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Durkin Tactical Franklin Armory
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Posted: 8/20/2023 10:54:43 AM EST
What is the cleanest powder for 350 Legend?

Currently using lil’gun.
Link Posted: 8/20/2023 11:12:15 AM EST
10.5” barrel, adjustable gas block, Caliber 350 Legend
Rounds reloads: Lil’gun powder 147gn crn bullet,
24.5gn powder.

Gas block has 15 clicks. Currently on click 6. It is suppressed.

Issue is too much gas back into bolt carrier, carbon locking it. Happens after 40 rounds.

I order a 20% reduced spring. Any idea on which buffer weight would help. I need to reduce gas even more.
Hoping to get down to 3 clicks.

If anyone knows of cleaner powder for this
cartridge plz share.
View Quote

Define what you mean by your bolt carrier getting carbon locked after 40 rounds.  

If you shoot it a little, it starts to get dirty, and won't cycle -- You may need more gas, not less.
Link Posted: 8/20/2023 12:15:29 PM EST
Bolt won’t move inside of carrier. I have beat it out.
On inspection the bolt is dirty and will not move. After applying cleaner and scraping it clean, it moves freely again. I don’t have a pix currently.
Link Posted: 8/20/2023 12:23:41 PM EST
Link Posted: 8/20/2023 12:58:04 PM EST
Its was wet
Link Posted: 8/20/2023 3:23:59 PM EST
I'm not a 350 legend guy.  But IMO if any rifle is locking up after only 40 rounds, something else is going on.  Even the dirtiest import junk ammo I've ever used hasn't caused any of my rifles to carbon lock after 40 rounds.  If the tolerances are that tight, I would be changing out the BCG.  Something is out of spec.
Link Posted: 8/20/2023 8:14:39 PM EST
Need more info. Something is wrong. I don't know shit about .350  legend  but I've dumped a ton through ARs suppressed. A little lube and they just run. 1,000s of rounds without cleaning is normal.
40 rounds? You have other issues
Link Posted: 8/20/2023 10:17:43 PM EST
Issue is too much gas back into bolt carrier, carbon locking it. Happens after 40 rounds.
View Quote

Something is out of spec.  BCA?
Link Posted: 9/6/2023 8:50:18 PM EST
I roll hornady 170 SP with 22.5 grains of lil gun and have shot well more than 100 rounds in a day. No issues at all. Green mountain barrel, BCM BCG and BCM upper receiver. I run a 16 inch barrel and a 12.5

10.5 seems awful short for a 350 legend with that much powder in an AR. Who makes that  barrel? What length gas system? Pistol? Carbine?

Link Posted: 9/7/2023 4:23:15 AM EST
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