what powder to use

[HVACscott]

just cast some 9mm hollow point from WW and they turned out 139gr after powder coating. I have been using Winchester 231 for my other cast bullets 9MM 115gr, RN and everything has been great. When i looked i cant find data on the 139gr on the 231 chart.

Im very new to the whole casting my own bullets and with the help here all has been going amazing well....the load im now using in the 115gr i was told what powder to use and how much....now that i have a new bullet how do i figuring out what powder and amount????

THANKS

[popper]

4gr 231. close to max.

[Conditor22]

Start with the beginning load for W231 or HP-38 and a 125-grain boolit and watch for pressure signs.

[JonB_in_Glencoe]

The Lyman cast bullet handbook 4th Ed. is a great resource for Data as well as all the nuances of loading cast boolit ammo. As you progress in this hobby, you will find that manual is indispensable.

As to the 139 gr.
Look for loads of the next weight bullet/boolit, probably gonna be 147gr.

[HVACscott]

just ordered book :-)

[John McCorkle]

Have you done the plunk test for your gun yet?

It helps you find the over all length for your guns barrel (especially good for pistols like the 9mm)

This in combination with feed testing dummy rounds will give you an idea of what overall length and amount of crimp you'll need in your bullets to feed and fit your barrel correctly

9mm is a booger sometimes but do this and it will help remove variables.

After a successful plunk test and feeding test ...if you have a kinetic bullet puller, pull a few out and measure the diameter of the boolit to make sure your brass isn't sizing the bullet down any...again, 9mm can be finicky sometimes.... removing variables helps fine tune what you focus on to correct any given problem you may be facing

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[fredj338]

Use 147gr data & work it up a bit.