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Quick load

Retired shooter

Retired shooter

Gold $$ Contributor
Looking for some information from those experts using the Quickload program.
Actually have several questions but one at a time. I will attempt to be specific with my question.

When entering the powder type, and grain information, after pushing the calculate button the screen will show pressures, and velocity, along with other data. In the box under that it tells you to press here for more info. That pop up box gives you other good data, it will tell you per cent of powder burn at X number of inches per barrel length.

Now for those still with me let me ask this. To my way of thinking ( which usually gets me in trouble) I would (assume) another problem area, that we would prefer to obtain complete powder burn just short of the muzzle creating more bore pressure. When researching different powders I am finding some with complete burn at 12 inches of barrel length ( obviously a faster burn rate powder ) others with high percentage of burn rate at 16/18 inches of barrel length ( obviously a slower burn rate powder.)

As always several ways to interpret this, and I am a rookie with the Quickload program. What & how do you experienced guys say about this.? Just one part of the formula , others important areas also, but a starting point.

Thanks.

Sorry for the double post. MY BAD. I own it.:rolleyes:
 
Retired shooter said:
What & how do you experienced guys say about this.?
Click to expand...
I may not directly answer your question.

I use QL (now GRT) mostly for information on velocities/pressure given my rifle, bullet & powder
- by having my case WC input and adjusted for my rifle
- powder, I can adjust the powder burn rate for my powder lot
- it does tell me the % of the powder that is calculated to be burnt before bullet exit
- case fill and bullet seating depth (used for different purposes)
- barrel time used along with Chris Long charts for node
- load increments velocity and pressure, so I can see if I am approaching excessive pressure before I get there

I try to start by picking a powder of the burn rate that gives good accuracy and the percent fill I want. I don't pay much attention to where the powder burn is complete (maybe I should).

I tend to keep records of everything. Here are some of my comments after shooting.

Load 2 Chrony Data.jpg
 
I use this QL screen for most of my load development. In this case QL didn't have TS 15.5 in the data, so I used RL 15 conservatively and shot a ladder to get actual velocities and how I need to adjust my powder burn rate. Probably not something I would recommend for others, but sometimes it is all I've got. But it does provide me with a guide of calculated pressure/velocity understanding the connection may be limited in use.

Load OCW-11 Quickload.jpg
 
Thank you guys
All the things you mentioned are why I started with the program, using a gas gun I am concerned with pressure. I was / am curious about the percent burn in regards to the effenciey of the powder , and ultimately the loaded round.

Thanks
 
jepp2 said:
I may not directly answer your question.

I use QL (now GRT) mostly for information on velocities/pressure given my rifle, bullet & powder
- by having my case WC input and adjusted for my rifle
- powder, I can adjust the powder burn rate for my powder lot
- it does tell me the % of the powder that is calculated to be burnt before bullet exit
- case fill and bullet seating depth (used for different purposes)
- barrel time used along with Chris Long charts for node
- load increments velocity and pressure, so I can see if I am approaching excessive pressure before I get there

I try to start by picking a powder of the burn rate that gives good accuracy and the percent fill I want. I don't pay much attention to where the powder burn is complete (maybe I should).

I tend to keep records of everything. Here are some of my comments after shooting.

View attachment 1436527
Click to expand...
How Is the RL 16 powder working for you.? That happens to be one I am interested in.
 
Powder burning causes a pressure increase of course. Much of this pressure still exists even if powder is all burnt until bullet reaches the end of the barrel when pressure drops to zero, of course. You want the maximum average pressure pushing the bullet as long as possible to increase velocity so build pressure early versus slowly is why maybe you don't want to wait until just before bullet exits to burn last of powder ????
 
Retired shooter said:
To my way of thinking ( which usually gets me in trouble) I would (assume) another problem area, that we would prefer to obtain complete powder burn just short of the muzzle creating more bore pressure.
Click to expand...
What if I told you... this doesn't matter?

I know for many of us, it never sits well... the concept of not burning 100% of the powder charge and being inefficient or wasteful.

In the end, there is no rule that couples 100% powder burn to accuracy.

