There is buckshot and there is BUCKSHOT!
There is a world of difference between the little .33 caliber, 54 grain, 00 buckshot and the Dixie Tri-Ball .60 caliber, 315 grain BUCKSHOT!
You will get complete penetration on any reasonable shot taken on whitetail deer with Tri-Ball loads. Three through and through .60 caliber holes let in a lot of air and let out a lot of blood.
Don't confuse the Dixie Tri-Ball with those little 00 buck loads!