I just began reloading this weekend. My AR pistol build for the upper is a V-LTOR upper, V-LTOR CAS-V rail, Criterion 10.5" 1:7 twist 300BO barrel with pistol length gas system, V-LTOR gas block, BCM stainless gas tube, Radian bolt, Rein 3.0 light, Aimpoint PRO.

The lower is a Radian ADAC, Geiselle braided h1 buffer system and tube, Geiselle SSA-E, Radian Raptor charging handle, A2 grip, and SBA4 brace.

This build has run every factory ammo I've put in it perfectly with standard 5.56 magazines mainly Colt USGI 20rd mags. All the ammo I loaded was using new starling 300BO brass. My subsonics were Berry's Bullets 220gr spire points over both 9 and 10 grains of H110 with CCI small rifle primers. The COAL was 2.230. 30 of these, 15 of each landing ran great suppressed and unsuppressed aside from one ftf which I can live with for the time being and most likely has to do with it being in the first 10 I fired unseppressed (I didn't anticipate it cycling at all unsupressed). My second loading was hornady 110gr V-Max over 20gr of H110 with a CCI #400 small rifle primer. These were seated to a COAL of 2.050, I fired 35 of these 5 rounds in a mag at a time and they all had atleast one jam per mag where the case failed to feed and munched the brass in the process causing a jam as well as likely permanent damage to the brass. Has anyone experienced anything similar to this or have much more reloading knowledge than myself who could potentially diagnose my issue? The supersonic loading I used was towards the upper limit but was loaded within hornady spec per their reloading manual. The majority of jams tended to happen on the last round of the mag which makes me think the magazine might have been a problem however it runs factory ammo fine. Any help/ advice is appreciated thank you.

I've seen discussion regarding potential early frag in 8 and 9" barrels, but haven't specifically seen issues with the shorter 6.75".

I intend to mostly run supers out of this PDW, so if I need to switch from the cheap AAC 110gr to a more expense solid copper round, that would be nice to know.

What suppressor is everyone running on their blackout?

Hey guys found this off the gun wiki was wondering if could get some advice on weather or not this is a good deal. Would like to just have a blank canvas i can use to learn, take apart and put back together etc. I watched TREX arms on youtube and he put this gun through a pretty solid test not sure if it was this exact model but PSA non the less. Any advice would help ✌🏽

https://palmettostatearmory.com/psa-7-5-pistol-length-300aac-1-8-phosphate-6-lightweight-m-lok-moe-ept-sba3-pistol-5165449201.html

New to hog hunting here and decided to bring my honey badger .300blk as a secondary for shits and giggles. What ammo do you guys use or prefer with this gun? Very simple setup with a Q Trash Panda & thermal clip on. Taking shots anywhere from 50-100 yards.

What parts should I be looking at to build something most similar to this picture?

Looking for some suggestions on suppressors. I have a 10.5" barrel and I would like to keep it as short as possible with the best performance.

going to the gun show. Have seen prices of 900-1200 for 300 blk

I was wondering if anyone had any feedback regarding this spring if used in your .300 build. I’m trying to build a lower that can be interchanged for a SBR 5.56 upper and even possibly a SBR 458 Socom upper as well. On their website they caution using it for subsonic .300 as it may be too strong to cycle properly. Just curious if anyone has used it for that purpose and if you had any feedback or insight on that.

What do you guys think of my new 12.5 bcm

I’m running a complete griffin 9.5 build that I love. First day I got it, went to the range and shot 60 Stelth subs and 60 subs from my local spot Ventura munitions - zero issues. I got some fiocchi 220gr in bulk and took it out the other day. Short stroke every round. Tried two different lbp cans and it wouldn’t cycle. The fps is the same as the others, so not sure what the issue could be. I did change to a different mag - this time I was using a lancer .300 mag. Could that be it? I foolishly didn’t pack my standard p mag, but going to try and go again Tuesday. Would hate to need to sell all this ammo…

I kinda just now realized the mag could be the issue but not sure if that even makes sense. Griffin is non adjustable and that same can worked 2 weeks ago with various ammo

I purchased an 8in Kak upper with 1/5 twist 5R rifling. Primarily for subsonic suppressed shooting. I wouldn’t mind shooting supers as well though. I know twist rates can affect separation and ballistics alike. I’ve reached out to Lehigh and all theirs are rated for it. Anyone have any specific ammo that you’ve experienced were an issue with 1/5 twist at that length?

