bangerjim
12-29-2013, 08:37 PM
There is an old thread a few years old about drilling out the nose of standard cast boolits to make HP's. Not much info I can find since 2010.
With my little 3C precision collet lathe with an adjustable collet stop for "chucking" depth control and a travel stop on the tail stock, I can control the drill depth to less than a thou.
I have played with a few cal's and on the 40 it takes a 175g to about 165g for a good hole. Diameter is slightly smaller than the meplate of the slug. Depth is about 0.2" depending on the shape of the nose.
Does the bottom of the HP need to be pointed? Or can it be a standard drill bottom?
Making them for 38,40,and 45's is sure easier that messing around with buying and learning cast HP molds.
And with the above lathe set-up, it is really fast to drill 'em.
Any comments or suggestions? Or new info?
bangerjim
With my little 3C precision collet lathe with an adjustable collet stop for "chucking" depth control and a travel stop on the tail stock, I can control the drill depth to less than a thou.
I have played with a few cal's and on the 40 it takes a 175g to about 165g for a good hole. Diameter is slightly smaller than the meplate of the slug. Depth is about 0.2" depending on the shape of the nose.
Does the bottom of the HP need to be pointed? Or can it be a standard drill bottom?
Making them for 38,40,and 45's is sure easier that messing around with buying and learning cast HP molds.
And with the above lathe set-up, it is really fast to drill 'em.
Any comments or suggestions? Or new info?
bangerjim