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Old 08-20-2012, 14:21   #18
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Join Date: Aug 2012
Location: Brevard, FL
Posts: 242
Unburned Powder in Sub-max Loads

If I may butt in here...
I'm researching an issue I have just seen in my new 10mm loads. I have actual unburned powder ( Blue Dot discs ) forward of my muzzle with only mod loads... for ex.:
155g JHP (montana golds)
12.5g BD
CCI- 300 (LPP)
1.260" COAL
I'm shooting these out of a factory new G20FS...not SF... w/ stock bbl and a 22# SS RSA. I know BD is slow but the max load for this in Hornady guide is 12.9g. But I was also getting less than advertised vel.'s per book speeds. Usually, I get higher than adv. vel. in .40 loads out of this book. Not sure that even matters. But something is afoot at the Circle-K.

So, why the inefficient powder burn?
Maybe shorten my COAL gradually but hold the charge?
Use mag primers ( CCI- #350 )?
Is this characteristic of BD w/ lighter projectiles?

I have other powders that are faster but I bought the 5# keg of BD specifically for loading hot 10mm. It seems like I'm just wasting powder. I'd' like to resolve this issue. (duh) I'm open to sound advice from anyone else who's seen and resolved this 'problem' and would like to share some remedies. TIA!!
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