Generally, you can load more powder and achieve a higher velocity using XLCs than you could using a standard bullet of equal weight. Barnes's reloading data for XLCs specifys this, and from what your saying you "maybe" and yes thatsa huge maybe, able to safetly exceed XLCs loading data. Being able to push the same weight bullet at 150fps plus was on ofthe main draws with I was reserching a load to use for elk in my 7mm-08.