Reloading powder data

[giuliocn85]

Hi there.
I'm reloading with RS 70.
I'm using Gordon Reloading Tool. I've compared the powder specification on GRT to QUICKLOAD and I have found out that they use different data (for example burning rate). Of course if I try to simulate a cartridge, these two software give me different muzzle velocity.
Can you please help me?

 

[Liveonce]

have you tried p-max ?

 

[giuliocn85]

have you tried p-max ?

I have Just tried and the result was different top.

 

[finnbear270]

These data sets are for the guidance of experienced reloaders, and data will undoubtedly differ in certain boxes, with same inputs.

 

[giuliocn85]

These data sets are for the guidance of experienced reloaders, and data will undoubtedly differ in certain boxes, with same inputs.

In your opinion what's the best software ?

 

[finnbear270]

My opinion is just that, it may not match your expectations, & there are other much more knowledgeable re loaders on here who will no doubt be better sources, Laurie and Muir for two examples, Steve.

 

[zambezi]

My opinion is just that, it may not match your expectations

That sounds spot on.

None of the simulations seem to get it right 100% of the time. Which, in part, is because there are so many variables in play from rifle to rifle, brass, dies, etc.

The powder makers use a standard rig for their testing which may differ dimensionally from your rifle in significant ways.

But what the powder-maker's data will definitely supply is a heavily tested range of charges for each cartridge combo.

If you start near a powder maker's min value and work up, you cannot go far wrong.

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I get good results from GRT for most chamberings in the powders I use. But note GRT's calibration levels. [the meter indicates depth of data afaik]

 

[Eric the Red]

Hi there.
I'm reloading with RS 70.
I'm using Gordon Reloading Tool. I've compared the powder specification on GRT to QUICKLOAD and I have found out that they use different data (for example burning rate). Of course if I try to simulate a cartridge, these two software give me different muzzle velocity.
Can you please help me?

The programmes are all slight variations on a theme - that is theoretical. I would not get hung up on the velocity presented - you need to get the actual velocity from your rifle in your conditions. These programmes should lead you to an accurate load which is the aim - velocity (IMHO) comes second. They shouldn't be massively different.

 

[Neddle]

In your opinion what's the best software ?

GRT

 

[webley701]

In your opinion what's the best software ?

Frankly - the powder & bullet makers published data.

I do use Quickload & GRT for certain purposes (e.g. narrowing down the choice of likely components) but after that I defer to published ‘tested’ data.

 

[25 Sharps]

Hi there.
I'm reloading with RS 70.
I'm using Gordon Reloading Tool. I've compared the powder specification on GRT to QUICKLOAD and I have found out that they use different data (for example burning rate). Of course if I try to simulate a cartridge, these two software give me different muzzle velocity.
Can you please help me?

Use manufacturer’s data, load some test loads, go and chrono them!

 

[borbal]

these two software give me different muzzle velocity.

How different was the muzzle velocity? What accuracy are you expecting?