How do you ream out a pistol cork grip to fit your blank?

You can't do it with a push-pull motion. You have to get a reamer that fits snug in the bore and twist it in. Then as the bore enlarges you move to a larger reamer, twist that one in and keep going that way.

You can bore through the butt end of the pistol grip and ream it the usual way but then you have to go back and plug the end hole with a mix of cork and glue or insert a plastic plug of some sort.

Just use a regular cork like you'd plug a bottle with. Hardware stores should have many different sizes. I know that the craft stores around here carry them in bags with 4 or 5 different sizes included.

Bill in WV

On the cork pistol grips that I've been using, the hole in them is 5/16". I glued a pin into the end of a 5/16" dowel so that I could insert the dowel and push the pin out the center of the back of the grip. I then carefully sliced (I used an Xacto knife) around that pin at an angle to end of the 5/16" hole. This piece that I carefully removed is simply glued back into place after reaming the grip to fit. Works pretty well for me and although if I look really carefully, I can see that I did it, I haven't had the new rods' owners ever be able to tell it.

Putter
Williston, ND

Putters way works really well.