choosing shot size - optimal balance between pattern density and pellet penetration

Open discussion on Tungsten Super Shot "TSS" Handloading.

Moderator: hawglips

Fabalis
Posts: 27
Joined: Sun Apr 03, 2016 11:29 am

Re: choosing shot size - optimal balance between pattern density and pellet penetration

Postby Fabalis » Tue Jul 18, 2017 4:37 am

With that rule I have made a excel sheet in order to choose the load function of the TSS size and the species.

Image

Maybe it's not so accurate but It's better than nothing...

So in blue, there is the optimal load but it works also in green. The white cells don't have enough penetration. In yellow, the penetration is just a little bit under the limit (1 mm less)

Sorry for the units but it's easier for me. So the Load are in grams not in Grains and the distance in meters.

I have made also a link in the waterfowl part of the forum.

cheers



hawglips
Posts: 225
Joined: Fri Feb 19, 2016 4:56 pm

Re: choosing shot size - optimal balance between pattern density and pellet penetration

Postby hawglips » Thu Oct 12, 2017 1:22 pm

Fabalis, that's a great chart, by the way.

Thanks for putting that together.



Dave in AZ
Posts: 82
Joined: Thu Mar 10, 2016 1:38 pm

Re: choosing shot size - optimal balance between pattern density and pellet penetration

Postby Dave in AZ » Thu Oct 12, 2017 4:18 pm

Nice job Fabalis!
I think that's quite useful.
It looks like for your pellets required numbers (110, 150, 190), you're assuming about a 75% pattern percentage or so to get the numbers listed in CONSEP? (85-90, 115-120, 135-145)
That seems pretty reasonable. Now I need to figure out how many grains are in a gram and memorize that!
;)



Fabalis
Posts: 27
Joined: Sun Apr 03, 2016 11:29 am

Re: choosing shot size - optimal balance between pattern density and pellet penetration

Postby Fabalis » Sun Oct 15, 2017 11:19 am

For the calculation, I assume the pattern is 100% at 40 yards and after it's a simple calculation withe the .7 rule. I checked with a few real exemples in France and it works great.

For exemple, 3/3 shovelers (you know we shoot landed) at 72 yards with a 40 gr of #8 which is almost too big for that.




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