45-70 Relaoding questions

[Handshaker]

Maybe I'll test them out of my BFR first, and if they feel like a deer fart I know I am GTG

 

[GeoDudeFlorida]

That's what QL tells me, and that is cross-referenced with other data that supports it.

I would be very careful with that calculator... there is no way 19400 CUP translates to only 11508 PSI. FWIW, if you take comparable loads, with something like the .30-30, look at reference data with a mix of PSI and CUP. You will see similar charges measured in CUP to be lower than similar loads measured in PSI, not higher.

That’s because correlation has zero precision. It’s a subjective assumption based on subject-selective data. Self-selection bias invalidates the conclusions drawn from the data.
Converting centigrade to Fahrenheit is precise. Converting millibarsHg to Pascal is precise. Converting inches to meters and grams to grains are all precise because they have common units which exchange. They measure the same things the same way but in different units. Stoichiometry is a real part of mathematics.
PSI and CUP do not measure the same things in the same way. They have no common units Trying to build a data collection and intuit some kind a correlation isn’t going to work. There’s no direct, precise, or accurate way to convert CUP to PSI.

 

[Handshaker]

What language are you using? This is WAY over my head, lol.
Thanks tho, I'll be careful.

 

[Charlie98]

Maybe I'll test them out of my BFR first, and if they feel like a deer fart I know I am GTG

What language are you using? This is WAY over my head, lol.
Thanks tho, I'll be careful.

Not to sound overbearing, but this is not trivial.

The point Geo was making was the same point I was... just a little more better. There is no reliable conversion for CUP to PSI, or vice versa... if there was, everyone would be using it. As it stands, data in CUP is valid, and data in PSI is valid... but you can't extrapolate one into the other, and there is really no reason to. The data in PSI, likely created with more modern equipment and testing methods, should be used over comparable data in CUP, if possible.

You are loading for 4 firearms that take the same cartridge, but are about as far apart as anyone could likely get while still using the same cartridge. It is very likely you will have to generate 3 or 4 different loads... one for each platform, and it's own individual capabilities and LIMITS. You need to know what those limits are, and load accordingly.

 

[Handshaker]

I get it now. Whatever the CUP is, the load I have selected is a starting load for trapdoor rifles, which is the lightest load I could find. Not to say there might be a lighter load out there but for trail boss this is it.

 

[Grumpy_old_Fart]

CUP= Copper units of pressure

 

[Handshaker]

• OSLT – Or Something Like That

 

[johnjohn]

I think what GeoDudeFlorida is saying is "there ain't no way to get there from here".