They looked good until I got to 400X and everything went blurry. Go figure. Still they should fire OK. Just size to fit 0.001" to 0.002" wider than your measured interference fit groove diameter, load starting a minimum or further of 10% below book value for a similar WEIGHT jacketed bullet, shoot an increasing ladder load test of 3-rounds minimum per target per test watching for over pressure signs, and keep copious notes and all targets for further reflection.
I shot some Lee aluminum mold, lead alloy, 55 grain, 12 BHN, Baiter boolits from below to approaching maximum jacketed book velocity and was doing OK with results until the boolits stopped hitting the 4' x 4' white background at 100-yards where the 8.5"x 11" target was stapled in the middle. It took me by surprise and another minute to ascertain the boolits were evaporating against the wall of air friction within 20 yards of the muzzle. Too soft, too fast, but not high pressure.
Still, approaching 85% of jacketed maximum, and well above traditional lubed lead alloy velocity, I will likely find an acceptable "55 grain pill" accuracy for that barrel in the ladder load data. I also purchased some Rotometals hard alloy for increasing my alloy's BHN. Then I will have an accurate traditional lubed soft lead alloy velocity, a single and maybe multiple powder coated hard lead alloy accuracy velocities, and copper jacketed bullet velocities for that barrel. I'll probaly never buy another jacketed bullet for it again.
Works for me. Good luck.
