I have been disposing of my molds to acquire better casting solutions, via LBT or Mountain Molds, as needed.

I reload for 45 Colt (FA M97), 480 Ruger, 475 Linebaugh, and 45-70. I intend to acquire one two-cavity mold for each caliber - revolver bullets to be plain base WFN, 45-70 LFN bullet to emulate the shape of Beartooth's Piledriver Jr. and use gas check.
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45 Colt (FA M97) bullet will be 270-300 grains.

480 Ruger (SRH) and 475 Linebaugh (FA M83) bullet will be 400-420 grains.

45-70 (Marlin M1895 XLR) bullet will be 415-430 grains.

Revolver bullets are WW and WW + 2, velocities not to exceed 1200 fps. Powders are Titegroup and H110 only to allow me to reload for pleasant shooting as well as hunting.

Rifle bullet will achieve as high velocity as is safe - that is, my target velocity from Marlin XLR (24-inch barrel) is 1900 fps. If I can kvetch out more, that's what I'll do. The load is not intended to be pleasant to shoot. I will use a sandbag "recoil pad" during most practice sessions. I anticipate no problem associated with excessive recoil during hunting season since the load would be fired no more than a few times in the field.
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I have acquired a Star lube-sizer with heater. When the seller's Ballisti-Cast lube-sizer is delivered to him, I take possession of his Star. I estimate transfer to occur in about 10 weeks. Seller recommends LBT blue lube for all bullets.

If I've left out any needed information, please ask for it. I'll do my best to supply it.
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How many lubrication grooves for each bullet identified? And what shape - depth, length, etc. - for them to achieve accuracy with as little leading as I can from my equipment?

That's a good question? I don't know what assumptions the commercial makers use? They may size their molds for a particular alloy, but unless they know what powder you will use and what velocity you will try for, not to mention what lube you will use, they can't be too exact on groove capacity. I've shot a number of slower velocity loads using bullets with multiple lube grooves by filling only the bottom groove. They don't lead and more lube just makes more smoke.

Veral Smith will probably give you a number of grooves he knows is good. If you have to make the choice for the others, having noticed most recovered cast bullets still have most of the lube in the grooves, my inclination would be not to make them too big. Indeed, so many people have had good luck just using liquid Alox lube, even on bullets with conventional lube grooves, that I am not convinced they need to be much deeper than the rifling lands for the purpose of lubrication alone. The main value of a deep groove is just good fill flow from the lubrisizer.

Bullets designed long ago,seemed to have more lube grooves.
As velocities increased,and better lubes were developed,less lube became more popular.
I do recall that,in my 22 Hornet,the 43 grain Loverin bullet,with 4 grooves,was the only cast bullet that shot accurately in my Savage rifle.
However,favorite bullets,in all other calibers,had less lube.
I suggest that you plan on using less lube.
Frank

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