I think if you get Lehighs 300gr 458 it will be a very similar base as a Bloodline but the 452-250gr or the 458-275gr wont have the Bloodline changes Sabotloader mentioned.

That 250gr is longer. That looks much different than the 250 Lehighs i had. It looks as long as a 275gr.

I want to try a 50-325 or 300gr for 54x50. I think my 275s are going to be nasty in the Harvester 54x45s.