New 20 Practical with new load development method.

[Justice1327]

So, I guess the question is, does the method work? Since those book numbers use the same fixed variables.....I assume....., then does that hold water for the different powders? Or does it all go out the window once it's in a different gun and all those variables change? I'd be curious to know because it could eliminate need to try all kinds of powders and use up reloading resources to find a load
I get that the numbers will change once the variables change, but will the sensitivity ratio hold?

I'm gonna try this in a few more popular cartridges that way I can have maybe four or five reliable sources to compare the velocity differences in the grain per charge weight differences. It'll take some time, but in the end, the spreadsheet will be able to sort it out and see if they are all relative or not

 

[Axl]

No offence, but if load development were that convoluted for me, I would put my reloading stuff on the sidewalk. The sign would say "Trade for some golf clubs"

 

[Justice1327]

No offence, but if load development were that convoluted for me, I would put my reloading stuff on the sidewalk. The sign would say "Trade for some golf clubs"

So what method do you use to look at a list of 10 different powders and decide on the one powder that would be the best for your Rifle.

 

[CoyoteConquest]

My favorite load I've found with my 20" AR is a 40BT with 29.3 gr of of LeverEvolution going 2790. The same load with a 32 gr BT is only going 2820 but it shoots really well also.

 

[DUCKMAN11]

These are just some of the testing I'm doing with the 20 practical. Breaking in the brass and the barrel. Pretty happy overall. one thing I thought was strange was my best group had seriously high SD's.
I'm trying out a new method to figure out which powder works best. Using online data resources as well as reloading manual resources what I'm doing is essentially, taking the difference in the lowest and highest velocity and dividing it by the difference in the amount of grains between the lowest and highest charge weight. Example: Low vel 2200 , High vel 2500. 300fps Difference.
Load weight range : 25-30 gr with 5 being the difference. 300 divided by 5 is: 60. You do this for each loading for the powder that you want to check and you use the one with the lowest number. What this is supposed to be telling you is that the powder with the lowest number is the least sensitive . still have a few more powders to test out but so far it's doing well.
I'm also comparing this to efficiency rating in GRT and quick load

Makes sense to me

 

[Philward]

No offence, but if load development were that convoluted for me, I would put my reloading stuff on the sidewalk. The sign would say "Trade for some golf clubs"

It's the spreadsheet worshipping analysts method of load development.

 

[Axl]

So what method do you use to look at a list of 10 different powders and decide on the one powder that would be the best for your Rifle.

I pick a bullet, and 2 powders. If they don't shoot, pick another bullet. If that doesn't shoot get a new barrel.

 

[Justice1327]

My favorite load I've found with my 20" AR is a 40BT with 29.3 gr of of LeverEvolution going 2790. The same load with a 32 gr BT is only going 2820 but it shoots really well also.

Thank you very much. I never thought about using lever evolution. I use it all the time in my 308.

 

[Justice1327]

I pick a bullet, and 2 powders. If they don't shoot, pick another bullet. If that doesn't shoot get a new barrel.

You must go through a lot of barrels.

 

[Axl]

You must go through a lot of barrels.

Well none due to load development. If a barrel doesn't like a bullet, there is no powder that will change that.