.433" 330 LMN PB Dual Crimp Group Buy Starts Here

[only1asterisk]

The specs:
330 grains and minimum of .433” as cast
.450" or .500" crimp to meplat measurements
Additional information here: http://castboolits.gunloads.com/showthread.php?t=29187

Designed for .44 Magnum revolvers. Lever action rifle use is dubious at best.
This bullet has not been PROVEN to feed from any rifle at any OAL. Caveat emptor.

The terms:
This Lee Precision 6 cavity mold block group buy will cost $70 (including shipping for inside the US) for the first mold with $52 for every additional mold. This group buy will run with a minimum of 10 people. Interested buyers from outside the US should contact me for pricing.

A $10 refund will be returned with your mold if by some miracle we reach the 25 mold mark. Leftover monies resulting from the purchase of more than 10 molds (but less than 25) will be donated to offset the cost of running this forum.

All funds will be held until the group buy closes and will be returned if the 10 person minimum is not met. This group buy will be canceled and full refunds will gladly made available in the event that LEE quality control fails to meet minimum standards on outstanding group buys delivered before this buy closes.

I reserve the right to cancel this group buy for any reason. In that event, full refunds will promptly be made.

Molds will be sent out promptly by way of USPS once received from LEE. I can't guarantee delivery.

If the molds do not function as intended it will be incumbent on purchasers to reach a settlement directly with LEE either as individuals or group(s).

This group buy will close mid to late June.

These terms are nonnegotiable.

This is a No Whining™ group buy. If you don’t like it, do your own.

David

[Tom Myers]

Wow!! what did you use to make that magnificent bullet drawing? I am impressed.

Tom Myers

[only1asterisk]

Address for payment is:

David Harris
PO BOX 792
Morgantown WV 26507

David

[only1asterisk]

Tom

I didn't do that one, Blammer did. I just do stick drawings. I'd be curious to know myself.

David

[Blammer]

I used my Alibre CAD program.

3D and 2D and stuff.

David, if you need another drawing or something with or with out dimensions or whatever, let me know.

My next "project" is to figure out how to use Autocad..

[only1asterisk]

Mr. Myers,

Would you mind doing calculating the center of pressure for this?

I'll put up a dimensioned drawing in a second.



David

[only1asterisk]

Blammer,

Will do.

This bullet is going to be one hell of a penetrator. I think I'll call it Blammer's Bear Buster. B³ for short.

David

[Blammer]

that's too funny!

[only1asterisk]

It's also a hell of a lot shorter than typing .433" diameter, 330 grain, Plain-Based Long Medium Nose Dual Crimp.

David

[Blammer]

and THAT is were "copy" and "paste" really shine!

[only1asterisk]

How is Alibre to use? Are you running the personal version?

David

[Tom Myers]

Mr. Myers,

Would you mind doing calculating the center of pressure for this?

Here 'tis.

I need someone to tell me how to get photobucket to show the image full sized.

Tom Myers

[only1asterisk]

Many thanks, Mr. Myers!

That's excellent. Some people were having trouble viewing images since the update, but I see them all fullsize, no problem.

David

[targetshootr]

Nice. Does the 'center of pressure' of a boolit affect performance?

[smokemjoe]

That will be a good bullet for the 41 Swiss. or 444 Marlin, Size it from .428 to .433

[Tom Myers]

Nice. Does the 'center of pressure' of a boolit affect performance?

The Center of pressure is based on the profile area of the bullet and represents the theoretical center of air pressure on the bullet as it is flying through the air with a slightly nose-up attitude.

The farther the center of pressure from the center of bullet mass, the greater the leverage that is applied towards creating unstable bullet flight. Therefore, the closer the center of pressure is to the center of mass, the less leverage and the more stable the bullet is supposed to be. Based on my experience, it seems to work too.

Respectfully,
Tom Myers
Precision Ballistics and Records

[only1asterisk]

Therefore, the closer the center of pressure is to the center of mass, the less leverage and the more stable the bullet is supposed to be. Based on my experience, it seems to work too.

It should. It is also a royal bitch to calculate. I usually guess.

David

[Tom Myers]

You can also find the center of pressure without calculating.

If you can make up an accurate profile drawing of the bullet on a piece of stiff paper or thin cardboard, Simply cut it out and balance it on the edge of a ruler or knife blade. The balance point of the cutout is the centroid of the bullet profile and represents the center of pressure of the bullet, but it IS NOT the Center of MASS of the bullet that it represents.

You can also find the Center of Mass of the bullet without calculations by placing a bullet on it's side and use a knife blade caliper to pick up a bullet with the caliper blades held vertically, gripping the bullet on each side of a driving band or in a grease groove. When you pick up the bullet precisley at the center of mass, it will remain horizontal. But even the slighest grip off of the center of mass will allow the imbalance to cause the bullet to tip.

Tom Myers

[Andy_P]

That's practically a copy of the custom mold I had made by Mountain Molds for my Vetterli, without the extra crimp groove.

http://castboolits.gunloads.com/showthread.php?t=22981



Shoots very well in my Vetterli.

[bearcove]

I'll send a check this weekend. Just what I need for my 444 contender carbine. Glad you put 2 crimp grooves so it can be seated deeper for 44 mags that don't have long cylinders. I bet if you trim some brass back to 44special length most 44 mags would handle it.