That would ver nearly be a 375 Scoville(30-06 necked to 375). .009" diameter change is all you gain. 9.3x62 is not wildcat.
Actually the 375 Scovill is the 9.3x62 necked up to .375. When Dave was working on it he didn't have 9.3x62 brass so used 30-06 brass that was fireformed to the 9.3x62 chamber ( which is why some folks mistakenly credit it as a necked up 30-06)
It could properly be referred to as a 9.5x62.
It is also a great round. I get a solid 2400fps using 286gr .375 Grand Slam bullets.