I knew it was getting bad, but damn..

TonyTheTiger

TonyTheTiger

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Minuteman
Feb 14, 2017
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#1
The loosey goosey upper is an Anderson that has about 28k rounds on it, about 17k of those with a titanium carrier, 3k with an aluminum carrier and the rest with a steel JP low mass carrier. I knew the carrier seemed sloppy but I didn't realize how bad it was until my accuracy went to hell. It went from shooting my 69 SMK load around 1.5-2 moa down to .6-.8 just by swapping all the parts to a new upper.

The aluminum carrier cut through the anodizing really quick and made the inside of the upper kinda rough, and then the titanium carrier seems to have hogged it out from there.
 
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#3
The aluminum one I can't remember who made it, it was a cheap one that Rainier and a bunch of other companies put their name on. I just wanted to try it out and it completely failed at 3k rounds because the gas rings reamed it out.
The titanium was a Boomfab Titane, a flash in the pan company that made its debut in the good old days of 3GN. It's a quality piece but they couldn't stay afloat selling $550 BCG's.
I shoot with a ton of people that have used titanium and aluminum carriers and the high volume shooters all seem to experience unusual wear and enough finickiness that they go back to low mass steel carriers.
 
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#6
Was the titanium carrier coated?
TonyTheTiger said:
The aluminum one I can't remember who made it, it was a cheap one that Rainier and a bunch of other companies put their name on. I just wanted to try it out and it completely failed at 3k rounds because the gas rings reamed it out.
The titanium was a Boomfab Titane, a flash in the pan company that made its debut in the good old days of 3GN. It's a quality piece but they couldn't stay afloat selling $550 BCG's.
I shoot with a ton of people that have used titanium and aluminum carriers and the high volume shooters all seem to experience unusual wear and enough finickiness that they go back to low mass steel carriers.
Click to expand...
In machining Ti one thing is for sure and that is it does not like to be rubbed on.

Did a research job grinding Ti turbo shafts that were long and progressively smaller in diameter. A steady rest with rollers was not usable as the rollers had more run out than our part tolerance. We tried multiple steady rests with pads with different coatings to no avail. Hell even the ruby on a probe would get Ti build up after a while.

Not surprising in my mind that a Ti carrier would eat the AL.
 
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#8
bigjake83 said:
It's hard to beat a quality BCG with a smooth DLC coating.
Click to expand...
Agreed, DLC is the slickest stuff I've tried...................you can tell the difference just cycling the action by hand.

But I just go a titanium carrier from RCA & it seems equally slick; will see how it performs when it gets put together. Says the coating is a "proprietary aerospace nitrided coating", not sure if it's PVD or a version of DLC but it's really slick with a super fine finish.

MM
 
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#13
MontanaMan said:
But I just go a titanium carrier from RCA & it seems equally slick; will see how it performs when it gets put together. Says the coating is a "proprietary aerospace nitrided coating", not sure if it's PVD or a version of DLC but it's really slick with a super fine finish.

MM
Click to expand...
Just snagged one of these off a prize table and you're right, it's freaking smooth.
 
#16
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#19
TonyTheTiger said:
The aluminum one I can't remember who made it, it was a cheap one that Rainier and a bunch of other companies put their name on. I just wanted to try it out and it completely failed at 3k rounds because the gas rings reamed it out.
The titanium was a Boomfab Titane, a flash in the pan company that made its debut in the good old days of 3GN. It's a quality piece but they couldn't stay afloat selling $550 BCG's.
I shoot with a ton of people that have used titanium and aluminum carriers and the high volume shooters all seem to experience unusual wear and enough finickiness that they go back to low mass steel carriers.
Click to expand...
Aluminum carriers have always been consumable parts. Lifetime subject to maintenance, usage and gas pressure.

Compatibility and Usage

Non-ferrous specialty carriers should be considered consumable rather than lifetime parts. The JPBC-1 yields a performance advantage for competition applications at a price. Your usage and maintenance will determine the duty life of your carrier.

The JPBC-1 is a competition/race gun part only and is not recommended for any duty/defense use where absolute reliability is required.

This carrier should also be run with an adjustable gas system to minimize stress on the entire bolt carrier assembly.

This carrier is not recommended for use with gas systems shorter than mid-length for longest service life. Use with carbine or shorter gas systems may result in gas erosion in the tail stock area and subsequent leakage and reduced service life.

To help avoid the instance of slamfires, this bolt carrier comes packaged with a titanium firing pin. We strong encourage use of a titanium firing pin with this carrier to ensure safety.

Not for use in .308 AR-type rifles.
Click to expand...

JP Ultra LMOS™ Bolt Carrier
 
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#22
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