anyone used these on elk? i shot a great 5 shot group with them this weekend and was thinking about changing from nosler partition to these. both are in the 180 size but the TT shot a group of 5 at 100 yds that was all touching in a 4 leaf clover (one enter the same hole as a previous shot) the partitions tend to be in the 1 to 1 1/2" grouping. if the expansion and retention is any good they are the answer to my long range shooting. i've read their advertisement but i would like to have some personal input.