New 12.5 chrono data:
Barnes 70gr TSX 5.56: 2675 fps(!)
Creedmoor Sports 75gr HPBT 5.56: 2502 fps
The Barnes load is damn impressive. It clocked 2875 in my 16" Sionics. Wish I had bought more! Cant wait to try it on hogs and deer
New 12.5 chrono data:
Barnes 70gr TSX 5.56: 2675 fps(!)
Creedmoor Sports 75gr HPBT 5.56: 2502 fps
The Barnes load is damn impressive. It clocked 2875 in my 16" Sionics. Wish I had bought more! Cant wait to try it on hogs and deer
Some other numbers to compare:
In a BA Hanson 12.3, I get about 2725fps with that 70tsx load at 70F, suppressed.
Eagle 19 on TOS with a BCM standard posted 2656fps with 70tsx, 2830fps XM193, 2864 Wolf Gold, 2581 IMI 77, 2391 with GD 75, all suppressed. Chrome lined barrels always seem a little slower, in my limited experience.
As a real wildcard, Rifleshooter got 2919 fps with 12 and 2974 fps with 13 with XM193. This was a bolt gun, so we cant extrapolate much. I just thought it interesting.
tl;dr
Your BRT seems to be in the normal velocity range for 12.5 barrels. These are, of course, different barrels, different days/conditions, and different ammo lots.
MQ105, you and I have arrived remarkably close in what a 11.5 suppressed gun should look like.
Clint,
Looking back at your website at the CL barrels, these seem to be marketed for mixed suppressed use. If I bought your 14.5 CL CHF (why is 14.7 so rare?!?) ..... how close in gas drive would that be to one of your port inserts in a similar (or same) 14.5 middy with A5H0, Colt spring, 50/50 suppressed, 7.62 can, brass .223 and 5.56?
In other words, if I intend to use the CL 14.5 barrel 50/50 with a can, should I also buy an EZtune or, just run it as is?
RLTW
Whats New button, but without GD: https://www.m4carbine.net/search.php...new&exclude=60 , courtesy of ST911.
Disclosure: I am affiliated PRN with a tactical training center, but I speak only for myself. I have no idea what we sell, other than CLP and training. I receive no income from sale of hard goods.
Black River Tactical
BRT OPTIMUM Hammer Forged Chrome Lined Barrels - 11.5", 12.5", 14.5", 16"
BRT EZTUNE Preset Gas Tubes - PISTOL, CAR, MID, RIFLE
BRT Bolt Carrier Groups M4A1, M16 CHROME
BRT Covert Comps 5.56, 6X, 7.62
FYI,. My chrono data is unsuppressed, 50-55 degrees F, 900 ft ASL
That TSX load is something else though. Smoking fast from these short barrels. Haven't had a chance to try it on game yet but I expect good results.
ETA: and yes, agreed, my velocity seems to be typical of other 12.5 barrels. I'm pretty happy with the overall package. Short enough to be handy with a can but enough velocity to reach out if needed.
Last edited by littlejerry; 12-26-20 at 18:18.
RLTW
Whats New button, but without GD: https://www.m4carbine.net/search.php...new&exclude=60 , courtesy of ST911.
Disclosure: I am affiliated PRN with a tactical training center, but I speak only for myself. I have no idea what we sell, other than CLP and training. I receive no income from sale of hard goods.
Clint, will you be doing another run of 16 LPR barrels, whether chrome-lined or melonite, or any ss recce barrels in the same length?
Black River Tactical
BRT OPTIMUM Hammer Forged Chrome Lined Barrels - 11.5", 12.5", 14.5", 16"
BRT EZTUNE Preset Gas Tubes - PISTOL, CAR, MID, RIFLE
BRT Bolt Carrier Groups M4A1, M16 CHROME
BRT Covert Comps 5.56, 6X, 7.62
Thanks to some government $$$$. , I just ordered one of your 11.5" CL CHF Optimum barrels and one of your BCG's. I can't believe BRT has any pre-order barrels or BCG left, as quality top tier components are getting harder to find.
Last edited by Biggy; 01-07-21 at 21:17.
Black River Tactical
BRT OPTIMUM Hammer Forged Chrome Lined Barrels - 11.5", 12.5", 14.5", 16"
BRT EZTUNE Preset Gas Tubes - PISTOL, CAR, MID, RIFLE
BRT Bolt Carrier Groups M4A1, M16 CHROME
BRT Covert Comps 5.56, 6X, 7.62
We're down to a handful of 11.5" barrels left.
If you want one, now is the time.
Black River Tactical
BRT OPTIMUM Hammer Forged Chrome Lined Barrels - 11.5", 12.5", 14.5", 16"
BRT EZTUNE Preset Gas Tubes - PISTOL, CAR, MID, RIFLE
BRT Bolt Carrier Groups M4A1, M16 CHROME
BRT Covert Comps 5.56, 6X, 7.62
Bookmarks