Quickload Velocity Data

[MudBug]

Someone recently told me that they no longer feel a need to chrony their loads because the data they get from QL has been matching their chrony data anyway, so he'll just save time and delete the chrony from his range bag.

So what I'm curious about is how close has QL been for you? Have you found that QL does a good job of predicting velocity?

 

[ChadTRG42]

Re: Quickload Velocity Data

Always chrono it! It can't predict the extreme spreads of the rounds.

 

[Suasponte]

Re: Quickload Velocity Data

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ChadTRG42</div><div class="ubbcode-body">Always chrono it! It can't predict the extreme spreads of the rounds.
</div></div>
Ditto! I chrono every load that prints well for me! Quickload will give you a ball park without having to fire your rifle!

Nothing can replace range time and the chrono IMHO!

Terry

 

[sawgunner2001]

Re: Quickload Velocity Data

I've found it has predicted my rifle velocities pretty accurately, but was off significantly with my handgun ammo. I chrono everything.

 

[dar1246]

Re: Quickload Velocity Data

I purchase this program because someone was telling me of its capablities. He entered all the data from my rifle. It was a 100 fps off. I played with the program. It does give you some idea of where it might be. There is more to consider in everything than a program will tell you. Good tool for load development. Helps with chosing powders and such.

Chrono every load. Then take it to the field and shoot.

 

[Clark]

Re: Quickload Velocity Data

A wild card in QL velocity prediction is how hard the bullet is jammed into the lands.

The start pressure for off the lands should be ~ 2000 psi.
The start pressure for into the lands should be ~5000 psi.

This has been the key to getting QL velocity predictions to match my chrono data in 223, 6mmBR, 243, 257RAI, 260Rem, 270, 7mmRemMag, 30-30, 308, 30-06, 300WinMag, 7.62x54R, 8x57mm, and 338WinMag.

To get QL velocity to match the chrono in 44 mag rifle and 45 Colt rifle, the key match the start pressure with the crimp and to use loads that burn the powder in the barrel, not the fireball muzzle flash.

 

[moosetracker]

Re: Quickload Velocity Data

I always chrono my loads. Once you've entered all your custom data into QL, including average case volume in grs of H2O, it's surprisingly accurate. Once in a while, I have to ajust powder burning rate when using a new lot.