Pglasgow, this one is particularly interesting to me because the weight and length ratio is very good for the1-28 twist by the formula I use. I just happened to stumble across it when I was looking at some other bullets they are so expensive that I though I might try to get some info befor maling up my mind on weather or not to try some.
As for the obduration of a coated bullet,I did some experiments on that about 30 years a go when there was not much available commercially and they will a 41 in a 50 cal. but the centering is very critical. Lee