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re: Garand Thumb stress tested a PSA Freedom Rifle and the barrel finally died at 6k rounds...

Posted on 3/4/24 at 8:08 am to
Posted by CarRamrod
Spurbury, VT
Member since Dec 2006
57526 posts
Posted on 3/4/24 at 8:08 am to
quote:

YouTubes

lots of info in this one and i might've gotten some of it wrong, but:


barrel groupings lost milspec MOA just over 6k rounds.
bolt extractor began to wear out around 5k rounds.

a full-auto was used to expedite the round count, but not in the form of a "burn-down" that most Gun Tubers do. towards the end of the video, GT mentions that it was 3 mags and cooled. you can see his pants change throughout the video so it was done over the course of a few days.

stock gas tube and gas block survived the test, but the tube was worn.

they had a guy from BEXAR ARMs come out and run spec tests on the BCG and barrel after the test.

- BCG was surprising still within spec although the top rails were worn significantly as it rode only the top of the receiver.
- barrel chamber had some serious machining marks.
- gas port was a bit worn mainly due to full-auto



"i would suggest this rifle for someone that isn't serious about shooting. If you want a duty grade weapon at the lowest price point, I suggest BCM. "


i wasn't expecting that response.
was any maintainence done between cool downs.... if not, who lets their rifle continue to fire without any lube.
Posted by X123F45
Member since Apr 2015
27595 posts
Posted on 3/4/24 at 10:29 am to
quote:

if not, who lets their rifle continue to fire without any lube.


Too many people.

I have a new tungsten disulfide powder i mix in to my moly grease. Apply a light coating and then cycle the weapon... A lot.

The powder isn't easily removed (understatement, it's impossible). A few applications in and I run a few guns basically dry.
Posted by Jack Ruby
Member since Apr 2014
23011 posts
Posted on 3/4/24 at 2:52 pm to
quote:

was any maintainence done between cool downs.... if not, who lets their rifle continue to fire without any lube.


The edits are deceiving. They said they basically ran 3 mags, then cooled to ambient temp (30-40 degrees F) then tested and continued firing again. They also did lube a little bit every couple thousand rounds.

I think their main criticism of the barrel was that they expect combat grade hard chrome-lined barrels from FN, Colt, etc to go around 12-15K before they started to lose their accuracy that badly.
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