Suppressors YHM problems again...

TxShooter63

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Sep 25, 2007
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I hate to do this but I gain allot of good information from this site so I feel obligated to share my experience.
About 2 months ago I got my YHM Phantom .308 steel suppressor with the quick attach mount after the usual 4 month wait for the ATF. I jumped up and headed to the range after mounting the adapter on my custom built Rem 700 in .300 Win Mag. (Suppressor is rated for .300 Win Mag) I should say that the first thing I found was that the wrench flats on the suppressor mount were so thin that I had grind a flat wrench much thinner so that it would fit between the locking ring and the muzzle shoulder of the barrel. REALLY DUMB design!(YHM later told me they thought it was a dumb design as well so why didn't they fix it?) So, I head to the range and I notice that the suppressor won't screw all the way flush to the locking ring leaving about 1/8" gap. I fire a shot or two as I can't stand the anticipation any longer and all is well.

The next day I call YHM and they have me send the mount and the suppressor back to them at a cost of about $25 for second day shipping that I pay. I tell them I need the suppressor back asap as I am attending a long range class 9 days from the return date. They assure me it will be inspected and returned and 4 days later I find that the suppressor was machined incorrectly and did not have enough clearance for the QD mount. WOW! How does that get past QC? By now I need the suppressor second day air to make sure it arrives for my class and they agree to only pay what UPS ground would cost. I have to pay the rest which is $12 so now I am up to $37 in shipping but I do get the suppressor for the long range class.

Fast forward 8 weeks and 500 rounds later through the bolt action Rem 700 and I am at another long range class. I notice the second morning that my 100 yard cold bore shot has shifted to the right 2 moa. The third morning it has shifted 4 moa total! I finally remove the suppressor at the end of the day and notice that the QD mount is literally disentegrating. It looks like a 5 year old barbeque grill. Keep in mind that I have a very nice Broughton barrel and I keep my strings to 7 or so shots maximum between cool downs so it isn't like this thing has been run on a full auto AR10. Now of course YHM is apparently snowed in and no one is answering the phones. I am sure they will offer to replace the QD mount after I pay more shipping to send the can and mount back because I definitely want the can checked for damage. In all fairness the can shoots fine when all the parts are the right size and overall I am happy with the accuracy but I think YHM has jumped into bed with a suppressor company without keeping an eye on quality!!! I will try to follow up on this and let you know how they handle it but I won't be buying anymore of their products, period.....
 
Re: YHM problems again...

I don;t think it is as bad as it could be really. You paid $37.00 in shipping, that is a lot better then another can and $200.00. I know it sucks that the suppressor was machined incorrectly but thank Gemtax for not being able to remedy that the easy way! So now that you have your new mount you continue to shoot 300WM thru a 308 designed can. Yes, it can "handle" 300WM but it was designed for 308.

That is like buying a new diesel pickup truck and the salesman saying well it will tow 19,000 pounds and you run it hard everyday with 19,500 on it. Ya 500 pounds isnt much but it still pushing the limit. How long do you want to push the limit? I have shot 300WM thru mine and the performance and suppression was not that great, now on their 338 QD model it was great.

I would soak the QD brake in some vinegar overnight and then scrub with an old grille brush that has brass bristles. Should take care of the carbon buildup.

Good luck
 
Re: YHM problems again...

I think their QD brakes are chrome moly steel. That means if you don't take the can off regularly and clean and rust prevent (lubricate) the mounts they will probably corrode pretty thoroughly

The YHM .308 should be fine for .300 win mag, because the wall thickness on the can is probably 1/8". The suppressor is probably built more like products 6-10 years ago, before everything had to be so high performance that a .308 suppressor couldn't be used on a .300 win mag.

It might be possible that the mount is the part having trouble in the .300 win mag application- it's hard to say anything without seeing what surface anomaly is causing the shift.

YHM is the suppressor company. The designs are loosely based on Sound Technology suppressors. They have some sort of working agreement with Mark White on the patents.


 
Re: YHM problems again...

Spoke to YHM and they are sending me another QD mount for free and I purchased a second one for another rifle I just bought. They are charging me shipping on the second mount even though they are going to be in the same box! It was either that or I had to send my original QD back to them and pay shipping so it was a wash.

I wish this was just carbon build up, but it isn't. The metal is actually pitting badly. The metal appears to be way more porous than it should be. I will deal with it and the suppressor does shoot fine other than these mentioned issues. I bought one of the cheaper cans on the market so I can't bitch when the quality is slightly off.

As far as it being rated for a .300 Win Mag, the QD mount is nothing but a flash hider. The can is handling the .300 just fine. This is a metalergy problem, not a pressure problem. Allot of companies rate their .308 suppressors for .300 WM.

I will go ahead and repeat what others have said....Your going to wait for months for the damn thing, go ahead and get a good one!!!!
 
Re: YHM problems again...

I love the YHM cans. They are built like tanks and last forever.

The mounts I think should be remade out of stainless or even better, inconel. I know they would be more money but I would pay the price for a mount that stays like new for longer. Plus, they don't offer a brake style mount, they are all phantom style QD adapters.

I understand the can is meant to handle 300WM but I just don't like pushing the envelope to the extreme everytime I go out to shoot it. I wonder if their new Ti model is going to be 300WM approved....
 
