re: Drilling Misshap

I used 0.25" for anything longer than about 4" for a couple of years, but found that accuracy suffered a bit due to surface effects. Of course alignment is critical with any hole size to avoid clipping the baffles with the pellet, but provided your concentricity with the barrel bore is pretty much p...
by a_canadian
Tue Nov 12, 2019 11:44 am
Forum: Silencersmithing Forum
Topic: Lots of holes
Replies: 9
Views: 720

Re: Lots of holes

In looking around for a clear image of the potato's internals, I found some updates on James' pricing and other related stuff. Seems this baby has come down from $5,000 to a mere $3,000. And he's got a new one which he describes as as something like a Hiram Maxim redux. OMG indeed. Best metering inf...
by a_canadian
Tue Nov 12, 2019 12:04 am
Forum: Silencersmithing Forum
Topic: Lots of holes
Replies: 9
Views: 720

Re: Lots of holes

... I'm getting flashbacks of the sweet potato from some of this...

Image
by a_canadian
Sun Nov 10, 2019 10:22 pm
Forum: Silencersmithing Forum
Topic: K Baffle waist channel and aerodynamic issues
Replies: 6
Views: 778

Re: K Baffle waist channel and aerodynamic issues

Fair enough. For what it's worth, I've only used K baffles with subsonic .22lr and air rifles. With various barrels on each I've seen significant but repeatable POI shift. There are surface effects as the projectile transits an asymmetrical set of baffle features, some pressure ahead of the bullet o...
by a_canadian
Sat Nov 09, 2019 2:12 am
Forum: Silencersmithing Forum
Topic: K baffle and more/less blowback
Replies: 2
Views: 272

Re: K baffle and more/less blowback

Between this thread and the other - http://www.silencertalk.com/forum/viewtopic.php?f=10&t=156492 - it doesn't seem like you're understanding what K baffles are at all. Stubbornly so. A K baffle is not a K baffle without those holes. If you don't make the two cuts, one in the face of the baffle to s...
by a_canadian
Tue Nov 05, 2019 10:27 pm
Forum: Silencer Talk
Topic: Drop tests
Replies: 3
Views: 190

Re: Drop tests

Seems likely that in most cases a suppressor will survive a direct angular impact while the muzzle might snap off at the base of the threading, depending on how the end of the threads and transition to shoulder has been cut. It seems fairly common to have a significant stress riser carved into the t...
by a_canadian
Tue Nov 05, 2019 8:48 pm
Forum: News Stories
Topic: New Zealand Gun Confiscation, not so successful
Replies: 2
Views: 165

Re: New Zealand Gun Confiscation, not so successful

They have another month and a half to comply before becoming 'criminals' in the eyes of the law of New Zealand. Just a wild-assed guess, but I'd suggest we might see the compliance rate double or slightly more by closing time. 40%-ish, maybe even as high as 50%, considering how squeamish many are ab...
by a_canadian
Sun Nov 03, 2019 5:56 pm
Forum: Silencersmithing Forum
Topic: 9x39 project
Replies: 75
Views: 6239

Re: 9x39 project

A syringe with white lithium grease to top up the first baffle or two every couple of dozen shots. A modest coating of the grease on the faces of the first two baffles whenever you rebuild the stack at cleaning time. Works for me, if only in subsonic .22lr.
by a_canadian
Wed Oct 30, 2019 11:52 am
Forum: Silencersmithing Forum
Topic: K Baffle waist channel and aerodynamic issues
Replies: 6
Views: 778

Re: K Baffle waist channel and aerodynamic issues

I've not seen that. A non-round bore in a K baffle? Never seen it. Sounds like a strangely made K baffle. Cone baffles, sure, especially since Rusty's DHC clipping became popular. But not a K.
by a_canadian
Wed Oct 30, 2019 10:41 am
Forum: Silencersmithing Forum
Topic: K Baffle waist channel and aerodynamic issues
Replies: 6
Views: 778

Re: K Baffle waist channel and aerodynamic issues

Not clear what you mean by channel. K baffles typically have an asymmetrical pair of cuts, one in the face to direct gas pressure across the bore, and one in the waist opposite the first to allow some of that cross bore stream to pass into the area outside the baffle. This can definitely cause some ...
by a_canadian
Tue Oct 15, 2019 2:30 am
Forum: Silencer Talk
Topic: Help! Why are my 9mm always louder than my 300blk???
Replies: 4
Views: 962

Re: Help! Why are my 9mm always louder than my 300blk???

