Self Centering Core Pins

[BAGTIC]

I like the self centering core pin design that LEE uses on some of its Minie designs. It sure is a lot faster and easier than the separate detachable pin used on my Lyman shotgun slug moulds.

Are there any other mould makers (production or custom) that use a similar design for either hollow base of hollow point moulds.

[shooter575]

Yup,I also hate the Lyman core pin.Here are two types that are better than the Lee. Rapine is on the left.RCBS on the right. Bottom is a Parker Hale Lyman type mould I changed to the RCBS style


http://img.photobucket.com/albums/1003/shooter575/moulds_2.jpg

http://img.photobucket.com/albums/1003/shooter575/moulds_3.jpg

Just need a new shorter pin [flush to bottom of mould blocks] D&T for a screw. Piece of .75x.125 bar stock[with slots].And a couple of longer socket head screws.Some moulds need to have the slots on a angle,some dont.Just spend a lot of time stareing at the bottom of the mould while opening and closeing and you will figure it out.Piece of cake
I got a whole pile of them to do when I get roundtuit

[Buckshot]

http://www.fototime.com/26496D670796088/standard.jpghttp://www.fototime.com/AD6CEF56C8FE717/standard.jpg

..............This is one I did for a member here as a test. Only problem reported by the user was that the slug was a bit hard to get off the HP pin. And that would be a PITA! It may have been the choice of material I used, or perhaps not enough draft on the HP pin?

.................Buckshot

[grumpy one]

Buckshot,

Isn't the bullet likely to shrink onto the pin as it cools? If you need such an ultra-long pin, maybe some release agent on it, or a way to rotate the pin in the bullet before you open the mould? I like the latter option, but of course you'd then have to keep the pin from wobbling even though it would be in a bearing with clearance. Seems unlikely you can get a huge amount of taper onto that pin without messing up the design of the hollow space it leaves behind, and anyway I'm guessing the real problem is that the bullet is slightly stuck to the pin, which wouldn't be fixed by increased taper.

[Buckshot]

............The hp pin isn't really that long. There is the centering portion which is the largest OD there close to the guide plate, and then another step down about mid way to the end.

...................Buckshot

[Firebird]

Any constant diameter, untapered length of the pin that touches the bullet would just give the bullet a place to hold onto as the bullet cools and shrinks in diameter. I know it's more difficult to setup on the lathe, but make the pin tapered for the entire length that is inside the bullet and hopefully the cooling bullet would squeeze itself off of the tapered pin as it shrank.

[Jetwrench]

Fine work there Buckshot mitey fine indeed JETWRENCH