i asked at the 2007 sci show the same question to merkel and zoli the answer was yes.in a few months i will be at the shot show and i will ask this of all the double makers i see.i am a barnes fan and have been for years.but i also know when to trust experiance so till i find out more i will hold off in my doubles.a barrel will have some whip action when shot being held in place will make this less flexable is this the probable cause or is it isolated,as pointed out before partitions should cause this and hornadery major maker has a new dg steel clad round,nosler new solid,every maker now produces solids and in these days of litagation you think it would be stated not for use in doubles.at the show i will have a chance to ask all yhe ammo makers the same.what do the reloading manuels say not for use in doubles,like the 45 70 round they will state not for use in trapdoor models.and i also asked connie at the show and was told the same.she uses them in her 470.