Sword tempering temp? 5160 and 80CRV2

[Will52100]

Finally got the nerve up to heat treat a couple of short swords I'm working on. Both just will fit in my kitchen oven. I'm doing the initial temper at 400 deg. Should I raise it to 425 or even 450?

Thanks

 

[Stacy E. Apelt - Bladesmith]

450°F to 500°F

 

[Will52100]

Thanks