5E Ithica SBT 1976 mfg, Light primer strikes, will usually fire on 2nd try, may fire 10--20 then misfire may also misfire 2 or 3 in a row. Have tried 3 or 4 different brands of primers--plastics and papers. New shells or reloads. Shell heads not concave (checked with straight edge) firing pin "appears" to be plenty long enough. Gun has been shot very little. Thanks ---Ross Puls
Edit---Win., Rem., Cheddite, & Noble Sport primers, No problems in my pump.
Edit---Win., Rem., Cheddite, & Noble Sport primers, No problems in my pump.