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Poor CS - GemTech

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Rancid Coolaid View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rancid Coolaid Quote  Post ReplyReply Direct Link To This Post Posted: February/19/2020 at 13:22
My gemtech rifle cans do not come apart.

I'd take a good look at the inside (focused mostly on the side opposite the final strike), then put it on a gun of known accuracy. If it really messes with accuracy, either looks for ways to address it at caliber or make it a dedicated sub-caliber can.
If the 30-cal use is buggered, it might be far less so at 223.

But all-around, it sucks.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote budperm Quote  Post ReplyReply Direct Link To This Post Posted: February/20/2020 at 09:24
Sounds like my kinda luck......  Say What
"Peace is that brief glorious moment in history when everybody stands around reloading".
--Thomas Jefferson



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koshkin View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote koshkin Quote  Post ReplyReply Direct Link To This Post Posted: February/20/2020 at 09:43
That is good info about 110gr Vmax coming apart.  

If I were you, I would talk to Hornady about it.  BSF barrels twist rate is not that fast for Blackout.  Were you shooting handloads? or factory ammo?

I have two 300 Blackout barrels with 1 in 5" twist and one with 1 in 7 " twist.  I mostly shoot subsonics, but it sounds like I need to be careful with supersonic stuff.

ILya
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Rancid Coolaid View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rancid Coolaid Quote  Post ReplyReply Direct Link To This Post Posted: February/20/2020 at 10:07
Yea, reading his post made me think of my recent testing a Noveske-barreled 300BO with Barnes vor-tx 110s, I just screwed on the can and loosed the gods of war, no worries about can health.

Because I like to party!

The best way to learn is from the experiences of others. And cheaper too!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SVT_Tactical Quote  Post ReplyReply Direct Link To This Post Posted: February/20/2020 at 10:44
These are factory hornady black ammo.
"Most folks are about as happy as they make their minds up to be" - Abraham Lincoln
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Post Options Post Options   Thanks (0) Thanks(0)   Quote koshkin Quote  Post ReplyReply Direct Link To This Post Posted: February/20/2020 at 18:11
Originally posted by SVT_Tactical SVT_Tactical wrote:

These are factory hornady black ammo.

Yiou may want to see what Hornady thinks about that.  Vast majority of Blackout barrel out there are either 1-7" twist or 1-8" twist.  If they sell loaded ammo for that caliber, it better be able to work in most commonly available barrels.

ILya
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Post Options Post Options   Thanks (0) Thanks(0)   Quote koshkin Quote  Post ReplyReply Direct Link To This Post Posted: February/20/2020 at 18:15
RC, it is sort of a coincidence that almost the only supersonic ammo I have on hand has Barnes 110gr monolithic bullet.

I think I still have some Fron S&B with 150gr FMJ bullets, but everything else is subsonic.

There is some work being done on Blackout barrels that are even faster twist than the 1-5" I have here, but that will require a very different bullet construction to work at supersonic speeds.

ILya
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RifleDude Quote  Post ReplyReply Direct Link To This Post Posted: February/20/2020 at 19:11
Vmax bullets are very thin jacketed, very frangible varmint bullets intentionally designed to basically grenade upon impact with the flesh of vermin. There’s nothing wrong with the bullets; they’re doing what they’re designed to do; they just don’t play well with super fast twists. They are right on the jagged edge of almost flying apart with moderately high velocities and moderate twists. 

Barrels for .300 BLK were designed to stabilize long, heavy bullets from 190 gr to 220 gr at subsonic velocities, so they have 1:7 or faster twists. They will still shoot lighter bullets just fine as long as the bullet isn’t extremely frangible like Vmaxes, BlitzKings, Varmint Grenades, etc. It ain’t an issue of weight, it’s an issue of jacket thickness and/or overall construction.
Ted


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Post Options Post Options   Thanks (0) Thanks(0)   Quote RifleDude Quote  Post ReplyReply Direct Link To This Post Posted: February/20/2020 at 19:16
Originally posted by koshkin koshkin wrote:

Originally posted by SVT_Tactical SVT_Tactical wrote:

These are factory hornady black ammo.

Yiou may want to see what Hornady thinks about that.  Vast majority of Blackout barrel out there are either 1-7" twist or 1-8" twist.  If they sell loaded ammo for that caliber, it better be able to work in most commonly available barrels.

ILya

Yeah, they shouldn’t be using Vmaxes in that ammo. Maybe they didn’t have issues in their testing, or maybe it will work ok in an 8 twist barrel. It’s a risky choice on their part for sure.

Ted


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Post Options Post Options   Thanks (0) Thanks(0)   Quote koshkin Quote  Post ReplyReply Direct Link To This Post Posted: February/20/2020 at 19:45
Originally posted by RifleDude RifleDude wrote:

Originally posted by koshkin koshkin wrote:

Originally posted by SVT_Tactical SVT_Tactical wrote:

These are factory hornady black ammo.

Yiou may want to see what Hornady thinks about that.  Vast majority of Blackout barrel out there are either 1-7" twist or 1-8" twist.  If they sell loaded ammo for that caliber, it better be able to work in most commonly available barrels.

ILya

Yeah, they shouldn’t be using Vmaxes in that ammo. Maybe they didn’t have issues in their testing, or maybe it will work ok in an 8 twist barrel. It’s a risky choice on their part for sure.


Exactly.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SVT_Tactical Quote  Post ReplyReply Direct Link To This Post Posted: February/21/2020 at 07:57
Might give them a call.
 
Not going to hold my breathe they will do anything though.
 
"Most folks are about as happy as they make their minds up to be" - Abraham Lincoln
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Post Options Post Options   Thanks (0) Thanks(0)   Quote budperm Quote  Post ReplyReply Direct Link To This Post Posted: February/21/2020 at 08:11
Worth a try G!!!  They just might offer to give you a new box of rounds....   Not that it would help...
"Peace is that brief glorious moment in history when everybody stands around reloading".
--Thomas Jefferson



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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rancid Coolaid Quote  Post ReplyReply Direct Link To This Post Posted: February/21/2020 at 08:34
I would think, at this point, a free box of rounds would be somewhat akin to a slap in the face. Kinda like saying, "Here, go ruin another can."
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Post Options Post Options   Thanks (0) Thanks(0)   Quote budperm Quote  Post ReplyReply Direct Link To This Post Posted: February/21/2020 at 10:00
True Dat!
"Peace is that brief glorious moment in history when everybody stands around reloading".
--Thomas Jefferson



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Post Options Post Options   Thanks (0) Thanks(0)   Quote SVT_Tactical Quote  Post ReplyReply Direct Link To This Post Posted: February/21/2020 at 10:41
Going to wait until I have the box in hand so I can give them the lot #, I'm sure they will want it.
"Most folks are about as happy as they make their minds up to be" - Abraham Lincoln
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SVT_Tactical Quote  Post ReplyReply Direct Link To This Post Posted: February/22/2021 at 10:29
Just realized I never updated this thread. 

Did talk to hornady and huntershack.  neither would do anything remotely considered helpful in this scenario.  

Hornady did offer to evaluate my remaining ammo and replace with a different gr bullet if my gun didn't like the 110s. 

Gemtech did not come apart.  I did clean up the exit hole with a dremel and have still been using the can.  No adverse affects on other guns except  slightly more POI shift when going from un-suppressed to supppressed



I relegated the remaining 110s to a gun that I don't run suppressed.  They have been since reloaded with Barnes 110 tac bullets that run fine. 
"Most folks are about as happy as they make their minds up to be" - Abraham Lincoln
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