I'm testing all of my 300BLK rifles with my collection of supersonic ammo to see how accurate they are. Last range report I tested my Sig MCX + CAT RAT Flow. This time, I'm testing my Radian Model 1 in 300BLK + CAT ODB.

The rifle:

• Radian Model 1 9" 300BLK upper on a milspec lower
• CAT ODB Inconel Hub
• AI Nano muzzle device
• CAT TSF-X Hub Adapter

Additional setup used for bench testing

• Leupold MK5 HD 3.6–18x scope
• Shooting bags:
  • Caldwell Deadshot front shooting bag
  • Armagedon Gear X-Wing Large Enhanced Rear Shooting Bag
• Garmin Xero C1 Pro chronograph
• MantisX X10 Elite to record firearm movement during each shot

I tested 7 different supersonic 300BLK ammunition. For each one, I shot two 10-shot groups at 50 yards. The table below is a summary of the results:

The mean radius column and the extreme spread is the average of the two 10-shot groups for each ammo. The rest of the columns are simply based on all 20 shots. I list mean radius first since I think it does a better job than extreme spread of summarizing precision. Extreme spread is decided by only two shots, and is more noisy. Same exact principle applies to the standard deviation and extreme spread of muzzle velocity.

Overall, I was relatively impressed with the precision of the Radian Model 1. One of the Black Hills TMK 10-shot groups was 1.1 MOA. The other group was also close to being a ~1 MOA group, but shot #1 was a flier, making that 10-shot group 2 MOA. Looking at the MantisX and the Garmin data, nothing was off, so it appears to be a valid shot. Regardless, very good performance overall.

Phantom Defense "Spicy Boi" 85 grain was disappointing. With a mean radius of 1.22 MOA, it had lower overall precision than my bulk ammo, Magtech 123gr. It performed on the low end in my Sig MCX precision test as well. Due to its low ballistic coefficient, Phantom Defense 85gr is geared for closer engagements, so its lack of precision is perhaps less important.

Phantom Defense TAC-TX 110gr performed very well. Great accuracy and high muzzle velocity and energy. And this bullet is a known strong performer. This is definitely the ammo I will use as a defense load for this rifle + suppressor.

Sig rattler LT SBR

Holosun 510c

YHM resonator R2

Midwest industries 10 inch handguard

Sig folding stock

SIG P211 GTO with holosun 507c

I know this has been discussed quite a bit, but can’t seem to get clarity on this particular situation…
Trying to help my dad find a can for his Geissele SD 8” 300 w/ phased array, but i have very little suppressor experience (non friendly state). It’s a full Geissele build. He said it came with an H1 buffer. Wants to shoot subs 90% of the time, and wants a balance between sound mitigation and not too much gas blowback. Should he be looking at low, medium or high back pressure cans with this system? It came with the Hux flash hider, making me think it was designed for a HUX flow through, but I know those aren’t great for sound. Does that phased array give you lots of optionality, or should he be looking firmly one direction or another on the back pressure? I’ve watched like 20 hours of suppressor vids on YouTube but none tested on this system. Any help appreciated!

I've had this stripped funny PSA lower and 7.5 Faxon bbl floating around in my parts box for a while now. Also came across a sig 1x6 lpvo a while back that I really never had any plans for either. The light bulb recently hit me, why not utilize some of these things in a bolt action AR upper build? So here she is. Nothing too special.

REX MG7 suppressor.

KVP Plan B adapter and muzzle brake.

FAXON 7.5 bbl

No name Mlok 7inch rail

Magpul AFG

BCA builders bolt gun kit for 5.56/.300blk

SIG Tango MSR 1x6 lpvo

Palmetto funny lower (Joe Biden special)

Milspec parts kit

Armalite branded A1 grip in OD Green

Matching OD Green B5 Car15 stock

What’s is everybody using for a supersonic deer hunting projectile. I feel like the obvious answer is the Barnes TAC-TX line of bullets but as far as lead based what are people using? Seems like 110 v-max, 125 SST, 125 nosler ballistic tip are pretty common?

Specifics of the rifle is a CVA scout with 16 inch barrel shots out to 200 yards.

Thanks for any input!