Range Report Factory ammo velocity variation

[jdizzle3id]

Finally chrono’d some Hornady 6.5C 140 ELD Match today. 20rds over my ProChrono digital.

I’m not too impressed with the results.
AVG 2710
ES 61
STDev 19

Is this what I should expect from factory match ammunition? I expected better. What are your experiences?

 

[Vitali1342]

Yep .., I've had same results with fairly good groups @ 200y ( about 1.25 to 1.5" ). What I did is tried different mach ammo and see which give me best grouping with best SD speeds . My rifle really likes Hornady 143 Precision Hunter which produces .4 MOA accuracy and about 11 f/s SD's.

 

[jdizzle3id]

I will say The 100 yd groups were all sub MOA. They weren’t “great” but I was shooting off a tripod for the first time so I wasn’t expecting great groups.

I moved out to 575yds and got 1 hit out of 5 on a 12”x12” target. Again, off the tripod so can’t fault the ammo.

 

[Racer88]

FWIW... 20 Rounds of Hornady Match ELD-M 140-gr through my RPR, using MagnetoSpeed V3:

SD: 9.6
ES: 27
AVG: 2662

 

[acudaowner]

did they shoot well for you ? maybe that run was not so good have you had that problem before? maybe its a fluke , the rest will be fine ? I am sure they don't make trash on purpose .

 

[Rocketvapor]

When you run 20 rounds across an optical Chrono it's tough to decide if a high or low reading was the Chrono or the load.
The ES and SD calculation is blind.

 

[b6graham]

I've had 147 eldm shoot with an es of like 5, 140 with an ES of 30, and prime do both.

get a magnetospeed and it'll probably shrink some. also, did some get left out in the sun/cold?

 

[jdizzle3id]

Yesterday at 8:36 AM
#6
When you run 20 rounds across an optical Chrono it's tough to decide if a high or low reading was the Chrono or the load.
The ES and SD calculation is blind.


Care to elaborate? Is it an inherent flaw in the technology or perhaps a resolution issue with a given device?

 

[b6graham]

Yesterday at 8:36 AM
#6
When you run 20 rounds across an optical Chrono it's tough to decide if a high or low reading was the Chrono or the load.
The ES and SD calculation is blind.


Care to elaborate? Is it an inherent flaw in the technology or perhaps a resolution issue with a given device?

highly dependent on sun and light. versus an oehler or magnetospeed

there's a reason they cost $80 versus $300 versus a few grand

 

[jdizzle3id]

I've had 147 eldm shoot with an es of like 5, 140 with an ES of 30, and prime do both.

get a magnetospeed and it'll probably shrink some. also, did some get left out in the sun/cold?

I have a magnetospeed. I get ESs in the 200s with it. I tried adjusting the position and distance to muzzle and yada yada but ultimately decided if it was that sensitive to position it wasn't very useful.

None of the ammo was exposed to the sun. As far as temperature, all of the ammo was exposed to the same temperatures ... in back of jeep on the way to the range, in my range bag before being loaded into the magazine and shot.

 

[Yellowfever440]

I was having pressure issues with the 140 gr eld hornady match. 8 out of 20 in 2 boxes where causing ejector Mark's and scratching g just a little. But the 129 gr hornady whitetail wasnt doing it. No chrono so I dont know the mv.

I would imagine your ammo was causing a little error when you moved to 575 yds. I would assume the tripod would help more then hurt.