You need to research them before committing to them.
I've used the 115gr Hunting VLD in the .257cal. I used them in both a .257Roberts and a .257wby. I've never shot game with the .257mag, but did kill several with the .257Roberts.
Performance was as advertised. Bullets traveled about 2" and then for lack of a better description, exploded. Then, the base of the bullet still in the jacket, exited.
Actually, performance was as good or better than what I've seen from Nosler partitions.
I'm not a "fanboy" of the Nosler's. They are good, but not up to the hype. I've gotten just as good of performance from "good ole" Speer's, Hornady's, and Sierra's. Especially the Hornady Interloks and Remington CoreLokts.
The last deer I shot last year, I took with a 70gr Berger VLD from my Mossberg MVP. (20" light fluted barrel .223/5.56). Range was whopping 25yds. Foward raking behind the shoulder heart shot. Deer was "trotting" and flinched at shot and bolted for another 25yds and dropped. Exit wound was 2"x3". Heart, part of left lung were blown out the exit wound.
Load was 25.0gr of RL15, Fed Mil Spec case, Win SRP, bullet seated to fit magazine. Shoot about 5/8" groups (5shots). Accuracy wasted at 25yds !
No complaints from me except for high cost of bullets. Just know that they have fairly explosive expansion, and may not give the penetration that some seem to expect. I'm perfectly happy with Hornady "Blems" at 1/4 the price....