Migra Custom 12 Gauge 3in #4/6 1-1/4oz Waterfowl Shotshells – 25 Rounds – Migra Combinational Load is the answer to multiple hunting situations. The engineered formula delivers uniform patterns and consistent bulk densities that deliver increased kill-ratios with absolutely no fillers. Combined with our patent-pending technology and carefully selected shot combinations Migra shells are deadly and reliable.