Any Interest in a 4-Cavity Brass Mihec Paper Patch Mold?

[CJR]

I started a feeler thread, Group Mold Buys, to see if anyone was interested in getting copies of the NRA 301618 (160 gr.) and 301620 (196-204 gr.) PP molds 4-cavity brass molds made by Miha/Mihec. For those who don't know, the NRA staff used these designs in competitions up to a 1000 yds., so we know they work real well. If you're interested, sign up on the group buy thread. We need a minimum of fifteen (15) people to start this. If we get enough interest I'll scan some images and post them for all to see.

Best regards,

CJR

[scb]

Cost?

http://i487.photobucket.com/albums/rr236/scb2008/301620.jpg

[CJR]

Scb,

Miha told me that a solid bullet 4-cavity brass mold would cost about $95. Thanks for posting that image. The images I intend to post are the NRA dimensioned drawings for both bullets.

As an after thought. I know a tiny bit about ballistics and bullet designs and typically hollow point match bullets get the center of gravity (CG) further to the rear and away from the center of pressure (CP). The separation distance, between CG & CP, is then the restoring moment to keep the bullet stable during flight. So I was thinking, wouldn't it be nice to have a Cramer-style hollow-point mold option, say 1/16"ID, with a set of different length 1/16"D pins to keep adjusting the CG rearward in these molds. Soooo, if you were playing at a 1000yds, you could increase the stability of the bullet to specifically tailor it to your load velocity. Something to think about.

Best regards,

CJR

[barrabruce]

How about an adjustable mould nose pour design which I has see pics of.

[giz189]

Dang!!! You guys are gonna break me for sure.

[scb]

. So I was thinking, wouldn't it be nice to have a Cramer-style hollow-point mold option, say 1/16"ID, with a set of different length 1/16"D pins to keep adjusting the CG rearward in these molds.
CJR

I like the idea - but -. After thinking about it I have some concerns. With that small a diameter pin, getting as hot as they will, won't they become very susceptible to bending causing the bullet (boolit) to be rotationally unstable?
Just a thought.

[barrabruce]

What's the calculated B.C of them?

[CJR]

Barrabruce,

The NRA measured Ballistic Coefficients (BC), with firings done at 300 yds. at H.P. White Laboratory, Bel Air, MD, are as follows:

160 gr. 301618, BC =0.289
196 301620, BC= 0.354

Best regards,

CJR