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Old 08-20-2012, 14:38   #19
WiskyT's Avatar
Join Date: Jun 2002
Location: North Carolina
Posts: 11,766
Originally Posted by pasky2112 View Post
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!!
I would check out data in other manuals. Many times, some manuals are much lower than others in terms of charge weight. I don't load 10mm so I don't know the ins and outs of it. But, I have learned that for the most part, Hornady and Lyman manuals are very conservative. I'm not saying just increase the powder charge willy-nilly, I'm say see what Nosler, Speer, and Sierra have to say about it.
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