Own a couple of type 38 sporterized Arisaka rifles, that have been rechambered to 257R, so they're a 6.5x257R. Accurate enough for hunting.

Gent came to our range one day to try out his sporterized type 77 Arisaka, like yours, but it'd been rechambered to 30-06. He'd found it a few days before in a pawn shop for $100.

I'd noticed him setting up to shoot the rifle for the first time and had spotted the box of Remington 30-06 ammo and easily noticed he had an Arisaka rifle. I would chat with him before he began shooting the rifle. I told him not to expect any good accuracy with the rifle, "you have a .308 bullet going down a .311 or .312 bore. After he'd finished shooting the box of Remington 30-06 ammo and retrieved his target from 100 yds downrange, he showed me his target. Darn if there was nothing but 3 shot clover leafs on his target.

Anyway, you do have a very nice Arisaka, really great price.......Congrats.