Have you noticed changes on Barnes' web site?

1899

1899

CGN Ultra frequent flyer
Rating - 100%
34   0   0
Location
West
I was looking at Barnes' web site because I was thinking of giving the new 150gr TSX BT a try in my 7mm RM. I recalled that it, and the new .308 165gr TSX BT had very good ballistic coefficients. Lo and behold, there seems to be a change on their web site. Here are some BC's

.284"
140gr TSX BT - .477
150gr TSX BT - .408 :confused:
160gr TSX FB - .508
175gr TSX BT - .417 :confused:

in the Barnes reloading #1 the 150gr X FB is .488 and the 175gr X FB is .530, in fact, the regular flat base 175gr is still listed with that BC on their web site.

.308"
165gr TSX BT - .380
165gr XLC BT - .457
165gr X FB - .456 - in reloading manual #1

Does anyone know why the sudden changes? I am certain they had the .284" 150gr listed at .50X and the .308" 165gr TSX BT was listed at .5XX

I know nothing beats testing to determine where your bullet goes, but some of these numbers seem counter-intuitive. Sure the TSX has bands, but I sure wouldn't have guessed a massive decrease in BC from the regular 175gr to the boat-tail 175gr TSX. Could this be a marketing ploy to help sell the new MRX? I mean, they will have much improved ballistics, or so Barnes might claim.
 
Really Frank? I didn't get the email, but thanks for the heads up. I wonder if the rest of their BC's (the ones that haven't been changed) are wrong too.
 
They said they did testing with the better technology available today. Nosler did the same thing. Virtually all BC's are now lower than previously stated. If you shot the barnes TSX's otu past 300 yards the BC's didn't work anyway.
There was a recent article in Shooting Times i think where Rick Jamison caclulated the actual BC's of 30 cal bullets in flight over Ohler equipment and compared them to factory stats, Barnes had the bigest overstatement by far.
The point of the article was it is a really slippery science to state the BC of a particular bullet, apparently they change in flight, altitude and velocity.
 
A few years back Sierra changed their advertised BC's as well. The BC's are only relevant to where the bullets are tested, and although they don't tell you this, you should not assume a specific trajectory at a given velocity, at your location, without shooting to confirm it. Over the last 50 years published BC's have been used as an advertising tool, and I'm surprised there would be a court challenge to what has been the industry's SOP for so long.
 
I always got a kick out of Hornadys 7mm 139 SST which is .001 higher than Nosler's 140 gr. Ballistic Tip :D

.485 vs .486 :rolleyes:
​
 
I don't really concern myself over the actual ballistic co-efficient that the manufacturer lists.I just shoot the bullet out to 500 yards and observe the actual trajectory for myself.
 
Levi Garrett said:
.308 165 gr xlc bt .505 bc
.308 168gr xlc bt .476 bc:confused:
Click to expand...


I believe they modified the 168 gr. XBT to match the profile of many popular match bullets. The 168 XLC-BT has/had the same BC as the 168 TSX
 
stubblejumper said:
I don't really concern myself over the actual ballistic co-efficient that the manufacturer lists.I just shoot the bullet out to 500 yards and observe the actual trajectory for myself.
Click to expand...

The point isn't really the trajectory, but the remaing velocity to ensure proper expansion. IIRC the Barnes X needs ~2000fps or so for reliable expansion. For example with a .308 Win using the 165gr XLC will maintain that velocity for about 75 yards further than the 165gr TSX.

I guess I should but out the old wet newsprint at longer ranges and see what happens.
 
The point isn't really the trajectory, but the remaing velocity to ensure proper expansion. IIRC the Barnes X needs ~2000fps or so for reliable expansion. For example with a .308 Win using the 165gr XLC will maintain that velocity for about 75 yards further than the 165gr TSX.
Click to expand...

If I was using a cartridge at it's limits for a given bullet,I would be a little more concerned.However when launching the 180gr tsx out of my 300ultramags at 3380fps,I have will still have more than enough velocity remaining at 500 yards even if the B.C. was out a bit.
 
stubblejumper said:
However when launching the 180gr tsx out of my 300ultramags at 3380fps,I have will still have more than enough velocity remaining at 500 yards even if the B.C. was out a bit.
Click to expand...

True enough.
 
You must log in or register to reply here.
Back
Top Bottom