I'm TDY for the next four months in AL and my reloading bizz is in KS. I am looking to kill some pigs/deer down here on the weekends and harvest some once fired brass to use later. Anyone who recently picked up a 12" 300 get a chance to shoot some factory ammo yet? Granted, anything will be accurate enough to smack a pig at 100, but like some I have an accuracy addiction. If no one has a factory load they like I'll just buy a couple hundred rounds of 110 vmax Hornady black and give it a go. Thanks!

Black Hills Whisper 125 gr supersonic or Barnes Vortex Tac Tx 110 gr are both hog slayers.  Barnes is more readily available.

...

I'm pretty interested in this too

I caught a deal on Hornady zombie max and have been very happy with accuracy shooting it. Haven't hunted with it yet, but plan to this fall.

either grain of these...

300 BO Ammo

I decided to buy a bunch of random 300 BO ammo. I have the following headed my way and will have an accuracy synopsis in a week or two. It won't be the most accurate as I'll be using a 1-8 since all my glass is 1000 miles away for the next few months.

Hornady black 110 vmax
Barnes 110 black tipped vortx
Nosler trophy grade 125 gr
Hornady 110 GMX full boar
Sig ELite performance 125 OTM
HSM pro hunter 125 spitzer

I'm curious how 220 Gr Subs will do???

Keep us informed, I'm curious as well.

Update -

Still waiting on a shipping notice from able Ammo, going on 8 days now....so in the mean time I ordered a Labradar and an Atlas PRS QD. If only I had my Meopta S2 82 20-70 with phone scope down here, then I could do a proper video review. I'm bag less down here as well so I guess I'll make a shooting bag by cutting up an old flight suit and filling it with some rice and Pinto beans.....since all my PRS gear is in MO. I hate being 12 hours away from my kit but I'll do my best to make it as accurate as possible. Really wish I had some of my better glass with me, a 1 MOA dot reticle is monsterous in comparison to a G2 or SKMR reticle. 8x power vs 24-30 kind of blows too.

In a couple of months from now when I'm done learning to fly this giant phallus called the Apache, I'll do a hand load review as well. I ordered a bunch of lapua brass the other day. Which ever factory load does the best will dictate what projectile I use. Enough rambling for one night.

I took my 16", 300 blk upper to the range today for the first time.  I only had a couple of boxes of Remington UMC 120gr and a couple of boxes of Hornady Black 110gr.  
I had much better groupings with the Remington that with the Hornady.  The Hornady was all over the place, even had one FTF.  
While I consider myself too much of an amateur to know for sure, it had a feel as if it were trying to short stroke and not properly cycle.  I am basing that upon the bolt not being held open after the last shot (I loaded 5 shots per magazine).

Anxiously awaiting more ammo so I can take it for a proper test drive.

So I ordered 6 boxes from a company I won't name, Able Ammo.....I ordered on 28 August and so far I have 1 box of Hornady  black 110 gr. Worst gun type purchase ever! Still waiting, in the mean time I ordered an Atlas PSR with quick detach and a LabRadar since my magneto chrono is in KS and wanted one anyway. The other items have already started collecting dust....once the Ammo gets here I'll do a proper review with chrono data.

Got good results with a load that HSM used to produce with Hornady 110 grain AMAX out of a 12.5" rifle. It looks like Hornady produces a similar round now in the Hornady Black label. I have not tried the Hornady Black yet.

I've got a box of the hornady black and a box of sig sauer 220 gr.  I cancelled my order through able after some more incompetence and am placing an order now for the rest. Range review Saturday if all goes to plan.

Barnes 110 FB
Barnes 120 BT
Nosler. 125 tipped
Horn.    110 GMX
Horn.    110 Vmax black
Sig        220 SMK
Sig.       125 SMK

On the way

mine loves the Gemtech ammo. their website only lists 187 gr subs right now but if you look around you can find a dealer who still have the supers and the subs in stock of their older stuff.

i have tons of it i bought a few years ago when they had a LEO discount code worth 45% off and it worked on ammo. i bought all i could afford at the time.

No issues with S&B 200gr subs. Didn't really shoot for accuracy and don't care to.

11 bucks a box is cheapest I found

Took it to the range today with the the intent of shooting 7 different types of ammo and bringing back accuracy and chrono data. Something is jacked and I don't have the necessary equipment to limit variables. I'm shooting a 12" upper with a 1-8 vortex strike eagle in an LT104 with a Maxim CQB brace. I don't have my torque wrench, so it's possible the mount is too tight or loose. I can't snag one of my S&B's or Khales' in a spuhr and rule the optics out, I also can't slap a SBR lower on it and see if it's the brace. However, I doubt it's the brace as I borrowed a sled from the guy next to me just to see if that was it, same results. I stopped at 4 types of ammo in an effort to limit Ammo expenditure and deminidhing returns on my time investment. I will continue this test in Missouri or kansas when I'm out of Rucker. Right now I'm chalking it up to something being Fuuky

These were going to be 5 shot groups with an additional 5 for chrono data, as it sits they are 3 shot groups

110 Barnes Tac TX FB             MV Avg 2262 ES 38 SD 19.1 GROUP over 3"

120 Barnes Tac TX BT            MV avg 2016 ES 20 SD 11.1 GROUP  over 3"

110 Hornady Vmax Black        MV avg 2342 ES 43 SD 16.6 GROUP  1.86" (chrono data of 7 rds) VERY HOT LOAD! You can cut your finger on the extractor marks.

125 Nosler BT                         MV avg 2092 ES 25 SD 13.2 GROUP 3.01"

Before someone jumps on here and blames the shooter, I assure you I'm an accomplished shooter and place very well when I compete in PRS and PRS type events. I took second in my last outing with over 80 shooters. I'm not blaming the gun either so don't go full retard with replies. I'll sort it out in about 7 weeks when I'm done with this last TDY trip. What a crappy day, people say a bad day at the range or playing golf is better than a good day at work, I call BS!

Not really answering your question but, I tried a few different brands of factory ammo...  mine is super overgassed and was denting my brass and leaving brass shavings inside the chamber.