Thanks Twister'sPa for providing additional information!
HeviShot lists chemical ingredents of these pellets as tin (Sn), iron (Fe) and titanium (Ti). From this and claims of softness similar to lead alloy and bismuth shot, I am lead to think that tin is the matric (much like plastic is for Kent T-M) and that Fe and Ti are alloyed or mixed and this alloy or mixture is then ground finely and distributed throughout Sn matrix, much as finely ground Ti metal is dispersed through Kent T-M shot.
Two statements I find bothersome, one you pass on, "that is if the gun is not too tightly choked" and the other is in Cabelas "For use in any firearm than can safely fire modern lead trap loads." Both statements, if indeed fully correct, make me unwilling to use these loads in my old (pre 1922), essentially CIP proofed, tightly choked old doubles.
Niklas
