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AJ Anderson
2,034 followers
2,034 followers
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I’m no expert at regular prayer – but I’m getting better. It’s important to carve out some time with the ultimate goal making my life around God, instead of “fitting Him in”.

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Okay, I'm trying not to hate on an innovative product. Am I the only one that thinks these photos make it look as if it prints like Gutenberg?
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Almost four months overdue. My life slowed down enough finally to publish a new post. Join me for a humble look at myself in the mirror?
Almost four months overdue. My life slowed down enough finally to publish a new post. Join me for a humble look at myself in the mirror?

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Almost four months overdue. My life slowed down enough finally to publish a new post. Join me for a humble look at myself in the mirror?
Almost four months overdue. My life slowed down enough finally to publish a new post. Join me for a humble look at myself in the mirror?

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Looking for some missing data, perhaps from Quickload... but I'm not a handloader, and haven't plinked down the money for the software myself.

To the best of my knowledge, at about 5,000 psi (internal ballistics pressure) is about the sweet spot for a bullet to uncork from the barrel. Maximum powder burn, yet no velocity loss to friction.

The below image was generated by the Small Arms Defense Journal back in 2012 by actually measuring barrel pressures an inch at a time. As you can see, it's just like they say, "The .223/5.56 round is optimized for a 20 inch barrel".

A similar test was performed by (awesome resource BTW) Ballistics By The Inch (BBTI). http://ballisticsbytheinch.com/ though their test was concerned with velocity and energy (fps and ft lbs) not pressures.

What I'm looking for is internal ballistics pressure data (even maybe estimated) for some pretty standard SAAMI rounds. Specifically, I'd like to find the "sweet spot" barrel length for pistol caliber rounds (based on the 5,000 psi) such as 9mm, 45ACP, etc.

Any help, charts, internet resources, books, etc you can provide. I also believe the information might be in an out-of-print book, some kind of handloader's bible.
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Sometimes this is what a little downtime looks like. One of my Faceplace friends took this photo on a white background. I "fixed" it.
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I've added some new podcasts to my player, and to my Ranker list. Feel free to stop by, vote, or add one.
Also, if you want to read the blog post that started it all: http://cathoholic.info/wwjp-jesus-podcast/

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Join me for a personal look at envy:
Yet another blog post I've sat on too long. Life gets busy, and things fall by the wayside. Never mind the fact that this was one of those blog posts that was never quite finished. Sometimes 500 words is just too short of a goal.

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Join me for a personal look at envy:
Yet another blog post I've sat on too long. Life gets busy, and things fall by the wayside. Never mind the fact that this was one of those blog posts that was never quite finished. Sometimes 500 words is just too short of a goal.

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Last one of these I'm sharing. Opportunity to win one of two custom built ARs. For those not into contests, this is a $400 or $500 value webinar available for free - all about gun law. The webinar is live an has a Q&A period too.
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