That is a Barnes/Knight SpitFire and i actually dont recommend them. Ive seen them fail to expand and expand poorly because of the tiny hollow point and not enough fps. If you want to try one get the 245gr version. Most of those reviews are positive. I like the Expander MZ, XPBs or the TAC-TSX 300gr made for the 458 SOCOM much better.

Traditions has a deal on these for $7.99/15 and they are proven killers over a wide fps range, Plus very well made.

Traditions PLR aka Parker Ballistic Extreme 275gr