Painless load development (mine)

[streamerfish]

There definitely is a way to correlate. The problem is we...or most of us, just don't have the data to do so effectively. If we had some load data that showed the same bullet, powder, brass etc with loads at 3 or 4 different COL then we could do some extrapolating. Just don't have the info. You can do some simulation stuff on Quickload or GRT. But I wouldn't trust either explicitly.

Where to safely start would probably depend on what cartridge your running, and how big of an increase in in COL. Personally I would start maybe 1grain lower instead of the "standard" 2 grain drop to pressure ladder. But it would depend on how big a difference in COL it is, what cartridge it is, and which powder it is.

I would also add to this......If your running the same powder, stretching the COL a bit, and adding proportionally more powder, your pressure curve is going to be roughly same, your velocity is going to be pretty similar. You might be squeezing a bit more out of it. But its going to be a pretty small difference, a white noise difference so to speak.

Your heading into painful reloading and out of painless reloading.......heading into the white noise space...

 

[streamerfish]

thanks guys. Any suggestions for a next step for the "painless load development" method. Shoot a 10 shot group with 4831 at 45gn & 4350 at 42gn? Or back down further. Then pick the best group as my load and let it rip at distance? FYI i was shooting a t 1500 ft and it was 90 degrees out, so I dont see my self hunting in hotter or low elevation than this.


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I apologize if I missed it somewhere, what's your overall length?

You can often times go a bit above max in a .243 due to the relatively low saami spec. But this is very barrel dependent.

Personally, I would be very hesitant to go more then 1 grain over book max.

 

[huntsd]

I apologize if I missed it somewhere, what's your overall length?

You can often times go a bit above max in a .243 due to the relatively low saami spec. But this is very barrel dependent.

Personally, I would be very hesitant to go more then 1 grain over book max.

I dont have that # with me right now. But I am using a M+ mag and am just inside of that. Guessing about 2.95-2.97 ".

 

[Alpha Echo]

I would also add to this......If your running the same powder, stretching the COL a bit, and adding proportionally more powder, your pressure curve is going to be roughly same, your velocity is going to be pretty similar. You might be squeezing a bit more out of it. But its going to be a pretty small difference, a white noise difference so to speak.

Your heading into painful reloading and out of painless reloading.......heading into the white noise space...

Super helpful, and logical, to look at percent change in COL to determine a rough ceiling for percent change in charge weight (assuming all else, including powder type stays the same) to maintain roughly the same pressure curve and velocity.

But yes, to your point, easy to fall into yet another rabbit hole.