Pattern vs. Velocity?

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Pattern vs. Velocity?

Postby hunter177 » March 19th, 2011, 11:04 pm

I patterned my 870 @ 40 yards with two load/choke combinations. I know both will kill a turkey but should I go with pattern numbers or higher velocity?

Federal Mag-Shok FC 3", 2 oz., #6, 1150 fps
Primos Jelly Head .665
7 pellets in the vitals
81 pellets in the head & neck
196 pellets on a 12"X12" target

Winchester Supreme HV 3", 1 3/4 oz., #5, 1300 fps
TruGlo Gobble Stopper Extreme .665
9 pellets in the vitals
67 pellets in the head & neck
166 pellets on a 12"X12" target

Any help would be greatly appreciated, thanks!!

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RE: Pattern vs. Velocity?

Postby shaman » March 20th, 2011, 1:12 am

When you figure my average gobbler succumbs well inside 20 yards, you might think I was the wrong guy to answer.  However, let's get Newtonian here and see what gives.

First off, look at pellet count and velocity buys you.   Pellets?  You are imparting a force on the turkey with pellets.  If a pellet hits in the vital region, it is going to do damage.  It contributes to the mass component of the Force= Mass X Acceleration  equation.  What you want in the end is more F. How much M or A is immaterial

Velocity is a component of the F= M X A equation .  It is buried in the Acceleration.   Acceleration is change in Velocity over time.  In this case, you've got so many feet per second  suddenly going to  Zero when it hits the turkey's head.    A higher V  results in a higher A.

So what you would have to do is figure  how much additional Mass is in one load  versus the  higher Acceleration  in the other and how each affects the Force.

AHHHHH!  However, you had the answer all along and you weren't really noticing.  The key here is not the total number of pellets, but how many landed in the vitals.  The second load  has 9 versus the other's 7.  The second load has:

a)  More Massive pellets (a greater M)
b)  More Pellets  (still greater M)
c)  Higher Velocity (greater A)

F=M X A  :  Definitely the second load is a better bet at 40 yards.  At 20 yards. . .well, we can't say, but if your aim is right , that gob is going to be missing his head.   Honestly,   my guess is both are going to bring the turkey down out to 40 yards.  However, I have always been a fan of bigger Mass myself.  I always shoot #4. 
Genesis 9:2-4 Ministries of SW Bracken County, KY

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RE: Pattern vs. Velocity?

Postby Fan Club » March 20th, 2011, 4:20 am

I agree with Shaman, Steve.
I've agreed with this philosophy since Jay Langston was the shooting editor at Turkey Call back in the mid 90s and would write articles on mass vs velocity. I've always shot #4s for the down range energy long before they invented Hevi-Shot. If the patterns are similar, I'll always go for the larger shotsize load.
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