Q. Help, I need load data for Woodleigh 600 Gr PP and 600 Gr. solids in 505 GIBBS, Thanks. - Michael

A. Published loads for the .505 Gibbs are rare. When Phil Shoemaker wanted to try it with 600-grain cast bullets, I told him to fill the case with IMR-4831 or ACC-3100. That would give decent black-powder velocities but limit pressure to around 28,000 psi. I’ve since discovered a couple of other loads, including 85 (max) grains of IMR-3031 and 90 grains of IMR-4064. That should achieve around 2,000 fps, give or take depending on barrel length and normal pressures. Other powders in this burning range include RL-15, H or IMR-4895 and Varget would also serve, starting with no less than 80 grains, and quitting when you get at or just below 2,000 fps. Assuming the Woodleigh bullets are up to it, these loads should provide about all the fun you might want, and kill anything that walks or crawls. - Dave Scovill
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Q LoadData.com, I have a .222 Rem. Hornady 75 gr. v-max bullet. I can only find load data for up to 60 grain bullets in your database.

A. Hornady states the .222 Remington is effective with bullet weights from 40 – 60 grains and up 55 grains with the V-Max – because the standard twist in the .222 is one-in-14 inches too slow to effectively stabilize longer, heavier bullets. Therefore, they don’t list the heavier V-Max with the .222 nor do they recommend it, since it would probably tumble or at the very least, shoot scattered groups. You will need a barrel twist of around one-in 7 1/2 or 8 inches to effectively stabilize longer, heavier bullets in the .222, and even then, they are so long as to require a special chamber to seat them out far enough to allow any reasonable powder charge.