Goodnews
Funny you ask..Not to long ago I worked up there 430 grain Lazer Cast.I didn't expect the results I got.I am impressed.I had a problem getting there crimp groove not to suck up the brass but finally backed off to 1/2 turn on the Lee crimp for a slightly longer OAL.
Edited to add what I forgot:
Garretts 420 grain Hammerhead had an OAL of 2.537 and the final loads for the Lazer Cast had an OAL of 2.513.That day in 60 degree weather with Starline Brass/CCI#34 primers and Reloder-7 I got:
Garretts 420 Hammerhead gave me 1839 fps that day out of my Guide Gun as a rough comparison load.
43 grains=1723 fps
44 grains=1769 fps
45 grains=1824 fps
46 grains=1868 fps (As far as I wanted to take it in my Guide Gun)
Beartooth 425(Left)Lazer Cast 430 (Center)Cast Performance 420(Right)
This bullet is very similar to Buffalo Bores 430 cast from Hunters Supply.
Jayco