How many grains? - The HuntingPA.com Outdoor Community
 
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post #1 of 4 (permalink) Old 12-21-2014, 08:42 PM Thread Starter
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How many grains?

I'm getting back into flintlock season after a 15 year hiatus. At one point I knew the answer to my question, but my head can't find it right now. If I'm shooting a 245 grain 45 caliber maxi ball, what is the ideal grain if using 2F powder? From what I remember there is an amount that burns ideally and any more powder just gets blown out the front of the barrel.

Fred
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post #2 of 4 (permalink) Old 12-21-2014, 10:24 PM
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Re: How many grains?

If you are talking about the Davenport Formula, here it is.

(bore radius squared) x pi (3.1415) x barrel length x 11.5

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post #3 of 4 (permalink) Old 12-21-2014, 11:25 PM
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Re: How many grains?

Whatever load gives you the most accurate group, you don't just pick an arrow and broadhead and let it rip without practice do you?

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post #4 of 4 (permalink) Old 12-22-2014, 12:07 AM Thread Starter
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Re: How many grains?

Quote:
Originally Posted by Retired_Rusty
If you are talking about the Davenport Formula, here it is.

(bore radius squared) x pi (3.1415) x barrel length x 11.5
Never heard of that formula and my limited knowledge was from Charlie Schultz who competed in a lot of PA black powder competitions before he passed about 20 years ago.

So Rusty in my case the equations yields:

.225 * .225 * 3.1416 * 11.5 * 28in = 51.2 grains

I'll use that as a starting point - thank you.
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