This is the expensive option, but it's a good idea to shoot paper with the same round that you intend to carry - at least enough to really know the round.
I have found that recoil and cycling varies to some extent for the grain and load, velocity and mass, in the 10mm family offered by Underwood - not to mention ballistics characteristics.
The key to the Lehigh Defense slug is high velocity. Hollow-points appear to have a sweet spot velocity far slower, and is probably the reason for the under-loaded 10mm rounds IMHO. High grain slugs are the usual preference for thick skulled game hunting pistol use.
There are other good manufactures, but I found that Underwood is a fairly consistent load, at around a 5% variance.
Thank you sir! I just ordered 3 boxes. I spoke to one of their techs on the phone. Very friendly and helpful.
MFO