I have seen pics posted online where a recovered bullet(from buff) has seemingly no deformation at all in fact so low was it that it was considered almost load worthy again.

Anyway to the deflection issue apparently some of the US finest`s Dept`s (?) are testing and are indeed impressed with the deflection test results at this stage... for the like of shooting a terrorists head on an angle through glass perhaps,who knows?

Heres a pic of a test version stainless tipped pill recovered from a buff

And another standard recovered hydro ...not much sign of any flattening there at all.