When i bought this drilling more than 20 years ago, one of the first things i did was make (form) 20 cases for it and head to the range.
It didn't take long to figure out that 200 NP's was going to be the "one load for everything" in this gun, so off i went into the bush with my new (to me) gun.
Now, with more than 20 years of filling my freezer, the same gun and the same load is still working perfectly for me. I harvested this buck a few days ago...
Staying with one load WILL make you a better game shot, so find the load and stick with it!!
DM