Have a Savage 24 20gauge/ 30-30 that I use for woods walking. A few days back I was walking in an area that is over run with feral pigs. The owner says if you see them, shoot them. Anyway several cooking size pigs came out of the palmettos at 15-20 yards and I shot 1 with the 30/30(31141 over 15gr 2400) and the next one with a #4 Heavy Shot factory load. Figured the shot load would kill the 100lb pig, however most of the shot exited the off side. Is it normal to get that much penetration with #4 shot or was it the Heavy Shot.(gun is full choke and it looked like the whole load impacted on the ribcage) - Talked to the friend that loaded the shotshells - 1and5/8 oz Hevi-shot brand #4 shot ,sieved for the largest size in the bottle. The shot may be larger than #4, steel shot wads, 3 inch 20 gauge, 1250 fps@ 10 feet. The only shot that fully penetrated hit no bones. At the time I did not think to take pictures, however went back to the spot and the 20 gauge shot was 34 feet from my foot prints to where the pig fell.