Author Topic: 2 Cavity Mould  (Read 1183 times)

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Offline mam40k

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2 Cavity Mould
« on: October 24, 2005, 12:05:10 PM »
I was looking to have a 2 cavity mould made for a 45-70. I would like something in the 520-550 grain range that would be good for silouette shooting. Possibly similar to Paul Jones 540 gr creedmore. Although I don't know if I want a bore rider or not. I'm not sure of the advantages and or disadvatages of that type of design. One of the things I was wondering is it possible to throw quality bullets out of a 2 cavity mould that will shoot accurately at long range? I'm new to casting but I've done a little with my buddy and one cavity moulds are slow. But if that's the only way to get an accurate bullet I will have to stick with it. Any information you could provide would be helpful. I would also like to have the prices of your moulds if at all possible.

Mark

Offline Haywire Haywood

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2 Cavity Mould
« Reply #1 on: October 24, 2005, 12:28:30 PM »
The LBT catalog with pricing is the first posting in the forum.  Lube prices are not listed for some reason.  $3.50/stick.  

Could the lube pricing be added up there?

Ian
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Offline Veral

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2 Cavity Mould
« Reply #2 on: October 30, 2005, 05:52:26 AM »
Lube prices are actually $35 for 10 sticks, plus $6.30 shipping in the US, or $85 for 30 sticks, plus $7.90 shiping.  The catalog should have the prices posted fairly soon.

In 25 years of mold making, I have yet to have a customer report less accuracy from a two or four cavity LBT mold than from a single cavity. (I used to make 1 cavity but no longer do it.) ( Cherry cut molds can't duplicate this reputation.)

Bullet length is limited to 1 3/8 inch, which makes pointy 45 caliber maximum weights just a little over 500 gr.  Bore ride nose bullets are fine with black powder if you use the traditional soft alloys and balance hardness to the powder charge till accuracy peaks.  At this point, if fired bullets are recovered without to much impact damage.(easy from snow, if picked up in the spring) you will find that the entire body has expanded to groove diameter.  Because of this upset, pointed bore ride nose bullets will slump back with the nose off center and out of balance, while the traditional round nose forms will produce a straight cylinder with a blunt and quite well balanced ball up front.  The good balance is why such bullets turn in exceptional accuracy, but the blunt form caused excessive air drag.  Because the bore ride nose has to slump to fill the grooves to get accuracy, and the main purpose of having the BR nose is to allow chambering in spite of powder fouling, BR noses on this type bullet should be fitted a good .010 smaller than bore, or there will be no chambering advantage.

Customer reports (I have no experiance with black powder cartridge loads.) indicate the best long range accuracy is obtained with straight bodied bullets at full groove diameter, with enough hardness to prevent bullet slump, or obturation, thus maintaining near perfect balance.  Such a bullet in the heavier weights requires rethroating most 45-70 rifles to allow seating out so enough powder can be used to get speed up to desired levels.  Also the throat will have to be swept out as needed to allow the close fitting bullet to chamber.
Veral Smith deceased 1/19/25

Offline R J Talley

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2 Cavity Mould
« Reply #3 on: November 10, 2005, 06:00:16 PM »
Mark, I have two of Veral's 45 cal moulds. One is a flat point and it works very well out to 400 yards or so. MOA groups using GOEX BP and White Lightening lube are achievable. (I shoot a 45-90 Sharps Pedersoli) I also had Veral make me a BP bullet using a bore riding design and a pointed nose. This bullet is trickier to get to shoot well but, it will shoot into 36" at 1000 yards (five shot groups, Swiss Fg powder and White lightening or SPG lube) if I do my part. I cast them from 1/30 alloy and size them to .459  My chamber changed slightly after I used Veral's firelapping kit. That enabled me to seat bullets farther out into the rifling. There seems to be no real noticable variation from one cavity to the next in either mould. Bullet to bullet variation is equal to or greater than cavity to cavity.

R J Talley
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Offline Veral

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« Reply #4 on: November 21, 2005, 05:40:16 PM »
I'm hearing very good reports about white lightning blackpowder lube.  It's main problem being the large quantities required to order, but many shooters are dividing and sharing.
Veral Smith deceased 1/19/25