Re: YHM problems again...

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KYS338</div><div class="ubbcode-body">I wonder if their new Ti model is going to be 300WM approved.... </div></div>

I asked this same question before I ordered mine. The guy on the phone said ANY .30 caliber cartridge. Then he specifically said up to 300 RUM. Hope that answers your question.
 
Re: YHM problems again...

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: TxShooter63</div><div class="ubbcode-body">

I wish this was just carbon build up, but it isn't. The metal is actually pitting badly. The metal appears to be way more porous than it should be. I will deal with it and the suppressor does shoot fine other than these mentioned issues. I bought one of the cheaper cans on the market so I can't bitch when the quality is slightly off.

As far as it being rated for a .300 Win Mag, the QD mount is nothing but a flash hider. The can is handling the .300 just fine. This is a metalergy problem, not a pressure problem. Allot of companies rate their .308 suppressors for .300 WM.
</div></div>

Where was it pitting badly? (not doubting you but just interested in wear patterns)

About the only thing that would make sense for altered Point of impact, would be erosion of the aperture near the muzzle through which the bullet passes on its way into the flash hider. That surface on YHM's 5.56 flash hiders is about .145" thick, and is slightly seperated from the muzzle of the firearm. This seems to be pretty minimalist if the same geometry were to be used for .300Win mag- I could see that material yielding and deforming under that kind of pressure.

Most suppressor manufacturers make their mounts of 17-4PH or 15-5PH which is almost identical. The material is stronger and of course corrosion resistant.
 
Re: YHM problems again...

At this point I have no way of knowing that the cold bore shift is suppressor related as I haven't taken the rifle apart yet. I can only guess that is the problem but the corrosion is definitely serious. It is occuring in the body of the flash hider which consists of small ridges and indentions. The ridge areas are pitting badly and nearly worn down to the level of the indentations. Again, this is not carbon in the indentations, this is metal that is gone and allot of it.
There is a good chance the cold bore shift is related to something else. The problem with the suppressor was just the first abnormal thing I found. There are many, many things that could cause the cold bore shift and my guess is the suppressor mount, while clearly failing, isn't the problem.
 
Re: YHM problems again...

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 762frmafr</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KYS338</div><div class="ubbcode-body">I wonder if their new Ti model is going to be 300WM approved.... </div></div>

I asked this same question before I ordered mine. The guy on the phone said ANY .30 caliber cartridge. Then he specifically said up to 300 RUM. Hope that answers your question. </div></div>

Hmm well I think its time to order my YHM Ti !!
 
Re: YHM problems again...

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jonaddis84</div><div class="ubbcode-body">Slightly off topic...is YHM's website working for anyone else?</div></div>

working fine for me Jon. Im using IE and Chrome and both are working ok.
 
Re: YHM problems again...

I have a 7.62 Phantom QD. Been using it for about a year and I've yet to see any issue with the adaptors except the fact that they are UGLY.
I am pleased with its sound suppressing ability and it is built like a tank. Price was good too. It is correct that they use Mark White technology and it is not anything new or innovative.
I have a direct mount suppressor in 5.56/223 and if I had gotten it first would have done the same in 30 caliber.
I have a very good friend who is close by and takes good care of me on extra adaptors and accessories.
And YHM has always answered the phone and been courteous when I called with a question.
 
Re: YHM problems again...

Once I cleaned the flash hider/mount throroughly it became obvious that there was very little pitting in the metal and certainly not enough to be causing my cold bore to move 4 inches. I am going to strip the rifle down and check everything. YHM took care of me on the replacement adapter so I am happy. In all fairness, the more I look at the suppressor the more impressed I am with how well it is built. It is heavy but I suspect it is almost indestructible.
 
Re: YHM problems again...

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: TxShooter63</div><div class="ubbcode-body">Once I cleaned the flash hider/mount throroughly it became obvious that there was very little pitting in the metal and certainly not enough to be causing my cold bore to move 4 inches. I am going to strip the rifle down and check everything. YHM took care of me on the replacement adapter so I am happy. In all fairness, the more I look at the suppressor the more impressed I am with how well it is built. It is heavy but I suspect it is almost indestructible. </div></div>

Moving 4 inches at what range? I run the 762 on my 10.5 and 7" ARs until I get a smoke show and haven't had any break down in the QDs. I would expect some POI shift but not that much...at 100-300 meters.
 
Re: YHM problems again...

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: DougW</div><div class="ubbcode-body">I've shot the piss outta mine on several different weapons and calibers with no problems at all! Heavy as hell but good to go! </div></div>

X2. I run mine on Ar10, Rem 700, and 7.62x39AR, its seen quite a few rounds with no probs. Heavy-Yes, Heavy=Heavy Duty sometimes too.
 
Re: YHM problems again...

I should have my Ti 7.62 Phantom any day now. I like the YHM offerings because they are built like a brick shithouse and they have never let me down. My buddy I shoot with has one and its his only 30 cal rifle can. He shoots it on a 308, 6.5CM, 6.5G and he used to shoot it on a AR10. He has a LOT of rounds down range between those 3 and beat that can to death traveling with it. Keeps on performing.

Thumbs way up for YHM cans.