r/300BLK

what are you folks finding is the best compromise bullet weight for 300 supers? am loading 130g HP over 19.3g of A1680 now, but hoping to move up to a heavier bullet without too much drop.

We were recently featured in a Whiskey & Windage podcast and I wanted to give the entire r/300BLK subreddit a MASSIVE thank you for the continued support throughout the years.

If you guys have ever wondered how or why we tackle things the way we do and how we got started with 300blk, definitely check out the podcast!

THANK YOU

I have an ancient YHM .30 Phantom suppressor just sitting in my safe. I decided I needed something to do w/ it, so I ordered a Faxon 6" 1:5 Gunner barrel and a Midwest 12.625" rail to tuck it under. While I wait on everything to get delivered (hopefully tomorrow), I was trying to research the best way to tune it. Understanding that ammo plays a part in how it will run, and I will be running it almost exclusively w/ subs, I was hoping I could pulse the community of people that currently have this sort of set up to see what buffer weight and spring you all are running? I won't be running an AGB, so the buffer & spring will be the main way I can make sure this thing will run reliably and lock back. I also plan on using a forward assist vent from Weapon Outfitters as well as a Raptor SD for the CH as the Phantom is an old school gassy little bitch. Any advice or suggestions would be welcome. TIA.

I was looking to swap one of my 556 uppers over to a 300 blackout and I am now stuck between these two barrels. Criterion was my first choice, but then I ran across the Phased Array system. I have found very little information on the Geissele system.

Have any of y’all have tried this barrel before? Thoughts on it compared to the Criterion?

Thinking of finally spending the money to get one of my dream guns…. BUT what trigger would you purchase if you got the suppressed variant. The standard or the GEISSELE SSA-E?

TLDR, basically the title, phantom defense subs seem to be getting dirtier and now I have a carbon ring starting to form?

Took my rifle out this morning and shot a mix of 200gr and 220gr phantom defense subs. Had this gun set up with an H2 and carbine spring and hadn't had any issues with this setup until today.

Today started with the 200gr as I had 2 bags left and just recieved 800 220gr subs as those seemed to run better for me in the past. First mag no hold open. Tried 220s and seemed fine, okay maybe it's the 200gr. Shot some more 200gr and held open some and others didn't. From there started having a bunch of failure to feeds and had to mortar it to get a stuck round out.

Swapped back to 220s and cycled fine but had some issues holding open on a few mags. Groups seemed to be opening up and called it a day. I'm no precision shooter, but was worried of a potential baffle strike. Cap and baffles looked good I just suck lol.

Got home and started to clean it. It's the dirtiest this gun has gotten and only in about 100 rounds this morning. Explains the jams and issues I was experiencing. Looked down the barrel and saw a ring building up at the chamber just before the rifling. From what I have read this can lead to poor cycling, accuracy, and more. Bore snake didn't seem to make a dent in this so time to get a cleaning rod and go at it.

Just wanted to see if others have noticed this with the phantom subs recently? While frustrating at least I know my rifle needs some adjustment to ensure reliable cycling (trying an H1 buffer next time).

Also what diameter cleaning rod are you all using? I am only seeing 6mm options. I have a 5mm for my 556 and 22s but want to get the proper size for this.

So I’ve brought it down between these 3. It’ll be primarily for a 300blk out build with an AGB and sometimes a .308 bolt gun. My LGS has the Blind Tiger in stock so I’m leaning towards it, but not 100% yet. Any thoughts on which to go with?

8.5in barrel, pistol length gas system. Just wanted to know what buffer system would work, friend said JP captured H2 system would be fine. Don’t have an adjustable gas block but am willing to get one if required