Remington UMC 147gr leave the muzzle if my carbine at 1040fps. 18.75" barrel. Shoots accurately. Seems a good choice for suppressed use.
by a_canadian
Wed Oct 02, 2019 12:27 pm
Forum: Rifle Discussion
Topic: Scope question
Replies: 1
Views: 356

Re: Scope question

Being a silencer forum it seems an odd place to look for scope advice. Here's a thread from 2015 with a similar question involving the two brands you're referencing, if not the exact models: https://www.ar15.com/forums/ar-15/Monstrum_or_Vokul/18-680889/ I concur with the prevailing opinion there, in...
by a_canadian
Sat Sep 28, 2019 12:20 am
Forum: Silencer Talk
Topic: Suppressor on Ruger PC9 Carbine?
Replies: 11
Views: 5360

Re: Suppressor on Ruger PC9 Carbine?

Probably a decent choice, but I'm likely to stick with what's readily available. No Fiocchi 9mm showing up in any retailers to which I have access, though they seem to have that brand in .357 and .45. The Remington UMC cycles well, is reasonable on the ears, pokes holes close together on target, so ...
by a_canadian
Fri Sep 27, 2019 10:18 pm
Forum: Silencer Talk
Topic: Suppressor on Ruger PC9 Carbine?
Replies: 11
Views: 5360

Re: Suppressor on Ruger PC9 Carbine?

Thanks a lot for your insights. I'll not waste my time and risk damaging something with that little project. In the case of the TNW Aero, perhaps the more significant bolt carrier weight and the chunk of steel they put into the front of the spring is enough to keep port noise lower than those other ...
by a_canadian
Fri Sep 27, 2019 1:26 pm
Forum: Silencer Talk
Topic: Suppressor on Ruger PC9 Carbine?
Replies: 11
Views: 5360

Re: Suppressor on Ruger PC9 Carbine?

Hi ECCO. Sounds like you've tested holding the bolt closed, if you're saying it hurts. So I'm wondering if you have a guess as to how much metal might be needed to assure reliable, durable bolt restraint, as an add-on for a 9mm PCC. Have a different model of 9mm takedown carbine and more specificall...
by a_canadian
Sat Sep 14, 2019 3:10 am
Forum: Silencersmithing Forum
Topic: MP5 SD suppressor design - Blast chamber
Replies: 2
Views: 1077

Re: MP5 SD suppressor design - Blast chamber

If you're talking about vent holes going back into a reflex volume, a portion of the can extending back over the barrel, then one advantage is a reduction in pressure on your blast baffle and to the baffle stack overall. Maybe not a massive difference but something. And suppressor efficiency is larg...
by a_canadian
Fri Sep 13, 2019 1:03 am
Forum: Silencer Talk
Topic: Coatings to support cleaning
Replies: 4
Views: 1092

Re: Coatings to support cleaning

White lithium grease on the first couple of baffles helps a lot, remains useful towards ease of cleaning for a few magazines' worth of .22lr anyway. Some people have baked baffles in a tin of mineral oil and reported success - there's a specific procedure outlined for cleaning and soaking somewhere....
by a_canadian
Tue Aug 27, 2019 5:36 pm
Forum: Silencersmithing Forum
Topic: Baffles for my airgun
Replies: 6
Views: 1018

Re: Baffles for my airgun

Is there a good rule of thumb for calculating how much space there needs to be in the baffle section? Right now, cone trimmed, I am looking at 3ish inches. But I am looking at making a shroud from carbon fiber and could go a few inches longer if that would help (vs shortening the barrel). Also, is ...
by a_canadian
Tue Aug 27, 2019 1:41 pm
Forum: Silencersmithing Forum
Topic: Baffles for my airgun
Replies: 6
Views: 1018

Re: Baffles for my airgun

Anything above about 10fpe and felt wraps and hair curlers start coming apart. I had felt strips glued at the ends, loosely filling the void around K baffles in a 23fpe PCP in .22", and after roughly 1,000 pellets through it at that power level the felt started pulling into the bore in the first 3 b...
by a_canadian
Sun Aug 25, 2019 6:22 pm
Forum: Silencersmithing Forum
Topic: 458 Socom - Lets Talk!
Replies: 15
Views: 1977

Re: 458 Socom - Lets Talk!

Add to that ECCO's fairly strongly stated sentiment that reflex volumes mean next to nothing in terms of suppression efficiency, and yeah, seems like all that weight is a bit excessive. I'd suggest keeping your design if ruggedness in terms of dropping/bashing the rifle is a concern, but switching t...
by a_canadian
Sat Aug 24, 2019 3:47 am
Forum: Silencersmithing Forum
Topic: 458 Socom - Lets Talk!
Replies: 15
Views: 1977

Re: 458 Socom - Lets Talk!

Planning on using 1.75 OD x 0.65 Wall 316 SS tubing. Just noting your type, because hey, little errors can become painfully big errors because of typos. If you use stainless tubing with a wall thickness of 0.65" it's going to weigh about 5 pounds. Probably better going with 0.065" wall. But you kno...