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12 gauge Remington #4 buckshot (27 pellet) fired from 18.5" barrel Mossberg 500A cylinder bore into calibrated 10% gelatin.

BB: 590.5 fps, 3.7"

Impact velocity: 1,245 fps
Min penetration: 11.0"
Max penetration: over 14"
Pellet weight: 19.2 gr
Pellet diameter: 0.249"


*Note: 7 pellets exited the back of the 14" block. That
means that 62.5% of the pellets that were captured in
the block exceeded the 12" minimum requirement.

           Thanks for posting.  I like to use larger size shot but that did seem to penetrate decently.

As noted, decent penetration.

Perhaps the 10% denser tungsten composite pellets should be loaded in #4.

Maybe it would improve the range at which #4 displays decent penetration.

Not a major improvement, but a small one.  

I admit that I have loaded my HD shotgun with #4 before.

Thanks for posting, I always enjoy your videos. Having shot a lot of coyotes with shotguns loaded with #4, I'd prefer bigger pellets for something larger. Especially if there could be barriers in between.

This is an important bit that probably bears repeating. I did not include barriers in this test but it seems reasonable to conclude that #4 buck is substantially lacking in barrier performance compared to 00 buck and the penetration at distances more than across the room will probably suffer too. I would only consider #4 buck if I lived in an apartment or maybe if I felt there was substantial risk of a family member being down range during a home invasion.