Double Tap fudging their numbers?

[Squatchy]

I got a chance to run some of my 10mm rounds through my chrono and the following were my findings. 10 rounds were fired for each test using a Glock 20SF Gen 3 w/ 4.61" Lone wolf stainless barrel




Double Tap 230gr(claims 1120fps)
Min-944fps
Max-982fps
Spread-38fps
Average-957fps

Double Tap 200gr(claims 1250fps)
Min-1070
Max-1114
Spread-44
Average-1094

Federal Hydrashock 180gr(claims 1030fps)
Min-1008
Max-1023
Spread-15
Average-1011

Remington UMC 180gr(claims 1150fps)
Min-1039
Max-1083
Spread-44
Average-1052

Federal 180gr lead cast(claims 1000fps)
Min-896
Max-955
Spread-59
Avg-929

It could be that these rounds were tested out of a 5" barrel but who knows. The double tap didn't perform much better than a 45+p round in similar bullet weights. I guess I'll be sticking with underwood or buffalo bore for my future purchases

[dkf]

Chronos can vary a bit however your findings have been proven by a LOT of other people over the years that have ran Double Tap ammo over the chrono. Double Tap's velocity numbers are over generous and a lot of people don't buy their ammo anymore.

[BionicMan]

I actually moved from Double Tap to Underwood myself a year or so ago based on both performance and cost.

[animalmother85]

It also depends on the gun. My glock 19 shoots the same loads as my M&P 9 Pro at about 100fps faster, and it has a shorter barrel.

Also, if a company uses a test barrel, that's what they are getting their numbers from.

[Brick]

You must know what the company uses as a test fixture. Many do not use a standard pistol for testing.

[DucatiRon]

I just find it really funny how under powdered all the ammo is. My home rolled 180's chrono out if my G20 at 1120. And I think those are pretty weak. Just my standard IDPA load.

What a shame for store bought ammo. I wonder if Sigs new line of 10mm ammo will be any better ?