What HD round y’all running on very short barrels?

I’m working up some loads for a Rem 700 AAC-SD.

This thing has been fighting me. I’ve been using 220gr Everglades plated, 190gr Sub-X, 208gr Amax, 178gr ELDX, 212gr ELDX, and factory loads and all produce the same issue.

Example, the 220gr Everglades. My first test load was 10.9gr IMR4198. Had an average of 795FPS with an ES of 116 and the accuracy was horrible. 5 shots FPS was 723.3, 796, 804.5, 839.8, 814.3.

Another example, 212gr ELDX. 1059 fps average ES of 133. 971.7, 1071, 1105, 1066.3, 1082.2 and accuracy was OK except for the first shot going left.

I’m starting to think the 5r rifling is the cause of the first round low FPS and POI shift. After the first round, all the shots group ok.

I want to make these Everglades plated bullets work out, since I have about 150 left, but as of right now I’m not too hopeful. I loaded up 3 different loads for testing tomorrow. Adjusted OAL to 2.09” since the profile looks a lot like Sub-X bullets without the boat tail and also to the first canalure. First charge is 10.9gr of IMR4198, 12.2gr of A1680, and 8.2gr of N110.

I’ve read of people getting good results with N110 except not always cycling an action, with isn’t a problem with a bolt action. I’ll report back tomorrow

Anyone have any data that may help with these Everglades 220’s?

I have Accurate #2, 9, and 7, A1680, CFE Pistol, CFE BLK, Clay’s Universal, H110, H335, H4350, H1000, Longshot, VV N340, N350, N110, N140, N133, and Reloader 7 currently.

Hello, I got a Ruger AR 556 .300 blackout and does anyone know if the magazines from the factory are garbage, or if jamming is an actual issue for the gun? It jammed probably 20 times in one magazine. All 4 of the ones I have jammed like that.

I am curious what y’all would recommend for a 9” SBR specifically meant for subsonic 300BLK w/ suppressor.

If going the build route (AR-15) I imagine I wouldn’t be able to have a folding stock (which Isn’t a big deal for me). I’m just curious whether I could build something with a complete upper that would be as reliable for subs as the MCX spear is.

Not too long ago, I got my first 300blk rifle. Being new, I went to Bimart and got the Ammo Inc 300blk stealth ammo, the cheapest there. A buddy and I went down to his property and started sighting it in and getting it set up for hunting.

well we started fucking around and started shooting farther and farther, ended up getting to 300 yards out, and damn this ammo is good, able to hit a 12x12 gong at 300 yards constantly, shot after shot, not sure the grouping as the paper was already shredded to bits but judging by the marks it was probably a 4 inch grouping

next I'm off to try their vmax 110 grain ammo

SiCo Omega 300 on my 9" custom built 300 blk. Xmas came early this year, boys!

Anyone tried this stuff? Target Sports is pretty widely accepted as a solid company so it’s surprising that there isn’t much info about this in house “Apex” ammo brand online in general, much less these 194gr 300 blk. Can anyone vouch for Apex or these rounds?

Got a second honey badger and don’t want to SBR this one. Came with just the buffer tube cap, wondering if anyone had a brace laying around that needs a new home.

Just got the eotech and love the large window, have the g43 magnifier ordered and am considering a riser solution for less cheekiness. Leap is 250 but doesn’t require a new mount for the magnifier, unit is cheaper at 100~ but requires a more expensive magnifier mount.

Opinions?

Ignoring price and scarcity concerns… is this round superior to 556? Does 556 still have ballistic advantages?