Gentlemen,

I tested the 77grs Degol Starkmantel bullet only for precision and found it very good.
Should be the optimum bullet for this caliber due to the "hard" construction.

The Reichenberg HDB 68grs (?)shot also very good, but does not have the good ballistic coeficient od the Degol.

I also have a supply of the DKT Bullets of USA.
Quality was not good and the lead was very soft, even softer that the RWS SP bullets.
I did not test these, because of the soft construction.

best regards
Rolf

PS: And yes, this is (at least in my expreience)the best caliber to blow up a rifle if you are not reloading with the correct powders.
Even with RWS reloading recipe matched for other bullets (via Quickload) I got an ugly result:
Primer blown and rifle not to open :-(
Please be very, very careful!