Thunderbeast RR end cap adapter group buy - 338 ultra and magnus

#101
Man is it hot here in AZ, going to have to work nights this year.
There was a question about caliber, for an FYI I have a 30 cal can and the through diameter is .450,,, I'm guessing the 338 cans are .100 plus over bullet diameter (I could use a measurement for those)
The RR brake weighs in at 3 1/8 oz (88 grams) and the prototype flat cap weighs in at 3 3/4 oz (108 grams)
Keep in mind I was unable to find a good pc of Ti without ordering so this part is all 304 stainless. The Ti version will for sure be lighter than the Brake.
tbac 1.jpgtbac 2.jpg
 
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#102
Mulepackhunter said:
Man is it hot here in AZ, going to have to work nights this year.
There was a question about caliber, for an FYI I have a 30 cal can and the through diameter is .450,,, I'm guessing the 338 cans are .100 plus over bullet diameter (I could use a measurement for those)
The RR brake weighs in at 3 1/8 oz (88 grams) and the prototype flat cap weighs in at 3 3/4 oz (108 grams)
Keep in mind I was unable to find a good pc of Ti without ordering so this part is all 304 stainless. The Ti version will for sure be lighter than the Brake.
View attachment 8725342View attachment 8725343
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That looks fantastic
 
#106
Ran it through a stress relief heat cycle and gave its own coating which is tough to do on stainless. Ill try it on the Ti as well. The Ti will tend to go purple and black and the collar will still be stainless so it should be black like this one. Will give it some protection.
Theres enough interest now so I will order material for 10 parts this week. Also going to shoot 28 Nosler this week before shipping this out.

black tba cap.jpg
 
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#107
Mulepackhunter said:
Ran it through a stress relief heat cycle and gave its own coating which is tough to do on stainless. Ill try it on the Ti as well. The Ti will tend to go purple and black and the collar will still be stainless so it should be black like this one. Will give it some protection.
Theres enough interest now so I will order material for 10 parts this week. Also going to shoot 28 Nosler this week before shipping this out.

View attachment 8726915
Click to expand...
Appreciate the update Sir.
 
#108
Mulepackhunter said:
Ran it through a stress relief heat cycle and gave its own coating which is tough to do on stainless. Ill try it on the Ti as well. The Ti will tend to go purple and black and the collar will still be stainless so it should be black like this one. Will give it some protection.
Theres enough interest now so I will order material for 10 parts this week. Also going to shoot 28 Nosler this week before shipping this out.

View attachment 8726915
Click to expand...
Looks great. Thank you!
 
#110
Mulepackhunter said:
Ran it through a stress relief heat cycle and gave its own coating which is tough to do on stainless. Ill try it on the Ti as well. The Ti will tend to go purple and black and the collar will still be stainless so it should be black like this one. Will give it some protection.
Theres enough interest now so I will order material for 10 parts this week. Also going to shoot 28 Nosler this week before shipping this out.

View attachment 8726915
Click to expand...
Oh something I’d recommend would be to make the hole have a lower cross sectional width.

I’m part of the form 1 suppressor forum and there have been a lot of discussions when it comes to POI shift when it comes to end cap thickness.
The general consensus that was reached was the less the better or you can get a tunnel effect where the gasses pass around the projectile, bounce off the walls of the cap and cause instability.
This does apply less and less the greater the difference in size is between the bore and projectile. So a bigger hole, less poi but also more decibels. A thin wall for the hole + the appropriate .06-.085 overbore diameter eliminates the POI shift.
 
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#111
Archimedes said:
Oh something I’d recommend would be to make the hole have a lower cross sectional width.

I’m part of the form 1 suppressor forum and there have been a lot of discussions when it comes to POI shift when it comes to end cap thickness.
The general consensus that was reached was the less the better or you can get a tunnel effect where the gasses pass around the projectile, bounce off the walls of the cap and cause instability.
This does apply less and less the greater the difference in size is between the bore and projectile. So a bigger hole, less poi but also more decibels. A thin wall for the hole + the appropriate .06-.085 overbore diameter eliminates the POI shift.
Click to expand...

Interesting. Would have the added benefit of lighter weight too. I’ll have my 375 version in hand this week and can measure bore diameter of it.
 
#116
Let some rounds go today with the new flat cap. 10 round mag AR10 308 ,, 20 round mag 300 blk ,, and 3 rounds of 28 Nosler Bolt gun. All ran no issues. 300 blk SBR was super quiet. None needed ear protection but 308 and 28 Nosler had some noise as would be expected.
This cap has no wrench slot but did not budge with hand tightening. Broke it loose at home and hit the cap with my knuckle and it popped free of the taper.
I will still add the wrench slot.
 
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#119
I'm in for one if this gets off the ground—I've been running a TBAC 338 Ultra SR on my 300 Norma for a while now, and the idea of swapping to Dead Air end caps for better modularity sounds spot on, especially for dialing in performance on sub-.338 calibers without the brake inducing extra blowback. Thunderbeast's own whitepapers back up the gas management benefits you mentioned, Archimedes, though I'd be curious about any real-world dB reduction data from users who've modded similar setups (e.g., via Area 419's Maverick adapters).

