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· Inactive account
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Hi, ex:
Quickload, which is $150, is the best program. I'll try it on my old Powley computer (slide rule type) if you can give me the case capacity in grains of water, with a bullet seated. Weigh a fired case, fill it with water, push a bullet in to the seating depth so the extra water squishes out, wipe off the outside and weigh it again. Give me the length of the bullet too.

Bye
Jack
 

· Inactive account
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7,804 Posts
Hi, ex:
I'm afraid the old Powley Computer can't handle this one. It was designed around ratios of charge to bullet weight in the .30-06 range or 1:3 and your .375 win is about 1:9. Doing a bit of off scale guessing (so don't take this as anything near reliable), I get a prediction of 24 grains of 4198 for 1778 feet per second. Now adjusting for 3031, I get 27.7 grains max. Adjusting for the known error in the Powley equations with straight cases would get your 30 grain load within limits, just. As this is just a wild guess, don't bet your hide on it.

Some of the gents over at Accurate Reloading have Quickload and do run it for others.
http://www.serveroptions.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=forum;f=6;DaysPrune=


Check out this site if you want to see the Powley math. Click on "IMR Powders" in the left side scroll box.
http://www.aeroballisticsonline.com/

Bye
Jack
 
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