Is Bl-c 2 position sensitive?

[War Smith]

Pretty much right now I have a decent supply of Bl-c 2, 147/150 grain FMJs, 308 & 30-30 brass.
I was wondering how far I could download this setup. Without it being dangerous. Or having to tilt the case up before firing?
Making gallery loads and the like. I know it's on the slow end of mid-speed powders. So is that too slow?

I also have some h110 & Tight Group. I know I can make subsonic loads with the Tight Group. But what about the h110 and the Bl-c 2?
And yes I know that the BL-c 2 is not temperature stable.

Any thoughts or should I just give up on this concept?
Thank you.

[Unclenick]

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The general rule of thumb is not to fill the case under 70% of the space under the bullet. The Late Dr. Lloyd Brownell determined that pressure for many powders can get very erratic below about 60%, and the 70% number has a safety margin.

BL-(C)2 is, as Hodgdon told me, the original formulation of Western Cannon 846, which was developed during WWII to load 303 British for the Allies, and used in 7.62 M80 Ball ammo up through the 1970s. It is a bit harder to ignite than stick powders, and indeed, CCI changed its magnum primer formulation about 1990 just to be able to do a better job of lighting it. With empty space in the case, you will definitely need the extra ignition pressure from a magnum primer to get the best out of it.

Today, many primers have the added ingredients needed to light the older spherical formulations. Federal 215s are currently the hottest of the large rifle primers and work very well. But if you are shooting in an M1 Garand or other floating firing pin military type weapon, the CCI #34 primers have their sensitivity lowered to military inspection numbers, and would be a good choice (they are also magnum primers).

In an older Winchester case (59 grains case water overflow capacity vs more like 57 grains for a lot of others), 36 grains is about as low as you can go in Quickload for a 150-grain Hornady FMJ seated to its crimp cannelure (COL 2.700" on average because this is a short ogive bullet). Note that the pressure is pretty low (predicted at about 23,000 psi), so this powder is likely to burn pretty dirty and incompletely (about 12% unburned thrown out of the muzzle).