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Page AR-15 » Ammunition
AR Sponsor: bravocompany
Posted: 8/12/2023 10:37:35 AM EST
Is there any significant difference between PMC's "Bronze" and "X-TAC" iterations?
Link Posted: 8/12/2023 10:45:23 AM EST
[#1]
Assuming you mean both their 55gr loadings, and based on their descriptions, the X-Tac has a higher MV (3200 vs. 3270), and it would imply that the X-Tac is "duty" grade and has tighter quality control standards over the Bronze, which is their range/plinking line.

The bullets themselves have the same stated dimensions and ballistic coefficient, so they're probably the same.
Link Posted: 8/12/2023 10:52:24 AM EST
[#2]
Sounds good. Thanks for the clarification.
Link Posted: 8/12/2023 11:07:03 AM EST
[#3]
No, they are not the same and they both fail to meet the US mil-spec for M193.

...
Link Posted: 8/12/2023 11:24:36 AM EST
[#4]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
No, they are not the same and they both fail to meet the US mil-spec for M193.

...
View Quote


Muzzle velocity? Dimensional tolerances? Something else?
Link Posted: 8/12/2023 12:28:24 PM EST
[#5]
Bronze seemes to be more gassy shooting suppressed (at least IME). Not blast you in the face gas, but that shit that drifts up in between strings of fire. Not a big fan of it with the can. I dont notice that with X-tac. Haven't had any failures with either.
Link Posted: 8/12/2023 7:23:24 PM EST
[#6]
Bronze is .223 and X-Tac is 5.56
Link Posted: 8/12/2023 9:40:05 PM EST
[#7]
Link Posted: 8/13/2023 12:09:24 AM EST
[#8]
i chrono’d several variants of 5.56 a couple weeks back. x-tac was hands down one of the worst performers. to me it’s really nothing more than a plinking ammo. just to give you some info..

this is out of a 14.7” AR with a yhm t2 suppressor.

x-tac 55gr - 2875
igman 55gr 223 - 2890
imi 55gr - 2926
winchester white box 223 - 2992
ppu 55gr - 3035

imi 855 62gr - 2857

hornady frontier 75g - 2652
aac 75gr bthp - 2662

aac 77gr bthp - 2539
aac 77gr tmk - 2611

speed isn’t everything, but my groups opened way up with x-tac too. i’m not the best shooter, but it was quite noticeable of a difference.

you may see different results in your gun, but i haven’t heard great things from others regarding x-tac either.
Link Posted: 8/13/2023 1:23:02 AM EST
[#9]
IIRC X-tac is crimped/sealed primer and just annealed instead of polished.  In my guns X-Tac is hotter, but less consistently so.  Bronze has marginally more consistent (but lower) velocity, and slightly more accurate.
Link Posted: 8/13/2023 12:23:24 PM EST
[#10]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Bronze is .223 and X-Tac is 5.56
View Quote

X-TAC is not a 5.56 load.  Look at the data that bfoosh06 posted.



PMC Bronze 55 Grain FMJ


I evaluated the accuracy (technically, the precision) of the PMC Bronze 55 grain FMJ ammunition using my 20” stainless-steel Lothar-Walther barreled AR-15.  This barrel has a 223 Wylde chamber with a 1:8” twist.

Three 10-shot groups fired in a row from the bench at a distance of 100 yards had the following extreme spreads:

2.22”
1.82”
2.15”

for a 10-shot average extreme spread of 2.06”.  The 30-shot composite group had a mean radius of 0.72”.

Unfortunately, my cocker spaniel chewed-up my chronograph data for this load.







The smallest 10-shot group . . .



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Page AR-15 » Ammunition
AR Sponsor: bravocompany
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