re: Effectiveness of 20 gauge with #6 shot against large coyote within 30 yards?

Again, your quote was...

quote:

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Folks tend to lose sight of the fact that a #6 pellet has the same killing power coming from a 12,20 or 410

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I'd agree if they are going the same speed. The problem is that for the vast majority of ammo, unless you are talking the hottest of the hot, turkey loads, they velocities aren't the same. The OP said he had a heavy field load. This is Federals velocities for heavy field loads, on 2 3/4 inch shells:
12 gauge: 1255
20 gauge: 1165
.410, 3": 1135

We can certainly find 20 gauge shells hotter than 12 gauge. Same for .410 over 20, etc. But comparing similar types of shells from the manufacturer, the larger the caliber, the faster the velocities. There are exceptions, but as I said previously, on average, those are exceptions, not the rule. The rule is that a .410 #6 shell doesn't carry the same punch as does a 12 gauge #6.

Hopefully I made this case in the most non-controversial, explanatory, civilized tone that can be expected.

And oh yeah....

Called compensatory reproduction