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Southwest Ammo .308

D

doubled

Sergeant
Full Member
Minuteman
Apr 2, 2011
513
2
50
North Texas
#1
Just in case anyone is interested, here are the speeds of 12 shots fires thru a 700 AAC-SD 20" 1:10 Barrel.

About 80 degrees F outside

Southwest .308 175SMK Winchester Brass

2519
2560
2545
2530
2552
2556
2574
2528
2548
2597
2568
2599
 
#3
Re: Southwest Ammo .308

Those are pretty different results. One has SD of 25 (bad), the other has SD of 7.9 (great).

I get 18 fps with FGMM, but that is with 30 shots, not 10. For 10 shots, it is more like 16 fps.
 
#4
Re: Southwest Ammo .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Carter Mayfield</div><div class="ubbcode-body">Those are pretty different results. One has SD of 25 (bad), the other has SD of 7.9 (great).

I get 18 fps with FGMM, but that is with 30 shots, not 10. For 10 shots, it is more like 16 fps. </div></div>

I have been shooting this ammo for some time now and have been through a ton of it.

I can say that I have NEVER seen results as the OP posted. SW ammo has been extremely consistent.
 
#5
Re: Southwest Ammo .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: doubled</div><div class="ubbcode-body">Just in case anyone is interested, here are the speeds of 12 shots fires thru a 700 AAC-SD 20" 1:10 Barrel.

About 80 degrees F outside

Southwest .308 175SMK Winchester Brass

2519
2560
2545
2530
2552
2556
2574
2528
2548
2597
2568
2599
</div></div>

What chrono did you use?
 
#7
Re: Southwest Ammo .308

Thats very odd to me. You are getting anywhere from 60-120 fps numbers off of 2 inchs of barrel.

Probably should have done a comparison between the 2 lots with the same rifle, but thanks for posting.

Another thing to think about is quality of barrel effect the fps on the same lenght of barrel, ie 20" factory barrel vs. 20" aftermarket barrel?
 
#8
Re: Southwest Ammo .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: k9222</div><div class="ubbcode-body">Thats very odd to me. You are getting anywhere from 60-120 fps numbers off of 2 inchs of barrel.

Probably should have done a comparison between the 2 lots with the same rifle, but thanks for posting.

Another thing to think about is quality of barrel effect the fps on the same lenght of barrel, ie 20" factory barrel vs. 20" aftermarket barrel?
</div></div>

Seeing a factory barrel shoot slower than a custom is almost a normal occurrence.

I did do a test of the 2 lots with the same rifle. The first 5 shots were with 1 lot, the last 5 with another. You can see that it stayed very consistent.

Ive tested SW ammo numerous times, this was not a full blown eval. I was just adding my chrono numbers to the mix to show a much tighter ES & SD compared to what the OP posted.
 
#9
Re: Southwest Ammo .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: k9222</div><div class="ubbcode-body">
Probably should have done a comparison between the 2 lots with the same rifle, but thanks for posting.
</div></div>

...and same chrono.
 
#10
Re: Southwest Ammo .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Charlie Pappa</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: k9222</div><div class="ubbcode-body">
Probably should have done a comparison between the 2 lots with the same rifle, but thanks for posting.
</div></div>

...and same chrono. </div></div>

What am I missing here? I did this.
 
#11
Re: Southwest Ammo .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: doubled</div><div class="ubbcode-body">it was a Chrony Master Beta. Bought it yesterday and today was the first day out with it. </div></div>

Well there you have it!

Shooting Chrony's are the LEAST reliable source of chrono information on a load.

My experience mirrors KNIGHT11B4's- 16-20 SD's when shot over CED and when I'm lucky, our local Sheriff's Office's Oehler

Southwest's 308 is about some good shit.
 
#12
Re: Southwest Ammo .308

Nice. I left them three voicemails trying to buy some ammo from them. Ended up going with factory federal SMKs. Maybe next time
smirk.gif
 
#13
Re: Southwest Ammo .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sobrbiker883</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: doubled</div><div class="ubbcode-body">it was a Chrony Master Beta. Bought it yesterday and today was the first day out with it. </div></div>

Well there you have it!

Shooting Chrony's are the LEAST reliable source of chrono information on a load.

My experience mirrors KNIGHT11B4's- 16-20 SD's when shot over CED and when I'm lucky, our local Sheriff's Office's Oehler

Southwest's 308 is about some good shit. </div></div>

Yup Knight used my CED. And it was checked against another rifle we shot, and it showed the value I was expecting for that ammo.
 
#14
Re: Southwest Ammo .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: dieselgeek</div><div class="ubbcode-body">Nice. I left them three voicemails trying to buy some ammo from them. Ended up going with factory federal SMKs. Maybe next time
smirk.gif
</div></div>

Really? I have had a great experience ordering ammo from them, really good customer service. Last time order 100 rounds of the run-n-gun 175gr SMK 308s and when I got it I found that half the order was of 147gr FMJ rounds. I called them up and they sent me the correct 175gr SMKs right way.
 
#15
Re: Southwest Ammo .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: dieselgeek</div><div class="ubbcode-body">Nice. I left them three voicemails trying to buy some ammo from them. Ended up going with factory federal SMKs. Maybe next time
smirk.gif
</div></div>

I apologize for this. We switched phone companies recently and weren't receiving all of our voicemailes for a time, had only one line, and no call waiting. This should be sorted out now.
 
#16
Re: Southwest Ammo .308

The customer service was fantastic for me too; I'm going back out this weekend and will chrono more on a different chrono and see if there is any difference in the results.
 
#17
Re: Southwest Ammo .308

Thanks for taking the time to post the chrono numbers. If you are unhappy with the performance of the ammunition at all, feel free to call me for replacdment or refund.

The numbers from the first post are off from our typical results and lot to lot spot tests. Typically, we see 2585 with a 19.5" Remington barrel, and 2650 with a 24". The Bartlien barriels are typically faster than stock as well. SDs are usually in the 10-15 fps area, and for anything approaching 20 (which is rare), we tear down, clean, re-lube, and tighten the machine.

Thanks,

Mike
 
#18
Re: Southwest Ammo .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: MikeSWammo</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: dieselgeek</div><div class="ubbcode-body">Nice. I left them three voicemails trying to buy some ammo from them. Ended up going with factory federal SMKs. Maybe next time
smirk.gif
</div></div>

I apologize for this. We switched phone companies recently and weren't receiving all of our voicemailes for a time, had only one line, and no call waiting. This should be sorted out now.

</div></div>

I'll def call you guys next time. I just could not wait any longer. Thanks for the Reply
 
#19
Re: Southwest Ammo .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: MikeSWammo</div><div class="ubbcode-body">Thanks for taking the time to post the chrono numbers. If you are unhappy with the performance of the ammunition at all, feel free to call me for replacdment or refund.

The numbers from the first post are off from our typical results and lot to lot spot tests. Typically, we see 2585 with a 19.5" Remington barrel, and 2650 with a 24". The Bartlien barriels are typically faster than stock as well. SDs are usually in the 10-15 fps area, and for anything approaching 20 (which is rare), we tear down, clean, re-lube, and tighten the machine.

Thanks,

Mike </div></div>

They shot well, I don't want my OP to look like a complaint at all. I bought a chrono the day before and brought it out to get some data and was just reporting the numbers. I will take more measurements the next time I am out and see if it (whatver it is) settles down.

Here is a 5 shot group at 300 yards. Red circle diameter is 2.000. can't complain here.

2011-05-08_19-19-09_908.jpg


 
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