Not Laser Cast, but I seldom have had good results with commercial cast bullets and full loads of H110. In my experience with severally calibers 2400 is a much better cast bullet powder. Even then with commercial cast I wouldn't be surprised by leading at higher velocity. Most of the commercial cast bullets I shoot are over unique

Umm, .32H&R, .44 Spl/Mag, .45-70...mebee more but it's been a few years. The local availability seems to have dried up.

For pistols, like Jared, I used Unique and mostly shot them at ca. 1000fps or so. I don't recall which powder was used for the .45-70 but I'm sure it too was held at fairly pedestrian velocities.

I don't recall any issues loading or shooting and would use them again if they come back. The cost is favorable.

Have you considered coated bullets like those offered by Missouri Bullet Company?
http://www.missouribullet.com/

I have shot thousands upon thousands upon thousands of Laser Cast Bullets BUT not at full house velocities. In standard loads they often out shoot my carefully cast, lubed and sized bullets. You will have an easier time finding an honest politician than getting plain-based hard cast bullets to shoot well and/or without leading at full house velocities and especially so in a carbine. In a .357 Magnum you need at least a gas-checked bullet.