lap .003"

[hiram]

I have a spare .429 450 sizer die. I need a .432. Is .003 too much to lap. Any trades available? A Lee .432 is good if they make a .432.

Thanks

[462]

I opened a Lyman .431" to .433". Go slow, and clean and test size often.

You may want to PM Buckshot...quality workmanship and fair pricing.

[RobS]

It'll work, I've gone .003 over just don't leave the lube pressure on very long as the lube will squeeze up between the guide rod and the inside of the die.

[JeffinNZ]

I lapped 3.5 thou out of a .313 to make a .3165 for my Pygmy. Had another birthday during the process. Those dies are real hard and for good reason. Can be done but it is not a 5 minute job.

[BOOM BOOM]

HI,
YES , can be done , will take a bit of doing though. Measure a lot, pin/hole gauges.
:Fire::Fire:

[hiram]

I got serious and lapped the die today. 432 perfect. There were times that production slowed down but I relaized the abrasive material was wearing smooth. Replaced the paper and off it went.

[462]

Good deal.

The number of tricks and skills that we learn, just to shoot boolits, is really amazing.

[Down South]

I've lapped several.

[geargnasher]

I took a .427" H die to .4315", but it leaks like a sieve unless pressure is released before ejecting each boolit. .002-3", no problem, but there is a point of diminishing returns.

Gear

[mdi]

Yep, as you've shown, .003" ain't too much. BTW, I got a Lee .432" sizing die from Ranchdog (I've got a Puma with a groove dia. of. 431" to .432").