Enlarging a Lee push through sizer

[Archey]

I needed a 0.302" push through sizer for paper patching 30cal. I ordered a .285 sizer and ran a "M" sized drill bit witch got me to .295". This left a step instead of the taper that Lee uses. I finished the last 0.007" with a strip of sand paper in a cleaning jag chucked in the drill press. Run the sizer into the spinning jag until it got easy. I would load the sand paper up with 320 grit grinding compound each time. Each pass of the sizer in the spinning jag would remove about 0.0015". The finished sizer produces a perfectly round, 0.3020" boolit. The sandpaper method left a very nice taper leading up to the sizing ring. Very easy to do with a drill press. Use lots of cutting oil with the drill bit, that is some very hard metal.

[DougGuy]

I thought about doing that to a .430" die, I needed a .432" and Lee isn't taking any custom orders. Got lucky and found a .432" on ebay, NIB, probably Ranch Dog leftovers, so I got that one and sold the .430" which worked out great.. Good to hear it wasn't too much trouble, I was going to do mine with some cloth abrasive in a slotted dowel since I only needed .002" taken out.

[cdngunner]

I just opened up a 357 to .3595 for use with my 38/200

Threw it in my little hobby lathe hit it with a little 600 emery cloth. finished it off with some valve lapping compound.

took a lot less time then I figured it would...hope the bullets are still round

[zuke]

I needed a 0.302" push through sizer for paper patching 30cal. I ordered a .285 sizer and ran a "M" sized drill bit witch got me to .295". This left a step instead of the taper that Lee uses. I finished the last 0.007" with a strip of sand paper in a cleaning jag chucked in the drill press. Run the sizer into the spinning jag until it got easy. I would load the sand paper up with 320 grit grinding compound each time. Each pass of the sizer in the spinning jag would remove about 0.0015". The finished sizer produces a perfectly round, 0.3020" boolit. The sandpaper method left a very nice taper leading up to the sizing ring. Very easy to do with a drill press. Use lots of cutting oil with the drill bit, that is some very hard metal.

I've done the same thing, but without the drill bit.
Polished them up one at a time. I now have a 302,304,306,308,311,313,and 315 set.