Quick question on the design: With the taper interaction, are we looking at a torque spec recommendation for installation to ensure it seats properly without risking thread galling on the Ti? Also, if the group buy hits that 15+ threshold, any chance to bundle in a basic thread protector as an add-on for those exposed threads when the brake's off?
 
#121
Looks like they made them all .450
I did some testing myself and have seen testing on muzzle brake diameter and diameter matching the caliber didn't have any measurable effect on accuracy or speed. So weather you had .010 Clearence or .100 didn't seem to matter. Makes it much easier for them to produce and not get them mixed up. On muzzle brakes it was all about port size and angle.
 
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#122
TM451 said:
I'm in for one if this gets off the ground—I've been running a TBAC 338 Ultra SR on my 300 Norma for a while now, and the idea of swapping to Dead Air end caps for better modularity sounds spot on, especially for dialing in performance on sub-.338 calibers without the brake inducing extra blowback. Thunderbeast's own whitepapers back up the gas management benefits you mentioned, Archimedes, though I'd be curious about any real-world dB reduction data from users who've modded similar setups (e.g., via Area 419's Maverick adapters).

Quick question on the design: With the taper interaction, are we looking at a torque spec recommendation for installation to ensure it seats properly without risking thread galling on the Ti? Also, if the group buy hits that 15+ threshold, any chance to bundle in a basic thread protector as an add-on for those exposed threads when the brake's off?
Click to expand...

The threads won’t be exposed as you will either have the RR brake on there, or the flat end cap. I’m not sure why you would need or want a thread protector as you won’t be shooting the can without one or the other installed.

There’s no torque spec that I’m aware of from thunderbeast in regards to the RR brake. Use the spanner wrench, make it tight, and then break it loose by hand or with a breaker bar/ ratchet as the spanner wrench has a provision for a 3/8 drive.
 
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#123
Krob95 said:
The threads won’t be exposed as you will either have the RR brake on there, or the flat end cap. I’m not sure why you would need or want a thread protector as you won’t be shooting the can without one or the other installed.

There’s no torque spec that I’m aware of from thunderbeast in regards to the RR brake. Use the spanner wrench, make it tight, and then break it loose by hand or with a breaker bar/ ratchet as the spanner wrench has a provision for a 3/8 drive.
Click to expand...
He’s talking about the other version, the one that will have internal threads for a da cap. That one the threads would be exposed if you don’t have the rr brake on.
 
#125
TM451 said:
I'm in for one if this gets off the ground—I've been running a TBAC 338 Ultra SR on my 300 Norma for a while now, and the idea of swapping to Dead Air end caps for better modularity sounds spot on, especially for dialing in performance on sub-.338 calibers without the brake inducing extra blowback. Thunderbeast's own whitepapers back up the gas management benefits you mentioned, Archimedes, though I'd be curious about any real-world dB reduction data from users who've modded similar setups (e.g., via Area 419's Maverick adapters).

Quick question on the design: With the taper interaction, are we looking at a torque spec recommendation for installation to ensure it seats properly without risking thread galling on the Ti? Also, if the group buy hits that 15+ threshold, any chance to bundle in a basic thread protector as an add-on for those exposed threads when the brake's off?
Click to expand...
Other people that have tested sub caliber end caps on other suppressors show a great increase in performance, upwards of 7db I believe.
The one I’m thinking of was 556 on a 45 cal can. The dedicated cap was far far quieter than the 45 cal cap.
 
#126
Archimedes said:
Other people that have tested sub caliber end caps on other suppressors show a great increase in performance, upwards of 7db I believe.
The one I’m thinking of was 556 on a 45 cal can. The dedicated cap was far far quieter than the 45 cal cap.
Click to expand...
Having a couple Hybrid 46 cans with various end caps. I've changed to the .223 endcap when shooting 5.56. the sound isn't discernable to my ear. Now with sophisticated devices i have no doubt a difference can be found. Yet naked ear detector cant tell. I say that to say this. Id be more inclined to want the end cap to be the same ID as what TBAC made.

TBAC made it that way for a reason. They have the experience and technology to make it. So wouldn't it be reasonable to think if the ID of the endcap was a huge deal that they would have made them with various ID's?
 
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#127
Krob95 said:
The threads won’t be exposed as you will either have the RR brake on there, or the flat end cap. I’m not sure why you would need or want a thread protector as you won’t be shooting the can without one or the other installed.

There’s no torque spec that I’m aware of from thunderbeast in regards to the RR brake. Use the spanner wrench, make it tight, and then break it loose by hand or with a breaker bar/ ratchet as the spanner wrench has a provision for a 3/8 drive.
Click to expand...
Cool, Archimedes—makes sense that the RR brake or flat cap keeps threads safe, so a protector’s overkill unless you’re stashing the can long-term. Torque-wise, TBAC doesn’t give a number for the RR brake, but 20-30 ft/lbs with some anti-seize should keep Ti threads happy. Not much dB data on TBAC-to-Dead Air swaps yet, but stuff like Area 419’s Maverick shows 2-5 dB drops with flat caps on smaller calibers, backing TBAC’s gas flow claims. This adapter sounds dope for swapping calibers easily. Hyped for user feedback if the group buy hits 15+!
 
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