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Discussion Starter · #1 ·
I posted some earlier information on the .40 super as loaded by Triton in the accessories thread under .45 Super. On Saturday I had the opportunity to revisit the .40 Super while at the range with a fresh supply of 135 grain loads and a new STI .40 Super pistol, I ran a few rounds through my model 35p and was dismayed to see an average velocity of 1,687 fps. At first I believed it was the new STI barrel as it is not uncommon to have variations of 50-100 fps due to barrel tolerance and design differences. I then changed over to an earlier Heinie 5" with a Barsto barrel that reliably clocked over 1,800 fps in an earlier testing session in March.
The new ammo is all from lot#121487 and I am very surprised at these production variances.
Additionally I noted a sharp decline in accuracy both a from the rest and handheld
With both pistols averaging "1.25-1.5"" @ 25 yards.
Has anyone else experienced this type of variance? I am temporarily withdrawing my recommendation for the .40 Super/Triton combo until I can speak with Triton and do further testing.
 
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Discussion Starter · #3 ·
Here is apic of the "afflicted STI .40 Super"
It needs more power and I thought the TOPS 11" SteelHeart added the right touch.

 

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Some wicked stuff showin' there David;)
 

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I too have had great variances in their ammo. When testing their 10mm 135gr, the speeds varied by 100fps from my G20. I was less then impressed by the performance of the ammo itself.

Derek
 
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Discussion Starter · #6 ·
I wanted to update everyone and give Triton credit for fixing the .40 Super problem. I have recieved two seperate orders of .40 Super in .135gr and .165 grain and the velocities are dead on. Strangely enough I no longer have the fith round syndrome happening with the 165gr loads over the 135gr loads.
For what it's worth I am also quite pleased with the STI .40 Super 5.0.
 

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I think velocity consistancy is very close within lots (extreme spread), but lot to lot consistancy varies a bit I think.
The first article written about the 40Super was utilizing the STI trojan with a 6" ported barrel (I still have the magazine somewhere).

The author complained that the 135gr loads were not producing advertised velocities. He contacted Fernando of Triton and was sent a new lot# of the 40Super which did get to 1,800fps.

I have found that their 10MM 155gr advertised at 1400fps, will only do 1300, and this from a full size Glock with a polygonal barrel that is known for producing higher velocities.
 

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The author complained that the 135gr loads were not producing advertised velocities. He contacted Fernando of Triton and was sent a new lot# of the 40Super which did get to 1,800fps.

I have found that their 10MM 155gr advertised at 1400fps, will only do 1300, and this from a full size Glock with a polygonal barrel that is known for producing higher velocities.
I did not think to ask Ernie to chorno the Triton H&K in .40 Super at the IDPA nationals (my pal Dalton & I chronoed all the loads for the match) but I did shoot it.... I think the brass was doing 1200 fps when it ejected about 20 feet away ! :smile: I am gonna have to build one of these things if for nothing else to annoy the neighbors.

Cordially,
Jim H.
 

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I bought some early Triton 357SIG ammo w the Ranier 125 bullet.

BRIGHT flash, bullets keyholed on the target at 7yds, every now and then I would fire and get two holes about 6 inches apart! (BTW, a friend a few thousand miles away bought some 6 months later and had same results)

Triton was aware of the problem, sent me some free ammo to make up; that stuff was much better (looked like a XTP bullet).

The 155/40 QS was not as fast as advertised, but the 1150 I got was enough for me, no/low flash, accurate, reliable.
 
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