Those 53Vmax bullets are awesome. They're all I shoot in my .223AI BUT I highly doubt you'll be able to shoot them in your new 22-250, unless it has a faster twist barrel than what it came with from the factory. Factory Remington 22-250's all have 1-14twist barrels and you need atleast a 1-12 or better yet 1-10. There has even been reports of guys not getting the 53Vmax to work in there 1-12's.
You'll be better off staying with the 50's or maybe try loading some 52Amax but even those could be iffy in a 1-14tw barrel.
Nice looking rifle, I'm sure you'll have lots of fun with it.