Software help wanted

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brybenn

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Could anyone with the proper software run some numbers for me please.
Im trying to figure out the max velocity for what would be a proof load for a 300wm and a 458wm
A 300wm is 64000psi and the 458wm is 62000psi max but a proof load is 25% greater. Im not trying to replicate it i just curious as to what 25% more than max would generate velocity wise. I am currently unable to locate such info on google myself
 
Just check to see what the average handloader is getting. From what I see, most are running at proof round pressures.

The "Pressure" we talk about is peak pressure. The pressure that does the work is all the pressure under the pressure curve. So boosting the peak does not get much of a velocity dividend.

That is, it is not linear.

If you want more velocity, use a compressed load of a slower powder.
 
coleman1495 said:
What powder and projectiles are you using? I need that information for Quickload.
Click to expand...

I generally run 180 gr in 300wm and 400gr in 458wm. I own the slowest 300wm ever made but my 458wm i load 72gr h4895 and 400gr woodliegh for 2400fps in a 26.5" barrel

I was just more or less curious as to what velocity the proof loads are at. I know theyre like 25% higher pressure but i dont know what powder or bullet or speed they get.
Im not sure how they establish the proof load whether its a extra heavy bullet or to much powder or an entirely unpublished load

I know my 458wm load is a starting load in the lee manual ive never loaded it hotter for the 400 to 405gr bullet range. Just got my thinking how it would compare to what a proof load would be
As for my 300wm i cant get a 180gr to 3000fps without flattening primers. Even most factory loads only clock at right around 2900fps. I know guys getting 3200fps in theres which i know isnt in the manuals
 
brybenn said:
I generally run 180 gr in 300wm and 400gr in 458wm. I own the slowest 300wm ever made but my 458wm i load 72gr h4895 and 400gr woodliegh for 2400fps in a 26.5" barrel

I was just more or less curious as to what velocity the proof loads are at. I know theyre like 25% higher pressure but i dont know what powder or bullet or speed they get.
Im not sure how they establish the proof load whether its a extra heavy bullet or to much powder or an entirely unpublished load

I know my 458wm load is a starting load in the lee manual ive never loaded it hotter for the 400 to 405gr bullet range. Just got my thinking how it would compare to what a proof load would be
As for my 300wm i cant get a 180gr to 3000fps without flattening primers. Even most factory loads only clock at right around 2900fps. I know guys getting 3200fps in theres which i know isnt in the manuals
Click to expand...

I’d need an accurate case capacity and COAL to get more accurate numbers. According to quickload, assuming you are using the 400gn weldcore bullets you should get 2313fps with a max pressure of 43384psi. Also you are at 95% case capacity.

If you packed the case at 110% capacity using 83.2gn H4895 you should get 2645fps and 68700psi.
 
coleman1495 said:
I’d need an accurate case capacity and COAL to get more accurate numbers. According to quickload, assuming you are using the 400gn weldcore bullets you should get 2313fps with a max pressure of 43384psi. Also you are at 95% case capacity.

If you packed the case at 110% capacity using 83.2gn H4895 you should get 2645fps and 68700psi.
Click to expand...

Awesome. Im using woodliegh 400gr ppsn. Im not sure if its a weldcore or not. I use ww brass and have never checked case capacity. I have a match gradr douglas barrel im told and its 26.5" long. Maybe why im hitting the 2400fps.
Is quickload available for android phones? I dont own a computer

When loading for the 458wm i started with the starting load for that weight class and put 3 thru the same hole at 50 yards. Loaded 20 more and they all landed in a group covered by a twoonie. I never went any further in load deveolopment. I do have the meticulous notes from the original owner for his loads somewhere. I was just curious about numbers. I have no intention of changing my loads unless i switch to 500gr woodlieghs if i go to africa for cape buffalo
 
Yeah I’d need to test the case capacity using water. No big deal. Seating depth causes variations too. Differences in powder lots also can cause substantial variation in velocity.Also barrels vary as well as chambers. The estimation is pretty close though. I think you would run out of case capacity first anyways.

Quickload is super handy for sure. You do need a computer to run it though. They still send a physical CD in the mail. Its like 300$ once its in your hands too.
 
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