.7 rule for shot density

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MitchH
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Joined: Tue May 01, 2018 10:00 am

.7 rule for shot density

Postby MitchH » Wed May 02, 2018 9:17 am

I’m new to shotshell reloading. I’ve read in several topics about pattern density about the ( .7 rule ) to check pattern density at different distances. Can someone explain this rule and how it works. I’m currently working on a load of TSS for turkey hunting and would like to optimize it for best performance. Thanks



hawglips
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Joined: Fri Feb 19, 2016 4:56 pm

Re: .7 rule for shot density

Postby hawglips » Wed May 02, 2018 9:34 am

All it is, is a way to estimate what your pattern density would be at longer ranges, after establishing it at 40 yds. It's something I noticed over the years, and it seems to be fairly accurate.

Here's the way I use it. If a shell will put X pellets in a 10" circle at 40 yds consistently, then multiply the X by .7 to see what it will do at 50 yds, then multiply that number by .7 to see what it will do at 60 yds, etc.



MitchH
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Joined: Tue May 01, 2018 10:00 am

Re: .7 rule for shot density

Postby MitchH » Wed May 02, 2018 9:39 am

Ok. Now it makes sense. Thanks for the reply.



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Drakehammer
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Location: Georgia

Re: .7 rule for shot density

Postby Drakehammer » Sat Jun 30, 2018 10:48 am

Hi Hal. Does that .7 rule apply regardless of the choke constriction used to establish the 40 yard patterns?
Thanks!



hawglips
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Re: .7 rule for shot density

Postby hawglips » Tue Jul 03, 2018 8:54 am

That's a good question, since I've only tested it with turkey chokes. But it seems like it should apply to any choke constriction.



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Drakehammer
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Location: Georgia

Re: .7 rule for shot density

Postby Drakehammer » Sun Jul 08, 2018 4:04 pm

Thanks Hal.




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