I used up one 500 count order of Campro, 158grn FC FCP
I ran into a similar issue as Ganderite did on the first 50 rounds, which were used in 3 different revolvers.
Two were MP10 38 specials and one was a 686.
All three pistols "spit" gilding metal and I quit shooting them before the original batch was finished.
The loads were appropriate for cast lead with a gas check.
I took the rest home and with an intertia puller, broke down the remaining rounds.
I notices "streaks" below the indentation left by the crimp.
The copper coating was coming off and the lead underneath was showing through.
I used the 38 Special rounds in all three handguns, didn't load any to magnum specs.
So, I loaded another 50 bullets into cases with belled mouths and seated them without any crimp.
This set of dies is made to ''tight tolerances"
After sizing, and inserting bullets there is always a bit of a bulge on the case, at the base of of the bullet. The loads really don't require crimping.
If I were using them in a lever action rifle, I would use a crimp and likely never notice that the gilding material was scraping off.
The cartridges that were loaded without the crimp were just fine in the same three revolvers, when I tried them again.
As long as you know what might happen, and adjust the dies accordingly you should be OK to go.
The Campro bullets shoot well in my revolvers and lever action carbine. They aren't tack drivers by any means, but plenty good enough for what I'm using them for, at the ranges I shoot.
IMHO, the Campro are a great alternative for those that don't want to be bothered to cast/powdercoat, or just cast/lube.
Slightly more expensive than doing it yourself but only slightly, for those that are buying their materials to make up the bullets.
If you can scrounge materials, then things change, but I've noticed very few hand casters do a good job, properly sizing, lubing, coating.