Here's my take on shells/patterns/chokes
1. All shot patterns are random. Those patterns are governed by the Gaussian distribution. I'm seriously considering pulling a James Randi and offering a cash prize for the first person who can theoretically and empirically demonstrate that a standard clays load used in a standard shotgun does anything *but* emit pellets that are Normally distributed.
2. "Hole(s)" in your pattern mean that your pattern is suffering from poor density, thus your choke is not tight enough...or...if you are already at max. constriction, you need to use improved ammo to tighten the pattern beyond what Full is giving you with the el cheapo ammo.
2.01a The above condition generally occurs around 30 to 45 yards.
2.5 Patterns can also be tightened via overboring, extended forcing cones, and other mechanical means.
2.6 Belief that any of the above will eliminate "holes" is completely illusory. "Holes" is something that we are externally applying to the results of a random statistical process. There are no holes. There are only patterns that are not dense enough to do the job.
4. A "hole" in your pattern will generally only cause a miss on a dead straight-away target. All other targets are passing transversely through the shot string. This makes pattern "holes" far less important than they are made out to be, as the target inevitably will pass from a "hole" to a denser region as it transits the shot string.
5. 99.999% of targets are missed because they are missed due to user error, not because they flew through a hole in your pattern.
6. Cheap ammo will break targets virtually indistinguishably from high-zoot ammo...right until you hit the range where "Full" isn't "full" enough.
7. The use of high-antimony shot is a leftover from the days of yesteryear when the only chokes were fixed chokes, forcing cones were nasty short, and barrels were all at nominal diameter in order to provide strength with old-school steels. It was the only effective way of tightening your pattern with a fixed IC or Mod choke short of sending the barrel to the gunsmith.
Today, we just screw in a tighter choke and forget about it. It's a $20-$50 problem that saves $30/flat in ammo costs.
Some of these are my opinions. The gaussian distribution is as solid as a fact as thermodynamics and gravity. I'll be shooting cheap ammo...until it is either unreliable...or Full simply isn't full enough. Then I'll buy up.
FWIW...
This post has been edited by EricW: 21 January 2008 - 09:44 PM