Never heard of it,or seen one. Hint. Congratulations?!?
Forced to speculate,I'd prolly keep an eye on freebore,due the tiny mag constraints involved and would surmise no more than .125" there. Mine would keep Lapooey Virgin neck clearance in mind too. Hint.
The Two Porty Roy cain't hang and the 25-TwatSix is laughable. Pass the Lapooey brass,'22 and 105 Hornie BTHP's. I've seen the .530 BC do some thangs and 3400fps don't suck. Hint.
I tend to dupe Montucky conours,though shorten the shank. Only Shaen would touch it,though I'd start with a bigger blank.(grin)
Just sayin'..........................