I'm looking at reloading supplies trying to decide what I should get. I'm just pricing everything out right now, but I'm stuck at trying to find moulds for 7.7 Jap. I know the closest two calibers are .31 and .311 but the closest I can get is .309 and .312. Which would be the best option to go with? Are there other sites out there that sell the moulds I need, or am I stuck with finding the best, closest thing?

 

And advice you have is appreciated.

go with the .312 -

I believe what you would want to do is get 312 and then size them

Yoiu need to slug your bore to be absolutely sure of the diameter. Midway and Brownell's has kits for this so you can do it yourself. I would use cast bullets sized .001" over bore size. Look at molds made for 303 British.

After I searched and searched last night and some great advice djg, I figured I should go with the .312 mould and size the cast bullet down to .311. I would attach the Excel Spreadsheet I used to list and calculate what I needed but the forum doesn't support .xls formatted documents. Thanks for the input guys!

 

 

EDIT: After looking through more web sites, and gathering more information the bullet size will either be between .31 and .313 so I'll have to slug the barrel to get exact dimensions.

Edited February 28, 201115 yr by mgralley