Molds for jap 7.7 at 215gr

[stormingnorm]

Looking to shoot my jap 7.7. I was told the heavier bullets, ie 200 to 220 were better than lighter. I was trying 125 gr,174, and 180. I would like to find a good mold and use the jap to learn how to make my own. I was also thinking about using gas checks on them. On another thread I was told I need to have my 7.7 bore sized out to make sure I got the correct length and dia. I am guessing I need to have a gun smith do this? I am resizing 3006 brass to jap 7.7 as 3006 brass is much cheaper and easier to get.

[Yodogsandman]

To make a pound slug of your chamber for proper dimensions, see this sticky...

http://castboolits.gunloads.com/showthread.php?218414-FYI-This-is-how-I-do-a-pound-cast

No gunsmith required!

[paul edward]

If you slug the bore of your Arisaka, you may find that it is a bit loose in the middle. Mine measured .312 so I loaded some 311299 with gas check sized at .313 and weighing 212 grains in Norma brass with 12 grains of Unique. Modest accuracy, not much recoil.

[madsenshooter]

After you figure out what bore and groove dimensions you have, NOE makes many oversized molds. You're starting out with a rifle that it isn't easy to get shooting though. The rounded rifling requires harder alloys for higher velocity. Not such a big deal if you're just looking for low recoil fun loads though.

[stormingnorm]

How do you slug the bire?

[runfiverun]

That you can find that out in the sticky's.

However I would forget about the barrel and look at goodsteel's sticky on doing the pound slug.
Then I would go to the accurate molds website and look at the 215gr loverign design he Hans there and order it in the appropriate diameter.
If I had to guess (from measuring mine) that would be in the .314-.315 area so a .316 mold would work in that case.
But you really won't know unless you measure.

[stormingnorm]

Ya yodogsandman sent me some slugs to pound. They came out at .314 . I ordered a .314 mold on the group buy.