Gordons Reloading Tool (GRT)

[Dazza9t9]

I have QL on my MacBook, running a partition, however it seems to take up an awful lot of space. Was hoping to transfer it onto an old, but powerful spare windows laptop o have laying about but it can’t be done.
I think I will get Gordon’s on it and give it a try
I’m not to loading so it may help me understand it a little better too

 

[The Farmer]

Registered first try for me. Have you checked junk/spam folder as it sent confirmation email link there

 

[andychas]

Ive just got this working on a mac book pro using Parallels Desktop, installed perfectly (thankfully!) now to start working out how to use the program, first look is very encouraging

 

[zambezi]

I have been using GRT for thick end of a year now. I really rate it. It has consistently given suitable loads for most of my center fires whose GRT predicted MV has subsequently been verified by chronograph on the range.

But there have been some exceptions. Principally some loads in 6.5x55mm have been off, for me. The powder database appears to be a collective effort: user data improves accuracy. Helpfully, the powder database has a "calibration" guage indicating the depth of data on which the modelling stands. Look at the stoplight graduated bar to the right of each powder.


One feature of GRT I stumbled upon recently was the Optimum Barrel Time [OBT] button. I surmise that the program is fine tuning the charge for maximum energy transfer to projectile for a given barrel length. What was uncanny is that the node I discovered for my .223 load by huge trial and error ladder testing is around the 24.8gr mar. The OBT pegs the optimum at 25.2gr. Had I seen that prediction, I would have had to build fewer ladder steps. I wonder if I need to add the moderator length...anyway there are gems in this freeware.

 

[andychas]

I have been using GRT for thick end of a year now. I really rate it. It has consistently given suitable loads for most of my center fires whose GRT predicted MV has subsequently been verified by chronograph on the range.

But there have been some exceptions. Principally some loads in 6.5x55mm have been off, for me. The powder database appears to be a collective effort: user data improves accuracy. Helpfully, the powder database has a "calibration" guage indicating the depth of data on which the modelling stands. View attachment 184984 Look at the stoplight graduated bar to the right of each powder.


One feature of GRT I stumbled upon recently was the Optimum Barrel Time [OBT] button. I surmise that the program is fine tuning the charge for maximum energy transfer to projectile for a given barrel length. What was uncanny is that the node I discovered for my .223 load by huge trial and error ladder testing is around the 24.8gr mar. The OBT pegs the optimum at 25.2gr. Had I seen that prediction, I would have had to build fewer ladder steps. I wonder if I need to add the moderator length...anyway there are gems in this freeware.

View attachment 184988

that's good to hear, Ive got a couple of loads sorted for my 6.5x55 so it'll be interesting to see how they compare and feed back into the GRT data pool. plus Ive got a couple of less standard ones to be developing loads for. It feels a fairly intuitive programme though, works a treat on the mac (with Parallels)

 

[25 Sharps]

Out of pure interest I was checking the web for any free (and more modern) alternatives to the “QuickLoad” PC application and stumbled upon “Gordons Reloading Tool (GRT)”.
Although new and still very much being developed GRT appears to have a lot nice features already, and great future potential ...and its completely free.
I'm only just starting to reload and for me GRT seems ideal.

For anyone interested in GRT there is a small article and video published on The Reloaders Network
Gordons Reloading Tool (GRT), How to Start Using - The Reloaders Network

and the link to the GRT site ...which has a quick registration to get to the software download
Gordons Reloading Community

Appologies if this tool has been covered in another post that i have missed elswhere on the forum.

BR ...and safe reloading,
SSC

Would be interesting to compare the outputs of GRT and QL with the same input data

 

[Neddle]

I have been using GRT for thick end of a year now. I really rate it. It has consistently given suitable loads for most of my center fires whose GRT predicted MV has subsequently been verified by chronograph on the range.

But there have been some exceptions. Principally some loads in 6.5x55mm have been off, for me. The powder database appears to be a collective effort: user data improves accuracy. Helpfully, the powder database has a "calibration" guage indicating the depth of data on which the modelling stands. View attachment 184984 Look at the stoplight graduated bar to the right of each powder.


One feature of GRT I stumbled upon recently was the Optimum Barrel Time [OBT] button. I surmise that the program is fine tuning the charge for maximum energy transfer to projectile for a given barrel length. What was uncanny is that the node I discovered for my .223 load by huge trial and error ladder testing is around the 24.8gr mar. The OBT pegs the optimum at 25.2gr. Had I seen that prediction, I would have had to build fewer ladder steps. I wonder if I need to add the moderator length...anyway there are gems in this freeware.

View attachment 184988

Have you a simple way to transfer projectile data when developing a load?

 

[zambezi]

Have you a simple way to transfer projectile data when developing a load?

Not 100% sure which data you mean. I suspect you are asking whether you can add a custom projectile to the GRT drop-down options? Yes, there is a tab for user projectiles:

 

[Neddle]

Not 100% sure which data you mean. I suspect you are asking whether you can add a custom projectile to the GRT drop-down options? Yes, there is a tab for user projectiles:

View attachment 190392

No, what i mean is there a faster way to change projectile that automatically populates the required data, not having to check everything manually

 

[zambezi]

No, what i mean is there a faster way to change projectile that automatically populates the required data, not having to check everything manually

Quite a lot of fields auto-populate. But some need your input as they have a material impact to calculations. A good example is case volume. Depends on the brass you use, length you trim cases, etc.

 

[Neddle]

Quite a lot of fields auto-populate. But some need your input as they have a material impact to calculations. A good example is case volume. Depends on the brass you use, length you trim cases, etc.

I'll look again tomorrow thanks for your help so far

 

[Neddle]

No, what i mean is there a faster way to change projectile that automatically populates the required data, not having to check everything manually

The window with projectile data in it, comes up slightly low on screen, click and hold up on its title bar and you'll get an option to apply data at bottom of screen

 

[Neddle]

The window with projectile data in it, comes up slightly low on screen, click and hold up on its title bar and you'll get an option to apply data at bottom of screen

Thanks i got this sorted

 

[Bavarianbrit]

I just downloaded the tool and I tried it with input of Hornady SSTs .270Win & VV N140 and to load to the same velocity as my store bought S&B PTS (same bullet as SSTs) the results were so close in energy output as makes no odds.

 

[Bavarianbrit]

I tried to do a VV N150 calc also which it lists on VV powders but I cannot add it to the calc, has anyone an idea how to add it?