Quote:
...can ruin patterns! Heavy loads combined with short barrels can exhibit high muzzle pressure which in turn can distort the gas seal causing the wad release shot unevenly.
I have tested heavy buckshot loads that would pattern tightly from a 26" barrel and blow patterns with a 20" barrel using the same load and choke tube. The culprit was excessive muzzle pressure unevenly flaring the wad gas seal causing the wad to tip or yaw on exit.
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That being said, I've never shot any low recoil shells of any kind out of my shotguns, but would low recoil buckshot hold tighter patterns, due to lesser pressures? Very curious to find out this info.