I was in shock and horror when I worked the bigger guns. I couldn't understand how or why it was acceptable for so much unburned powder to go out the muzzle, but I was a rookie and it took me a while to come to grips with reality.

Be careful going too far down a rabbit hole with an assumption that you have not researched well in advance. It can cost you a lot of time and money only to learn that your assumptions were wrong and you could have saved yourself the trouble.
 
Magnum
"You want the maximum average pressure pushing the bullet as long as possible to increase velocity so build pressure early versus slowly is why maybe you don't want to wait until just before bullet exits to burn last of powder ????"

I appreciate your reply, and your explanation. I have no experience with the program, I can see how your explanation would work with a shorter barrel. Shorter barrel and lighter projectile usually requires a faster burn powder. Longer barrels and heavier projectile again, usually require a slower burn powder. I am sure someone will correct me if I am mistaken.

In my situation I have a 26 inch barrel, and heavy projectile, again ( I assume) a slower burn powder, and longer burn time per inch of barrel would be more efficient. Complete burn or high percentage of burn before the end of the barrel.

Other thoughts and experiences gladly accepted.

Thanks to All
 
RegionRat said:
What if I told you... this doesn't matter?

I know for many of us, it never sits well... the concept of not burning 100% of the powder charge and being inefficient or wasteful.

In the end, there is no rule that couples 100% powder burn to accuracy.

I was in shock and horror when I worked the bigger guns. I couldn't understand how or why it was acceptable for so much unburned powder to go out the muzzle, but I was a rookie and it took me a while to come to grips with reality.

Be careful going too far down a rabbit hole with an assumption that you have not researched well in advance. It can cost you a lot of time and money only to learn that your assumptions were wrong and you could have saved yourself the trouble.
Click to expand...
I know where you are coming from and appreciate the reply. I ask questions in an attempt to learn.

Thanks
 
jepp2 said:
In my 6 and 6.5 CM's although I shoot a lot of different powders, it normally comes down to RL 16 and H4350 provide the best accuracy.


I've kind of stopped buying the QL updates since I am using GRT almost exclusively now, but thanks for the info.
Click to expand...
I used QL for a few years until my Windows program went down the drain. Switched to OIS and never looked back but did like being able to save a lot of time and components with QL developing a new load.
Having said that, I am unfamiliar with GRT. What is it and does it run on OIS platforms?
 
Tried . Was told it would erase both. Been there done that did not work.

Now back to the original question. Rephrased Does powder being totally burnt just before the end of the muzzle eaqul more eficiency ( better VELOCITY) used in longer Barrels with heavier bullets. SLOWER burning powder.

Is it more efficient to have a longer,
(slower burn rate powder) complete burn closer to the muzzle Or have a faster complete burn, ( faster burn rate powder ) in the first third of the barrel.

As I said originally just started with Quickload, and noticing burn rates.

Any one with facts.
Thank you.
 
Remember that "Burn Rate" is an over simplification on a chart.

In the real world, the energy released depends on several other parameters not shown on the chart.

That means.... you can find that some of the ones close together on the chart were not measured the same way, and their "order" will change depending on the context.

Also, we need to stop boxing the "percent powder burned in the barrel", "velocity", and "efficiency" together in a sentence such that the question is loaded. Those are not locked together.

To get to the second part of your question about exploiting slower burn in a longer barrel to get a higher velocity.... you must also mentally integrate the whole pressure curve to get the velocity, but you still have to keep it real.

It is cold comfort to generate a peak pressure curve early or late in the barrel, without also including the concept of integrating the area under the pressure curve.

We live in a world where there are real materials, that have real limits. We cannot ignore the physics and thermodynamics, nor can we pretend that barrels and cases won't burst.

If we keep hypothetical questions real, then those real limits apply and the discussion makes progress.

That said... in theory, if we keep it real... yes, a longer tube with a "slower" powder, behind a "heavy bullet" generates a higher potential velocity when that adds up to more area under the pressure curve. That isn't to say we don't throw unburnt powder out the muzzle... or that we even care... YMMV
 
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