Thought someone a while back posted a warming by Woodleigh to not use their guilding metal coated steel jacketed FMJ's in side by sides.
Friend if mine is using TSX's in his Merkle's 7x65R barrel as a hunting bullet. Mind you, he doesn't shoot it a lot, but has been using them since their inception. They are very accurate for him - 160gr., I think and not a light load.