First off is 760 is a dirty powder especially in cases shaped like the 22-250, never seen a 22-250 that wouldn't group good with H380, it is thee 22-250 powder.
Second, yes that throat is to far forward if you were still wanting a 22-250 I would say send the gun to Greg Tannel at Gre-tan and have him set the barrel back and look the gun over, lap the lugs, re-crown it, something might not be quite right.
As far as a new barrel I'm not a fan of artillery pieces, the Shilen #5 contour finished at 26" is a great long range but manageable weight barrel. Midway shows a #5 contour 28"in stock, you have it sent to your gunsmith just in time to meet the gun.
https://www.midwayusa.com/product/1554126424
I have 6x47 remington that Douglas put together for me in record time a few years ago from a walmart 700 remington 223. The gun groups as good as any high end barrel I've ever had at 2/3 the price and 1/10 the headache normally involved with having a action re-barreled.
https://www.douglasbarrels.net/shop
Considering barrel life because you seem to like to send lots of bullets downrange like I do you might go with a cartridge that burns a little less powder than the Creedmoors, 6mm br or the new 6mm arc barrel would last a long time and if your making adjustments on a target scope for yardage you'll never notice the slightly lower velocities. You'll notice the difference in recoil and barrel life however.